49 results on '"Nakalembe, M"'
Search Results
2. 182 Description of patients with early stage cervical cancer treated with surgery: fellowship experience at the uganda cancer institute
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Jane, N, Nkalubo, J, Ajeani, J, Nakalembe, M, Nakisige, C, Okoth, A, Ueda, S, and Lee, P
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- 2019
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3. The East Africa Consortium for human papillomavirus and cervical cancer in women living with HIV/AIDS
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Tong, Y., primary, Orang’o, E., additional, Nakalembe, M., additional, Tonui, P., additional, Itsura, P., additional, Muthoka, K., additional, Titus, M., additional, Kiptoo, S., additional, Mwangi, A., additional, Ong’echa, J., additional, Tonui, R., additional, Odongo, B., additional, Mpamani, C., additional, Rosen, B., additional, Moormann, A., additional, Cu-Uvin, S., additional, Bailey, J. A., additional, Oduor, C. I., additional, Ermel, A., additional, Yiannoutsos, C., additional, Musick, B., additional, Sang, E., additional, Ngeresa, A., additional, Banturaki, G., additional, Kiragga, A., additional, Zhang, J., additional, Song, Y., additional, Chintala, S., additional, Katzenellenbogen, R., additional, Loehrer, P., additional, and Brown, D. R., additional
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- 2022
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4. Predictors of Delay Along the Pathway to Treatment for Women with Cervical Cancer in Uganda
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Swanson, M., primary, Nakalembe, M., additional, Chen, L., additional, Ueda, S., additional, Namugga, J., additional, Nakisige, C., additional, and Huchko, M., additional
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- 2020
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5. 182 Description of patients with early stage cervical cancer treated with surgery: fellowship experience at the uganda cancer institute
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Jane, N, primary, Nkalubo, J, additional, Ajeani, J, additional, Nakalembe, M, additional, Nakisige, C, additional, Okoth, A, additional, Ueda, S, additional, and Lee, P, additional
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- 2019
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6. Addressing pain along the continuum of cervical cancer care among women ultimately presenting at mulago national referral hospital and the Uganda cancer institute
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Swanson, M., primary, Nakalembe, M., additional, Chen, L.M., additional, Ueda, S.M., additional, Namugga, J., additional, and Huchko, M.J., additional
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- 2019
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7. Surgical candidacy among women presenting at Mulago National Referral Hospital and the Uganda Cancer Institute with new diagnoses of cervical cancer
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Swanson, M., primary, Nakalembe, M., additional, Chen, L.M., additional, Ueda, S.M., additional, Namugga, J., additional, and Huchko, M.J., additional
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- 2018
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8. Dihydroartemisinin-piperaquine for intermittent preventive treatment of malaria during pregnancy and risk of malaria in early childhood: A randomized controlled trial
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von Seidlein, L, Jagannathan, P, Kakuru, A, Okiring, J, Muhindo, MK, Natureeba, P, Nakalembe, M, Opira, B, Olwoch, P, Nankya, F, Ssewanyana, I, Tetteh, K, Drakeley, C, Beeson, J, Reiling, L, Clark, TD, Rodriguez-Barraquer, I, Greenhouse, B, Wallender, E, Aweeka, F, Prahl, M, Charlebois, ED, Feeney, ME, Havlir, DV, Kamya, MR, Dorsey, G, von Seidlein, L, Jagannathan, P, Kakuru, A, Okiring, J, Muhindo, MK, Natureeba, P, Nakalembe, M, Opira, B, Olwoch, P, Nankya, F, Ssewanyana, I, Tetteh, K, Drakeley, C, Beeson, J, Reiling, L, Clark, TD, Rodriguez-Barraquer, I, Greenhouse, B, Wallender, E, Aweeka, F, Prahl, M, Charlebois, ED, Feeney, ME, Havlir, DV, Kamya, MR, and Dorsey, G
- Abstract
BACKGROUND: Intermittent preventive treatment of malaria in pregnancy (IPTp) with dihydroartemisinin-piperaquine (IPTp-DP) has been shown to reduce the burden of malaria during pregnancy compared to sulfadoxine-pyrimethamine (IPTp-SP). However, limited data exist on how IPTp regimens impact malaria risk during infancy. We conducted a double-blinded randomized controlled trial (RCT) to test the hypothesis that children born to mothers given IPTp-DP would have a lower incidence of malaria during infancy compared to children born to mothers who received IPTp-SP. METHODS AND FINDINGS: We compared malaria metrics among children in Tororo, Uganda, born to women randomized to IPTp-SP given every 8 weeks (SP8w, n = 100), IPTp-DP every 8 weeks (DP8w, n = 44), or IPTp-DP every 4 weeks (DP4w, n = 47). After birth, children were given chemoprevention with DP every 12 weeks from 8 weeks to 2 years of age. The primary outcome was incidence of malaria during the first 2 years of life. Secondary outcomes included time to malaria from birth and time to parasitemia following each dose of DP given during infancy. Results are reported after adjustment for clustering (twin gestation) and potential confounders (maternal age, gravidity, and maternal parasitemia status at enrolment).The study took place between June 2014 and May 2017. Compared to children whose mothers were randomized to IPTp-SP8w (0.24 episodes per person year [PPY]), the incidence of malaria was higher in children born to mothers who received IPTp-DP4w (0.42 episodes PPY, adjusted incidence rate ratio [aIRR] 1.92; 95% CI 1.00-3.65, p = 0.049) and nonsignificantly higher in children born to mothers who received IPT-DP8w (0.30 episodes PPY, aIRR 1.44; 95% CI 0.68-3.05, p = 0.34). However, these associations were modified by infant sex. Female children whose mothers were randomized to IPTp-DP4w had an apparently 4-fold higher incidence of malaria compared to female children whose mothers were randomized to IPTp-SP8w (0.65 v
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- 2018
9. Progression of the first stage of spontaneous labour: A prospective cohort study in two sub-Saharan African countries
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Persson, LÅ, Oladapo, OT, Souza, JP, Fawole, B, Mugerwa, K, Perdona, G, Alves, D, Souza, H, Reis, R, Oliveira-Ciabati, L, Maiorano, A, Akintan, A, Alu, FE, Oyeneyin, L, Adebayo, A, Byamugisha, J, Nakalembe, M, Idris, HA, Okike, O, Althabe, F, Hundley, V, Donnay, F, Pattinson, R, Sanghvi, HC, Jardine, JE, Tuncalp, O, Vogel, JP, Stanton, ME, Bohren, M, Zhang, J, Lavender, T, Liljestrand, J, ten Hoope-Bender, P, Mathai, M, Bahl, R, Guelmezoglu, AM, Persson, LÅ, Oladapo, OT, Souza, JP, Fawole, B, Mugerwa, K, Perdona, G, Alves, D, Souza, H, Reis, R, Oliveira-Ciabati, L, Maiorano, A, Akintan, A, Alu, FE, Oyeneyin, L, Adebayo, A, Byamugisha, J, Nakalembe, M, Idris, HA, Okike, O, Althabe, F, Hundley, V, Donnay, F, Pattinson, R, Sanghvi, HC, Jardine, JE, Tuncalp, O, Vogel, JP, Stanton, ME, Bohren, M, Zhang, J, Lavender, T, Liljestrand, J, ten Hoope-Bender, P, Mathai, M, Bahl, R, and Guelmezoglu, AM
- Abstract
BACKGROUND: Escalation in the global rates of labour interventions, particularly cesarean section and oxytocin augmentation, has renewed interest in a better understanding of natural labour progression. Methodological advancements in statistical and computational techniques addressing the limitations of pioneer studies have led to novel findings and triggered a re-evaluation of current labour practices. As part of the World Health Organization's Better Outcomes in Labour Difficulty (BOLD) project, which aimed to develop a new labour monitoring-to-action tool, we examined the patterns of labour progression as depicted by cervical dilatation over time in a cohort of women in Nigeria and Uganda who gave birth vaginally following a spontaneous labour onset. METHODS AND FINDINGS: This was a prospective, multicentre, cohort study of 5,606 women with singleton, vertex, term gestation who presented at ≤ 6 cm of cervical dilatation following a spontaneous labour onset that resulted in a vaginal birth with no adverse birth outcomes in 13 hospitals across Nigeria and Uganda. We independently applied survival analysis and multistate Markov models to estimate the duration of labour centimetre by centimetre until 10 cm and the cumulative duration of labour from the cervical dilatation at admission through 10 cm. Multistate Markov and nonlinear mixed models were separately used to construct average labour curves. All analyses were conducted according to three parity groups: parity = 0 (n = 2,166), parity = 1 (n = 1,488), and parity = 2+ (n = 1,952). We performed sensitivity analyses to assess the impact of oxytocin augmentation on labour progression by re-examining the progression patterns after excluding women with augmented labours. Labour was augmented with oxytocin in 40% of nulliparous and 28% of multiparous women. The median time to advance by 1 cm exceeded 1 hour until 5 cm was reached in both nulliparous and multiparous women. Based on a 95th percentile threshold, nullipar
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- 2018
10. HPV positivity among women in Central Uganda participating in a Community Health Campaign offering self-collected HPV-based cervical cancer screening
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Swanson, M., primary, Nakalembe, M., additional, and Huchko, M., additional
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- 2017
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11. Closing the praziquantel treatment gap: new steps in epidemiological monitoring and control of schistosomiasis in African infants and preschool-aged children.
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Stothard, JR, Sousa-Figueiredo, JC, Betson, M, Green, HK, Seto, EY, Garba, A, Sacko, M, Mutapi, F, Vaz Nery, S, Amin, MA, Mutumba-Nakalembe, M, Navaratnam, A, Fenwick, A, Kabatereine, NB, Gabrielli, AF, Montresor, A, Stothard, JR, Sousa-Figueiredo, JC, Betson, M, Green, HK, Seto, EY, Garba, A, Sacko, M, Mutapi, F, Vaz Nery, S, Amin, MA, Mutumba-Nakalembe, M, Navaratnam, A, Fenwick, A, Kabatereine, NB, Gabrielli, AF, and Montresor, A
- Abstract
Where very young children come into contact with water containing schistosome cercariae, infections occur and schistosomiasis can be found. In high transmission environments, where mothers daily bathe their children with environmentally drawn water, many infants and preschool-aged children have schistosomiasis. This 'new' burden, inclusive of co-infections with Schistosoma haematobium and Schistosoma mansoni, is being formally explored as infected children are not presently targeted to receive praziquantel (PZQ) within current preventive chemotherapy campaigns. Thus an important PZQ treatment gap exists whereby infected children might wait up to 4-5 years before receiving first treatment in school. International treatment guidelines, set within national treatment platforms, are presently being modified to provide earlier access to medication(s). Although detailed pharmacokinetic studies are needed, to facilitate pragmatic dosing in the field, an extended 'dose pole' has been devised and epidemiological monitoring has shown that administration of PZQ (40 mg/kg), in either crushed tablet or liquid suspension, is both safe and effective in this younger age-class; drug efficacy, however, against S. mansoni appears to diminish after repeated rounds of treatment. Thus use of PZQ should be combined with appropriate health education/water hygiene improvements for both child and mother to bring forth a more enduring solution.
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- 2011
12. Progression of the first stage of spontaneous labour: A prospective cohort study in two sub-Saharan African countries.
- Author
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Oladapo, O.T., Souza, J.P., Fawole, B., Mugerwa, K., Perdoná, G., Alves, D., Souza, H., Reis, R., Oliveira-Ciabati, L., Maiorano, A., Akintan, A., Alu, F.E., Oyeneyin, L., Adebayo, A., Byamugisha, J., Nakalembe, M., Idris, H.A., Okike, O., Althabe, F., Hundley, Vanora, Donnay, F., Pattinson, R., Sanghvi, H.C., Jardine, J.E., Tunçalp, Ö., Vogel, J.P., Stanton, M.E., Bohren, M., Zhang, J., Lavender, T., Liljestrand, J., Ten Hoope-Bender, P., Mathai, M., Bahl, R., Gülmezoglu, A.M., Oladapo, O.T., Souza, J.P., Fawole, B., Mugerwa, K., Perdoná, G., Alves, D., Souza, H., Reis, R., Oliveira-Ciabati, L., Maiorano, A., Akintan, A., Alu, F.E., Oyeneyin, L., Adebayo, A., Byamugisha, J., Nakalembe, M., Idris, H.A., Okike, O., Althabe, F., Hundley, Vanora, Donnay, F., Pattinson, R., Sanghvi, H.C., Jardine, J.E., Tunçalp, Ö., Vogel, J.P., Stanton, M.E., Bohren, M., Zhang, J., Lavender, T., Liljestrand, J., Ten Hoope-Bender, P., Mathai, M., Bahl, R., and Gülmezoglu, A.M.
- Abstract
BACKGROUND: Escalation in the global rates of labour interventions, particularly cesarean section and oxytocin augmentation, has renewed interest in a better understanding of natural labour progression. Methodological advancements in statistical and computational techniques addressing the limitations of pioneer studies have led to novel findings and triggered a re-evaluation of current labour practices. As part of the World Health Organization's Better Outcomes in Labour Difficulty (BOLD) project, which aimed to develop a new labour monitoring-to-action tool, we examined the patterns of labour progression as depicted by cervical dilatation over time in a cohort of women in Nigeria and Uganda who gave birth vaginally following a spontaneous labour onset. METHODS AND FINDINGS: This was a prospective, multicentre, cohort study of 5,606 women with singleton, vertex, term gestation who presented at ≤ 6 cm of cervical dilatation following a spontaneous labour onset that resulted in a vaginal birth with no adverse birth outcomes in 13 hospitals across Nigeria and Uganda. We independently applied survival analysis and multistate Markov models to estimate the duration of labour centimetre by centimetre until 10 cm and the cumulative duration of labour from the cervical dilatation at admission through 10 cm. Multistate Markov and nonlinear mixed models were separately used to construct average labour curves. All analyses were conducted according to three parity groups: parity = 0 (n = 2,166), parity = 1 (n = 1,488), and parity = 2+ (n = 1,952). We performed sensitivity analyses to assess the impact of oxytocin augmentation on labour progression by re-examining the progression patterns after excluding women with augmented labours. Labour was augmented with oxytocin in 40% of nulliparous and 28% of multiparous women. The median time to advance by 1 cm exceeded 1 hour until 5 cm was reached in both nulliparous and multiparous women. Based on a 95th percentile threshold, nullipar
13. Hypofractionated Radiotherapy in Treatment of Cervical Cancer: A Systematic Review.
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Kibudde, S., Fahhoum, M., Ponce, S. E. Beltran, Nankabirwa, V., Nakalembe, M., Kavuma, A., Byakika, P., Phipps, W., Orem, J., Beyer, K., Zeng, J., Mbulaiteye, S., and Grover, S.
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CERVICAL cancer , *PATIENT compliance , *HIV infections , *CANCER treatment , *MIDDLE-income countries - Abstract
Cervical cancer is a significant health issue in low and middle-income countries (LMICs), with 604,127 new cases and 341,831 deaths annually. Despite this, access to treatment with radiotherapy (RT) in most LMICs is limited. Hypofractionated RT (HFRT) is the delivery of larger radiation doses (> 2.2Gy) per fraction over a shorter treatment duration. While HFRT improves patient compliance, data on its safety and efficacy in the treatment of cervical cancer are scarce. A systematic literature review was conducted to evaluate the safety and efficacy of HFRT in the treatment of cervical cancer. A systematic search of published literature between January 1990 and December 2023 was performed on PubMed, African Index Medicus, LILACS, and MedNar. Studies describing the use of HFRT in curative treatment of cervical cancer were included. Using Rayyan, two independent reviewers blindly reviewed titles, and abstracts, for inclusion. Conflicts were resolved by a third independent reviewer. Lastly, full-length articles were reviewed. The analysis was based on RT dose per fraction, acute and late effects, tumor local control, and overall survival. Fifty-two publications were screened, and 10 studies met the eligibility criteria. The majority (n = 4) of studies were from Africa, followed by Asia (India, Bangladesh), and one study from Canada and the United Kingdom. The majority (n = 8) were retrospective studies, and the most frequently studied regimen was 40Gy in 16 fractions. Acute RT toxicity was up to 61.7% with HFRT compared to 58% with CFRT, while late RT toxicity rates were between 11.3% - 42.6% with HFRT, compared to 12.8% with CFRT. Notably, HFRT regimens of >3Gy per fraction had higher later RT toxicity compared to 2.5Gy per fraction. There was no significant difference in acute and late effects of HFRT (40Gy in 16 fractions) compared to conventional fractionated RT (CFRT, 50Gy in 25 fractions). Concurrent chemotherapy was administered in 4 of the 10 studies, while brachytherapy was administered in 9 of the 10 studies. The average response rate at 6 months was 66.15% with HFRT compared to 69.98% with CFRT, while the average 5-year survival was 53.26% for HFRT compared to 53.8% for CFRT. HIV infection had a detrimental effect on local control and survival regardless of RT fractionation technique. HFRT has comparable outcomes and safety to CFRT in the treatment of cervical cancer. Higher radiation doses per fraction (>3Gy) were associated with increased acute and late toxicity rates. However, when comparing HFRT (40Gy in 16 fractions) to CFRT (50Gy in 25 fractions), there was no significant difference in terms of adverse effects. Further studies are warranted to prospectively evaluate the safety and efficacy of HFRT in the treatment of cervical cancer, with the ultimate goal of improving accessibility and outcomes in LMICs. [ABSTRACT FROM AUTHOR]
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- 2024
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14. Predictors of delay in the cervical cancer care cascade in Kampala, Uganda.
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Swanson M, Ayadi AE, Nakalembe M, Namugga J, Nakisige C, Chen LM, and Huchko MJ
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Background Cervical cancer is the fourth most common cancer among women with significant global disparities in disease burden. In lower-resource settings, where routine screening is uncommon, delays in diagnosis and treatment contribute to morbidity and mortality. Understanding care delays may inform strategies to decrease time to treatment, improving patient outcomes. Methods We collected sociodemographic, reproductive health and care journey data from 268 Ugandan women newly diagnosed with cervical cancer. We explored the influence of patient, health provider, system, and disease factors on time to presentation (patient interval), diagnosis (diagnostic interval) and treatment (treatment interval) using survival analysis. Results Median patient, diagnostic and treatment intervals were 74 days (IQR 26-238), 83 days (IQR 34-229), and 34 days (IQR 18-58), respectively. Patient interval was delayed by belief that symptoms would resolve (aHR 0.37, 95% CI 0.24-0.57), confusion about where to seek care (aHR 0.64, 95% CI 0.47-0.88), and utilization of traditional care (aHR 0.70, 95% CI 0.51-0.96). Patient interval facilitators included perceiving symptoms as serious (aHR 2.14, 95% CI 1.43-3.19) and suspecting cancer (aHR 1.82, 95% CI 1.12-2.97). Diagnostic interval delays included symptomatic bleeding (aHR 055, 95% CI 0.35-0.85) and visiting > 2 clinics (aHR 0.69, 95% CI 0.49-0.97); facilitators included early-stage disease (aHR 1.41, 95% CI 1.03-1.95) and direct tertiary care presentation (aHR 2.13, 95% CI 1.20-3.79). Treatment interval delays included anticipating long waits (aHR 0.68, 95% CI 0.46-1.02) and requiring blood transfusions (aHR 0.63, 95% CI 0.37-1.07); no facilitators were identified. Conclusions We identified potentially modifiable barriers and facilitators along the cervical cancer care cascade. Interventions targeting these factors may improve care timeliness but are unlikely to significantly improve morbidity or mortality. Expanding cervical cancer screening and vaccination are of utmost importance.
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- 2024
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15. Integrating Heat-Stable Carbetocin and Tranexamic Acid for Prevention and Management of Postpartum Hemorrhage in Sub-Saharan Africa: A Five-Country Pilot Implementation Study.
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Rushwan S, Forna F, Abubeker FA, Tufa T, Millogo T, Nakalembe M, Adu-Bonsaffoh K, Moses FL, Chinery L, Piaggio G, and Gülmezoglu M
- Abstract
Background and Objective: Globally, postpartum hemorrhage (PPH) remains the most common direct cause of maternal mortality. This study evaluated the feasibility and acceptability of introducing heat-stable carbetocin (HSC) for PPH prevention and tranexamic acid (TXA) for PPH treatment in five Sub-Saharan African countries following recent World Health Organization (WHO) recommendations. This study also assessed healthcare providers' (HCPs') favorability toward using these medicines., Methods: We conducted a mixed methods pilot implementation study in selected facilities across Burkina Faso, Ethiopia, Ghana, Sierra Leone, and Uganda between May and December 2022. We compared baseline data obtained from patient registers with data collected during implementation on the safe and appropriate use of HSC and TXA using descriptive statistics. HCP responses were analyzed qualitatively using a thematic analysis., Results: Following training, HSC was administered prophylactically in 11,329 (92.4%) of 12,262 deliveries in all study facilities which received a uteorotonic for PPH prevention during implementation and was used safely and appropriately. TXA administration for PPH treatment was done safely, appropriately, and within the WHO-recommended time. No adverse events were reported throughout the study. HCPs overall showed high confidence in, and favorability toward, using both medicines., Conclusion and Global Health Implications: Our study demonstrated that HSC and TXA can be safely and appropriately implemented in primary and tertiary facilities, and their introduction is feasible and acceptable from the perspective of HCPs. A holistic approach to training and regular supportive supervision is needed to ensure the continued safe use of these new and lesser-utilized PPH medicines. Dedicated training is required to improve the documentation of patient charts on PPH care. Introducing these medicines holds promise for improving PPH care in low- and middle-income countries, including by addressing suboptimal efficacy due to cold chain system challenges., Competing Interests: The authors declare no competing interests., (© 2024 The Authors. Published by Global Health and Education Projects, Inc., USA.)
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- 2024
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16. Barriers and facilitators of cervical cancer screening literacy among rural women with HIV attending rural public health facilities in East Central Uganda: a qualitative study using the integrated model of health literacy.
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Namutundu J, Kiguli J, Nakku-Joloba E, Makumbi F, Semitala FC, Wanyenze RK, Laker-Oketta M, Nakanjako D, and Nakalembe M
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- Humans, Female, Uganda, Adult, Middle Aged, Health Services Accessibility statistics & numerical data, Patient Acceptance of Health Care statistics & numerical data, Patient Acceptance of Health Care psychology, Rural Health Services statistics & numerical data, Mass Screening methods, Mass Screening statistics & numerical data, Uterine Cervical Neoplasms diagnosis, Health Literacy statistics & numerical data, Early Detection of Cancer statistics & numerical data, Early Detection of Cancer psychology, Early Detection of Cancer methods, Rural Population statistics & numerical data, Focus Groups, HIV Infections diagnosis, HIV Infections psychology, Qualitative Research, Health Knowledge, Attitudes, Practice
- Abstract
Background: Several rural public health facilities in East Central Uganda have sub-optimal, below 50%, levels of uptake of cervical cancer screening services among women with HIV. This is attributed to low cervical cancer screening literacy: limited ability to access, understand, appraise, and apply cervical cancer screening information. This research identified multi-level (health facility, community, interpersonal and individual) barriers, and facilitators of accessing, understanding, and applying cervical cancer screening information among rural women with HIV attending rural public health facilities in East Central Uganda to inform interventions., Methods: We conducted ten Focus Group Discussions with rural women aged 25-49 years with HIV attending four selected rural public health facilities: thirty women who had ever screened for cervical cancer and thirty women who had never screened for cervical cancer across different age categories. Data was collected using a guide based on the Integrated model of health literacy. Thematic analysis was used for analysis. Competences (accessing, understanding and applying cervical cancer screening information) and categories of factors (health system, community, interpersonal and individual factors) of the integrated model of health literacy were deductively derived whereas barriers and facilitators were deductively derived from women's statements., Results: Lack of communication materials and inability to access information were health facility and individual barriers of accessing cervical cancer screening information respectively. Facilitators of accessing information were access to information at health facility, community, and interpersonal levels and women's ability to access information. Barriers and facilitators of understanding cervical cancer information were related to communication materials, provision of health education and women's concentration during health education. Barriers and facilitators of applying cervical cancer screening information were related to communication and provision of cervical cancer screening services at health facility level, and interpersonal level from peers, partners and other family members as well as women's ability to: understand information and access to cervical cancer screening services at individual level., Conclusions: This study emphasizes the influence of multi-level factors on cervical cancer screening literacy among rural women with HIV attending rural public health facilities in East Central Uganda. Improving uptake of cervical cancer screening services among these women requires multi-level interventions., (© 2024. The Author(s).)
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- 2024
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17. Usability of a smartphone-compatible, confocal micro-endoscope for cervical cancer screening in resource-limited settings.
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Kadama-Makanga P, Semeere A, Laker-Oketta M, Mubiru M, Lukande R, Huchko M, Freeman E, Kulkarni N, Martin J, Kang D, and Nakalembe M
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- Humans, Female, Adult, Uganda, Middle Aged, Young Adult, Adolescent, Pilot Projects, Resource-Limited Settings, Uterine Cervical Neoplasms diagnosis, Early Detection of Cancer methods, Smartphone, Microscopy, Confocal methods, Colposcopy methods
- Abstract
Background: More efficient methods to detect and treat precancerous lesions of the cervix at a single visit, such as low-cost confocal microscopy, could improve early diagnosis and hence outcomes. We piloted a prototype smartphone-compatible confocal micro-endoscope (SCME) among women presenting to a public cervical cancer screening clinic in Kampala, Uganda. We describe the piloting of the SCME device at an urban clinic used by lower cadre staff., Methods: We screened women aged 18 and 60 years, who presented for cervical cancer screening at the Kawempe National Referral Hospital Kampala, and evaluated the experience of their providers (nurses). Nurses received a 2-day training by the study doctors on how to use the SCME, which was added to the standard Visual Inspection with Acetic acid (VIA)-based cervical cancer screening. The SCME was used to take colposcopy images before and after VIA at positions 12 and 6 O'clock if VIA negative, and on precancer-suspicious lesions if VIA positive. We used questionnaires to assess the women's experiences after screening, and the experience of the nurses who operated the SCME., Results: Between November 2021 and July 2022, we screened 291 women with a median age of 36 years and 65.7% were HIV positive. Of the women screened, 146 were eligible for VIA, 123 were screened with the SCME, and we obtained confocal images from 103 women. Of those screened with the SCME, 60% found it comfortable and 81% were willing to screen again with it. Confocal images from 79% of the women showed distinguishable cellular features, while images from the remaining 21% were challenging to analyze. Nurses reported a mean score of 85% regarding the SCME's usefulness to their work, 71% regarding their satisfaction and willingness to use it again, 63% in terms of ease of use, and 57% concerning the ease of learning how to operate the SCME., Conclusion: Our findings demonstrate the feasibility of using the SCME by lower cadre staff in low-resource settings to aid diagnosis of precancerous lesions. However, more work is needed to make it easier for providers to learn how to operate the SCME and capture high-quality confocal images., (© 2024. The Author(s).)
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- 2024
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18. Core sepsis-related competencies for medical students: an international consensus by Delphi technique.
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Gomersall ELM, Ling L, Reinhart K, Bion V, Ekesh A, Adu-Takyi C, Azevedo LCP, Banguti PR, Cohen J, Diaz JV, Du B, Goldfarb DM, Gorordo-Delsol LA, Graham CA, Iramain R, Jacob ST, Kecskes Z, Kissoon N, Lipman J, Lundeg G, Maitland K, Mergani KO, Moschides C, Nakalembe M, Ndu IK, Oon J, Sale T, Shresthra A, Stockley S, Talmor D, Tse AB, Zachariah A, and Joynt GM
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- Humans, Developing Countries, Curriculum, Delphi Technique, Clinical Competence standards, Sepsis diagnosis, Sepsis therapy, Consensus, Students, Medical
- Abstract
Background: Sepsis is a life-threatening condition which may arise from infection in any organ system and requires early recognition and management. Healthcare professionals working in any specialty may need to manage patients with sepsis. Educating medical students about this condition may be an effective way to ensure all future doctors have sufficient ability to diagnose and treat septic patients. However, there is currently no consensus on what competencies medical students should achieve regarding sepsis recognition and treatment. This study aims to outline what sepsis-related competencies medical students should achieve by the end of their medical student training in both high or upper-middle incomes countries/regions and in low or lower-middle income countries/regions., Methods: Two separate panels from high or upper-middle income and low or lower-middle income countries/regions participated in a Delphi method to suggest and rank sepsis competencies for medical students. Each panel consisted of 13-18 key stakeholders of medical education and doctors in specialties where sepsis is a common problem (both specialists and trainees). Panelists came from all continents, except Antarctica., Results: The panels reached consensus on 38 essential sepsis competencies in low or lower-middle income countries/regions and 33 in high or upper-middle incomes countries/regions. These include competencies such as definition of sepsis and septic shock and urgency of antibiotic treatment. In the low or lower-middle income countries/regions group, consensus was also achieved for competencies ranked as very important, and was achieved in 4/5 competencies rated as moderately important. In the high or upper-middle incomes countries/regions group, consensus was achieved in 41/57 competencies rated as very important but only 6/11 competencies rated as moderately important., Conclusion: Medical schools should consider developing curricula to address essential competencies, as a minimum, but also consider addressing competencies rated as very or moderately important., (© 2024. The Author(s).)
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- 2024
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19. Pregnancy Outcomes Among Teenagers at a National Referral Hospital in Uganda.
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Kagawa MN, Owori OA, and Nakalembe M
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Introduction: Teenage pregnancy is a global public health challenge, and it is a major contributor to the high maternal and neonatal morbidity and mortality rates reported in sub-Saharan Africa and Uganda. However, there is a paucity of data regarding pregnancy outcomes and their associated factors among teenagers in Uganda. The purpose of this study was to determine the prevalence and factors associated with pregnancy outcomes among teenagers who delivered at a National Referral Hospital in Kampala, Uganda. Materials and Methods: This cross-sectional study was conducted among teenage mothers who delivered at a National Referral Hospital in Kampala, Uganda. Consecutive participant recruitment was done for those who fulfilled the eligibility criteria. The outcomes of interest included adverse maternal outcome with obstructed labor being used as a proxy and adverse fetal outcomes with birth asphyxia used as a proxy. Logistic regression analysis was used to determine the association between independent and dependent variables with a 5% level of statistical significance ( α = 0.05). Results: Teenage pregnancy was associated with adverse maternal outcomes which included obstructed labor (18%) and preterm labor (5.5%). There were no maternal deaths during the study period. Adverse fetal outcomes observed in this study population included low birth weight (83%), birth asphyxia (18%), and stillbirth (4%). The only factor associated with adverse maternal outcome was gestational age where teenage mothers had 4 times likelihood of delivering before 37 weeks. Relatedly, teenage mothers had an 81% chance of having a preterm birth. Conclusion: Teenage pregnancy was generally not associated with adverse maternal or fetal outcomes except for preterm birth. The reasons for adverse pregnancy outcomes may reflect a combination of gynecological and biological immaturity, as well as adverse socioeconomic pressures., Competing Interests: The authors declare no conflicts of interest., (Copyright © 2024 Mike Nantamu Kagawa et al.)
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- 2024
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20. Baseline knowledge on risk factors, symptoms and intended behavior of women and men towards screening and treatment of cervical cancer in rural Uganda: a cross-sectional study.
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Nakisige C, de Fouw M, Nakalembe M, Orem J, Atukonyera D, Musheshe M, Koot J, de Zeeuw J, Beltman J, and Stekelenburg J
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- Female, Male, Humans, Cross-Sectional Studies, Uganda epidemiology, Health Knowledge, Attitudes, Practice, Risk Factors, Mass Screening, Early Detection of Cancer, Uterine Cervical Neoplasms diagnosis, Uterine Cervical Neoplasms epidemiology, Uterine Cervical Neoplasms prevention & control
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Background: Knowledge of risk factors and symptoms of cervical cancer has been found to promote uptake of screening of cervical cancer. Most interventions targeted women without much involvement of men (husbands/decision makers) who are often decision makers in many low- and middle-income countries. This study aimed at assessing baseline knowledge and intended behavior of both women and men to enable design specific targeted messages to increase uptake of cervical cancer screening and promote early detection of women with symptoms., Methods: This cross-sectional study was conducted in two districts in Western Uganda using the modified African Women Awareness of CANcer (AWACAN) questionnaire. Women aged 30-49 years and their husbands/decision makers were interviewed. Knowledge on risk factors and symptoms, intended behavior and barriers towards participation in cervical cancer screening and treatment were assessed. Descriptive and logistic regression analyses were done to establish the association between knowledge levels and other factors comparing women to men., Results: A total of 724 women and 692 men were enrolled. Of these, 71.0% women and 67.2% men had ever heard of cervical cancer and 8.8% women had ever been screened. Knowledge of risk factors and symptoms of cervical cancer was high and similar for both women and men. Lack of decision making by women was associated with low knowledge of risk factors (X
2 = 14.542; p = 0.01), low education (X2 = 36.05, p < 0.01) and older age (X2 = 17.33, p < 0.01). Men had better help seeking behavior than women (X2 = 64.96, p < 0.01, OR = 0.39, 95% CI: 0.31-0.50) and were more confident and skilled in recognising a sign or symptom of cervical cancer (X2 = 27.28, p < 0.01, OR = 0.52, CI (0.40-0.67)., Conclusion: The baseline knowledge for cervical cancer was high in majority of participants and similar in both women and men. Their intended behavior towards screening was also positive but screening uptake was very low. This study suggests developing messages on multiple interventions to promote screening behavior in addition to education, consisting of male involvement, women empowerment and making services available, accessible and women friendly., (© 2024. The Author(s).)- Published
- 2024
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21. Low-cost, chromatic confocal endomicroscope for cellular imaging in vivo .
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Kulkarni N, Masciola A, Nishant A, Kim KJ, Choi H, Gmitro A, Freeman EE, Semeere A, Nakalembe M, and Kang D
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We have developed a low-cost, chromatic confocal endomicroscope (CCE) that can image a cross-section of the tissue at cellular resolution. In CCE, a custom miniature objective lens was used to focus different wavelengths into different tissue depths. Therefore, each tissue depth was encoded with the wavelength. A custom miniature spectrometer was used to spectrally-disperse light reflected from the tissue and generate cross-sectional confocal images. The CCE prototype had a diameter of 9.5 mm and a length of 68 mm. Measured resolution was high, 2 µm and 4 µm for lateral and axial directions, respectively. Effective field size was 468 µm. Preliminary results showed that CCE can visualize cellular details from cross-sections of the tissue in vivo down to the tissue depth of 100 µm., Competing Interests: NK and DK are the inventors of the patent application related to the confocal endoscopy technology presented in this paper. The University of Arizona has a technology-licensing agreement with ArgosMD on the presented technology. NK and DK have the rights to receive royalties as a result of this licensing agreement. DK serves as a scientific advisor to ArgosMD., (© 2021 Optical Society of America under the terms of the OSA Open Access Publishing Agreement.)
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- 2021
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22. Correction to: Cost of hospital care of women with postpartum haemorrhage in India, Kenya, Nigeria and Uganda: a financial case for improved prevention.
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Theunissen F, Cleps I, Goudar S, Qureshi Z, Owa OO, Mugerwa K, Piaggio G, Gülmezoglu AM, Nakalembe M, Byamugisha J, Osoti A, Mandeep S, Poriot T, Gwako G, Vernekar S, and Widmer M
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- 2021
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23. Cost of hospital care of women with postpartum haemorrhage in India, Kenya, Nigeria and Uganda: a financial case for improved prevention.
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Theunissen F, Cleps I, Goudar S, Qureshi Z, Owa OO, Mugerwa K, Piaggio G, Gülmezoglu AM, Nakalembe M, Byamugisha J, Osoti A, Mandeep S, Poriot T, Gwako G, Vernekar S, and Widmer M
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- Adult, Female, Health Services Accessibility, Hospitals, Humans, Kenya, Oxytocics economics, Oxytocin analogs & derivatives, Postpartum Hemorrhage economics, Pregnancy, Uganda, Health Care Costs, Oxytocics therapeutic use, Postpartum Hemorrhage drug therapy, Postpartum Hemorrhage prevention & control
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Objective: Access to quality, effective lifesaving uterotonics in low and middle-income countries (LMICs) remains a major barrier to reducing maternal deaths from postpartum haemorrhage (PPH). Our objective was to assess the costs of care for women who receive different preventative uterotonics, and with PPH and no-PPH so that the differences, if significant, can inform better resource allocation for maternal health care., Methods: The costs of direct hospital care of women who received oxytocin or heat-stable carbetocin for prevention of PPH in selected tertiary care facilities in India, Kenya, Nigeria, and Uganda were assessed. We collected data from all women who had PPH, as well as a random sample of women without PPH. Cost data was collected for the cost of stay, PPH interventions, transfusions and medications for 2966 women. We analyzed the difference in cost of care at a facility level between women who experienced a PPH event and those who did not. Key findings The mean cost of care of a woman experiencing PPH in the study sites in India, Kenya, Nigeria, and Uganda exceeded the cost of care of a woman who did not experience PPH by between 21% and 309%. There was a large variation in cost across hospitals within a country and across countries., Conclusion: Our results quantify the increased cost of PPH of up to 4.1 times that for a birth without PPH. PPH cost information can help countries to evaluate options across different conditions and in the formulation of appropriate guidelines for intrapartum care, including rational selection of quality-assured, effective medicines. This information can be applied to national assessment and adaptation of international recommendations such as the World Health Organization's recommendations on uterotonics for the prevention of PPH or other interventions used to treat PPH. Trial registration HRP Trial A65870; UTN U1111-1162-8519; ACTRN12614000870651; CTRI/2016/05/006969, EUDRACT 2014-004445-26. Date of registration 14 August 2014 Access to quality, effective lifesaving medicines in low and middle-income countries remains a major barrier to reducing maternal deaths from bleeding after childbirth. Information on to what extent treatments for bleeding increases the cost of care of women after childbirth is important for informed resource allocation. We collected data from all women who had bleeding after childbirth, as well as a random sample of women without bleeding in selected hospitals in India, Kenya, Nigeria, and Uganda. Cost data was collected for the cost of stay and interventions to manage bleeding for 2966 women. We compared the difference in cost of care between women who experienced a bleeding event and those who did not. The mean cost of care of a woman with bleeding in the study sites exceeded the cost of care of a woman who did not experience PPH by between 21% and 309%. There was a large variation in cost across hospitals within a country and across countries. Our results indicate an increased cost of bleeding of up to 4.1 times that for birth without bleeding. Effective prevention reduces the cost of care. Cost information can help countries to evaluate options across different conditions and in the formulation of appropriate guidelines for intrapartum care, including rational selection of quality-assured, effective medicines. This information can be applied to national assessment and adaptation of international recommendations such as the World Health Organization's recommendations on medications for the prevention of bleeding after childbirth or other interventions used to treat bleeding.
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- 2021
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24. Surgical candidacy and treatment initiation among women with cervical cancer at public referral hospitals in Kampala, Uganda: a descriptive cohort study.
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Swanson M, Nakalembe M, Chen LM, Ueda S, Namugga J, Nakisige C, and Huchko MJ
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- Adult, Chemotherapy, Adjuvant, Cohort Studies, Female, Hospitals, Humans, Hysterectomy, Neoplasm Staging, Radiotherapy, Adjuvant, Referral and Consultation, Uganda epidemiology, Uterine Cervical Neoplasms pathology, Uterine Cervical Neoplasms surgery
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Objectives: This study aimed to report the proportion of women with a new diagnosis of cervical cancer recommended for curative hysterectomy as well as associated factors. We also report recommended treatments by stage and patterns of treatment initiation., Design: This was an observational cohort study. Inperson surveys were followed by a phone call., Setting: Participants were recruited at the two public tertiary care referral hospitals in Kampala, Uganda., Participants: Adult women with a new diagnosis of cervical cancer were eligible: 332 were invited to participate, 268 met the criteria and enrolled, and 255 completed both surveys., Primary and Secondary Outcomes Measures: The primary outcome of interest was surgical candidacy; a secondary outcome was treatment initiation. Descriptive and multivariate statistical analyses examined the associations between predictors and outcomes. Sensitivity analyses were performed to examine outcomes in subgroups, including stage and availability of radiation., Results: Among 268 participants, 76% were diagnosed at an advanced stage (IIB-IVB). In total, 12% were recommended for hysterectomy. In adjusted analysis, living within 15 km of Kampala (OR 3.10, 95% CI 1.20 to 8.03) and prior screening (OR 2.89, 95% CI 1.22 to 6.83) were significantly associated with surgical candidacy. Radiotherapy availability was not significantly associated with treatment recommendations for early-stage disease (IA-IIA), but was associated with recommended treatment modality (chemoradiation vs primary chemotherapy) for locally advanced stage (IIB-IIIB). Most (67%) had started treatment. No demographic or health factor, treatment recommendation, or radiation availability was associated with treatment initiation. Among those recommended for hysterectomy, 55% underwent surgery. Among those who had initiated treatment, 82% started the modality that was recommended., Conclusion: Women presented to public referral centres in Kampala with mostly advanced-stage cervical cancer and few were recommended for surgery. Most were able to initiate treatment. Lack of access to radiation did not significantly increase the proportion of early-stage cancers recommended for hysterectomy., Competing Interests: Competing interests: None declared., (© Author(s) (or their employer(s)) 2020. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ.)
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- 2020
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25. Infant sex modifies associations between placental malaria and risk of malaria in infancy.
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Kakuru A, Roh ME, Kajubi R, Ochieng T, Ategeka J, Ochokoru H, Nakalembe M, Clark TD, Ruel T, Staedke SG, Chandramohan D, Havlir DV, Kamya MR, Dorsey G, and Jagannathan P
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- Adult, Artemisinins administration & dosage, Artemisinins therapeutic use, Drug Combinations, Female, Humans, Incidence, Infant, Infant, Newborn, Male, Pregnancy, Pyrimethamine administration & dosage, Pyrimethamine therapeutic use, Quinolines administration & dosage, Quinolines therapeutic use, Sulfadoxine administration & dosage, Sulfadoxine therapeutic use, Young Adult, Antimalarials administration & dosage, Antimalarials therapeutic use, Malaria, Falciparum drug therapy, Malaria, Falciparum epidemiology, Malaria, Falciparum prevention & control, Placenta Diseases drug therapy, Placenta Diseases epidemiology, Placenta Diseases parasitology, Placenta Diseases prevention & control, Pregnancy Complications, Parasitic drug therapy, Pregnancy Complications, Parasitic epidemiology, Pregnancy Complications, Parasitic prevention & control
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Background: Placental malaria (PM) has been associated with a higher risk of malaria during infancy. However, it is unclear whether this association is causal, and is modified by infant sex, and whether intermittent preventive treatment in pregnancy (IPTp) can reduce infant malaria by preventing PM., Methods: Data from a birth cohort of 656 infants born to HIV-uninfected mothers randomised to IPTp with dihydroartemisinin-piperaquine (DP) or Sulfadoxine-pyrimethamine (SP) was analysed. PM was categorized as no PM, active PM (presence of parasites), mild-moderate past PM (> 0-20% high powered fields [HPFs] with pigment), or severe past PM (> 20% HPFs with pigment). The association between PM and incidence of malaria in infants stratified by infant sex was examined. Causal mediation analysis was used to test whether IPTp can impact infant malaria incidence via preventing PM., Results: There were 1088 malaria episodes diagnosed among infants during 596.6 person years of follow-up. Compared to infants born to mothers with no PM, the incidence of malaria was higher among infants born to mothers with active PM (adjusted incidence rate ratio [aIRR] 1.30, 95% CI 1.00-1.71, p = 0.05) and those born to mothers with severe past PM (aIRR 1.28, 95% CI 0.89-1.83, p = 0.18), but the differences were not statistically significant. However, when stratifying by infant sex, compared to no PM, severe past PM was associated a higher malaria incidence in male (aIRR 2.17, 95% CI 1.45-3.25, p < 0.001), but not female infants (aIRR 0.74, 95% CI 0.46-1.20, p = 0.22). There were no significant associations between active PM or mild-moderate past PM and malaria incidence in male or female infants. Male infants born to mothers given IPTp with DP had significantly less malaria in infancy than males born to mothers given SP, and 89.7% of this effect was mediated through prevention of PM., Conclusion: PM may have more severe consequences for male infants, and interventions which reduce PM could mitigate these sex-specific adverse outcomes. More research is needed to better understand this sex-bias between PM and infant malaria risk. Trial registration ClinicalTrials.gov, NCT02793622. Registered 8 June 2016, https://clinicaltrials.gov/ct2/show/NCT02793622.
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- 2020
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26. Piperaquine Exposure Is Altered by Pregnancy, HIV, and Nutritional Status in Ugandan Women.
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Hughes E, Imperial M, Wallender E, Kajubi R, Huang L, Jagannathan P, Zhang N, Kakuru A, Natureeba P, Mwima MW, Muhindo M, Mwebaza N, Clark TD, Opira B, Nakalembe M, Havlir D, Kamya M, Rosenthal PJ, Dorsey G, Aweeka F, and Savic RM
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- Drug Combinations, Female, Humans, Molecular Diagnostic Techniques, Nucleic Acid Amplification Techniques, Nutritional Status, Pregnancy, Uganda, Antimalarials pharmacokinetics, Antimalarials therapeutic use, HIV Infections drug therapy, HIV Infections prevention & control, Quinolines pharmacokinetics, Quinolines therapeutic use
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Dihydroartemisinin-piperaquine (DHA-PQ) provides highly effective therapy and chemoprevention for malaria in pregnant African women. PQ concentrations of >10.3 ng/ml have been associated with reduced maternal parasitemia, placental malaria, and improved birth outcomes. We characterized the population pharmacokinetics (PK) of PQ in a post hoc analysis of human immunodeficiency virus (HIV)-infected and -uninfected pregnant women receiving DHA-PQ as chemoprevention every 4 or 8 weeks. The effects of covariates such as pregnancy, nutritional status (body mass index [BMI]), and efavirenz (EFV)-based antiretroviral therapy were investigated. PQ concentrations from two chemoprevention trials were pooled to create a population PK database from 274 women and 2,218 PK observations. A three-compartment model with an absorption lag best fit the data. Consistent with our prior intensive PK evaluation, pregnancy and EFV use resulted in a 72% and 61% increased PQ clearance, compared to postpartum and HIV-uninfected pregnant women, respectively. Low BMI at 28 weeks of gestation was associated with increased clearance (2% increase per unit decrease in BMI). Low-BMI women given DHA-PQ every 8 weeks had a higher prevalence of parasitemia, malaria infection, and placental malaria compared to women with higher BMIs. The reduced piperaquine exposure in women with low BMI as well as during EFV coadministration, compared to pregnant women with higher BMIs and not taking EFV, suggests that these populations could benefit from weekly instead of monthly dosing for prevention of malaria parasitemia. Simulations indicated that because of the BMI-clearance relationship, weight-based regimens would not improve protection compared to a 2,880 mg fixed-dose regimen when provided monthly. (The clinical trials described in this paper have been registered at ClinicalTrials.gov under identifiers NCT02163447 and NCT02282293.)., (Copyright © 2020 American Society for Microbiology.)
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- 2020
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27. A public health approach to cervical cancer screening in Africa through community-based self-administered HPV testing and mobile treatment provision.
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Nakalembe M, Makanga P, Kambugu A, Laker-Oketta M, Huchko MJ, and Martin J
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- Adult, Cryotherapy, Feasibility Studies, Female, Health Fairs, Humans, Middle Aged, Papillomavirus Infections therapy, Papillomavirus Infections virology, Patient Acceptance of Health Care, Patient Education as Topic, Predictive Value of Tests, Text Messaging, Uganda, Uterine Cervical Neoplasms therapy, Uterine Cervical Neoplasms virology, Young Adult, Community Health Services, Early Detection of Cancer, Mobile Health Units, Papillomaviridae isolation & purification, Papillomavirus Infections diagnosis, Rural Health Services, Specimen Handling, Uterine Cervical Neoplasms diagnosis, Vagina virology, Women's Health Services
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The World Health Organization (WHO) refers to cervical cancer as a public health problem, and sub-Saharan Africa bears the world's highest incidence. In the realm of screening, simplified WHO recommendations for low-resource countries now present an opportunity for a public health approach to this public health problem. We evaluated the feasibility of such a public health approach to cervical cancer screening that features community-based self-administered HPV testing and mobile treatment provision. In two rural districts of western-central Uganda, Village Health Team members led community mobilization for cervical cancer screening fairs in their communities, which offered self-collection of vaginal samples for high-risk human papillomavirus (hrHPV) testing. High-risk human papillomavirus-positive women were re-contacted and referred for treatment with cryotherapy by a mobile treatment unit in their community. We also determined penetrance of the mobilization campaign message by interviewing a probability sample of adult women in study communities about the fair and their attendance. In 16 communities, 2142 women attended the health fairs; 1902 were eligible for cervical cancer screening of which 1892 (99.5%) provided a self-collected vaginal sample. Among the 393 (21%) women with detectable hrHPV, 89% were successfully contacted about their results, of which 86% returned for treatment by a mobile treatment team. Most of the women in the community (93%) reported hearing about the fair, and among those who had heard of the fair, 68% attended. This public health approach to cervical cancer screening was feasible, effectively penetrated the communities, and was readily accepted by community women. The findings support further optimization and evaluation of this approach as a means of scaling up cervical cancer control in low-resource settings., (© 2020 The Authors. Cancer Medicine published by John Wiley & Sons Ltd.)
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- 2020
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28. Impact of intermittent preventive treatment of malaria in pregnancy with dihydroartemisinin-piperaquine versus sulfadoxine-pyrimethamine on the incidence of malaria in infancy: a randomized controlled trial.
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Kakuru A, Jagannathan P, Kajubi R, Ochieng T, Ochokoru H, Nakalembe M, Clark TD, Ruel T, Staedke SG, Chandramohan D, Havlir DV, Kamya MR, and Dorsey G
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- Adult, Antimalarials pharmacology, Artesunate pharmacology, Double-Blind Method, Drug Combinations, Female, Humans, Incidence, Infant, Infant, Newborn, Malaria epidemiology, Male, Pregnancy, Pyrimethamine pharmacology, Sulfadoxine pharmacology, Young Adult, Antimalarials therapeutic use, Artesunate therapeutic use, Malaria drug therapy, Malaria prevention & control, Pregnancy Complications, Parasitic drug therapy, Pregnancy Complications, Parasitic prevention & control, Pyrimethamine therapeutic use, Sulfadoxine therapeutic use
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Background: Intermittent preventive treatment of malaria during pregnancy (IPTp) with dihydroartemisinin-piperaquine (DP) significantly reduces the burden of malaria during pregnancy compared to sulfadoxine-pyrimethamine (SP), the current standard of care, but its impact on the incidence of malaria during infancy is unknown., Methods: We conducted a double-blind randomized trial to compare the incidence of malaria during infancy among infants born to HIV-uninfected pregnant women who were randomized to monthly IPTp with either DP or SP. Infants were followed for all their medical care in a dedicated study clinic, and routine assessments were conducted every 4 weeks. At all visits, infants with fever and a positive thick blood smear were diagnosed and treated for malaria. The primary outcome was malaria incidence during the first 12 months of life. All analyses were done by modified intention to treat., Results: Of the 782 women enrolled, 687 were followed through delivery from December 9, 2016, to December 5, 2017, resulting in 678 live births: 339 born to mothers randomized to SP and 339 born to those randomized to DP. Of these, 581 infants (85.7%) were followed up to 12 months of age. Overall, the incidence of malaria was lower among infants born to mothers randomized to DP compared to SP, but the difference was not statistically significant (1.71 vs 1.98 episodes per person-year, incidence rate ratio (IRR) 0.87, 95% confidence interval (CI) 0.73-1.03, p = 0.11). Stratifying by infant sex, IPTp with DP was associated with a lower incidence of malaria among male infants (IRR 0.75, 95% CI 0.58-0.98, p = 0.03) but not female infants (IRR 0.99, 95% CI 0.79-1.24, p = 0.93)., Conclusion: Despite the superiority of DP for IPTp, there was no evidence of a difference in malaria incidence during infancy in infants born to mothers who received DP compared to those born to mothers who received SP. Only male infants appeared to benefit from IPTp-DP suggesting that IPTp-DP may provide additional benefits beyond birth. Further research is needed to further explore the benefits of DP versus SP for IPTp on the health outcomes of infants., Trial Registration: ClinicalTrials.gov, NCT02793622 . Registered on June 8, 2016.
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- 2020
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29. The impact of gravidity, symptomatology and timing of infection on placental malaria.
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Tran EE, Cheeks ML, Kakuru A, Muhindo MK, Natureeba P, Nakalembe M, Ategeka J, Nayebare P, Kamya M, Havlir D, Feeney ME, Dorsey G, and Gaw SL
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- Adolescent, Adult, Double-Blind Method, Female, Gravidity, Humans, Malaria, Falciparum epidemiology, Middle Aged, Pregnancy, Pregnancy Complications, Infectious epidemiology, Uganda epidemiology, Young Adult, Malaria, Falciparum parasitology, Placenta parasitology, Pregnancy Complications, Infectious parasitology
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Background: Placental malaria is associated with increased risk of adverse perinatal outcomes. While primigravidity has been reported as a risk factor for placental malaria, little is known regarding the relationship between gravidity, symptomatology and timing of Plasmodium falciparum infection and the development of placental malaria., Methods: The aim of this study was to investigate the relationship between the development of placental malaria and gravidity, timing of infection, and presence of symptoms. This is a secondary analysis of data from a double-blind randomized control trial of intermittent preventive therapy during pregnancy in Uganda. Women were enrolled from 12 to 20 weeks gestation and followed through delivery. Exposure to malaria parasites was defined as symptomatic (fever with positive blood smear) or asymptomatic (based on molecular detection of parasitaemia done routinely every 4 weeks). The primary outcome was placental malaria diagnosed by histopathology, placental blood smear, and/or placental blood loop-mediated isothermal amplification. Multivariate analyses were performed using logistic regression models. Subgroup analysis was performed based on the presence of symptomatic malaria, gravidity, and timing of infection., Results: Of the 228 patients with documented maternal infection with malaria parasites during pregnancy, 101 (44.3%) had placental malaria. Primigravidity was strongly associated with placental malaria (aOR 8.90, 95% CI 4.34-18.2, p < 0.001), and each episode of malaria was associated with over a twofold increase in placental malaria (aOR 2.35, 95% CI 1.69-3.26, p < 0.001). Among multigravid women, the odds of placental malaria increased by 14% with each advancing week of gestation at first documented infection (aOR 1.14, 95% CI 1.02-1.27, p = 0.02). When stratified by the presence of symptoms, primigravidity was only associated with placental malaria in asymptomatic women, who had a 12-fold increase in the odds of placental malaria (aOR 12.19, 95% CI 5.23-28.43, p < 0.001)., Conclusions: Total number of P. falciparum infections in pregnancy is a significant predictor of placental malaria. The importance of timing of infection on the development of placental malaria varies based on gravidity. In primigravidas, earlier asymptomatic infections were more frequently identified in those with placental malaria, whereas in multigravidas, parasitaemias detected later in gestation were associated with placental malaria. Earlier initiation of an effective intermittent preventive therapy may help to prevent placental malaria and improve birth outcomes, particularly in primigravid women.
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- 2020
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30. Prevalence, correlates, and predictive value of high-risk human papillomavirus mRNA detection in a community-based cervical cancer screening program in western Uganda.
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Nakalembe M, Makanga P, Mubiru F, Swanson M, Martin J, and Huchko M
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Background: New strategies are needed to combat the high incidence of cervical cancer in resource-limited settings such as sub-Saharan Africa. Screening for high-risk human papillomavirus (hrHPV) DNA is sensitive for pre-cancer, but its lack of specificity results in substantial overtreatment in low resource settings where additional testing (e.g., colposcopy) is rarely available. Testing for hrHPV E6/E7 mRNA may enhance specificity, but little is known about its performance characteristics in resource-limited settings., Methods: In a series of community health fairs in rural Uganda, women aged 25 to 49 years provided self-collected vaginal samples, which were tested for hrHPV (types 16, 18, 31, 33, 35, 39, 45, 51, 52, 56, 58, 59, 66 and 68) E6/E7 mRNA with the Aptima® assay. Positive specimens underwent testing for HPV-16 and 18/45. After excluding pregnant women, all women testing positive for any hrHPV subsequently were offered cervical biopsy to determine pathology., Results: A total of 1892 women provided a vaginal sample for hrHPV testing during 24 health fairs. The median age was 34 years, HIV prevalence was 10, and 95% had not been previously screened. Prevalence of any hrHPV E6/E7 mRNA was 21% (95% confidence interval (CI): 19 to 23%); the prevalence of HPV-16 was 2.6%, HPV-18/45 1.9%, and HPV 16 and 18/45 were jointly found in 0.1% of the study population. Younger age, pregnancy and HIV-positivity were independently associated with any hrHPV infection. Of the 255 evaluable cervical biopsies, the positive predictive value of detecting any hrHPV E6/E7 mRNA for presence of cervical intraepithelial neoplasia grade 2 or higher ("CIN 2+") was 8.2% (95% CI: 5.1 to 12%). The positive predictive value associated with detection of HPV-16 mRNA (15%) or HPV-18/45 mRNA (15%) was only slightly higher., Conclusion: Among community-based women in Uganda, the prevalence of any hrHPV E6/E7 mRNA in vaginal samples was high, but the prevalence of the most oncogenic HPV types (16, 18, or 45) was substantially lower. Positive predictive value of hrHPV mRNA-positivity for CIN 2+ was also low, including when restricting to HPV 16/18/45-positivity. The findings emphasize the need to identify more specific screening approaches for cervical cancer., Competing Interests: The study was reviewed and approved by the National HIV/AIDS Research Committee, the Uganda National Council for Science and Technology (UNCST) as well as the University of California, San Francisco review board. All study participants provided written informed consent to participate in the study.The authors declare that they have no competing interests.Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.
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- 2019
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31. Monthly sulfadoxine-pyrimethamine versus dihydroartemisinin-piperaquine for intermittent preventive treatment of malaria in pregnancy: a double-blind, randomised, controlled, superiority trial.
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Kajubi R, Ochieng T, Kakuru A, Jagannathan P, Nakalembe M, Ruel T, Opira B, Ochokoru H, Ategeka J, Nayebare P, Clark TD, Havlir DV, Kamya MR, and Dorsey G
- Subjects
- Adult, Double-Blind Method, Drug Administration Schedule, Drug Combinations, Drug Therapy, Combination, Female, Humans, Malaria, Falciparum epidemiology, Pregnancy, Pregnancy Complications, Parasitic epidemiology, Pregnancy Outcome, Uganda, Young Adult, Antimalarials administration & dosage, Artemisinins administration & dosage, Malaria, Falciparum prevention & control, Pregnancy Complications, Parasitic prevention & control, Pyrimethamine administration & dosage, Quinolines administration & dosage, Sulfadoxine administration & dosage
- Abstract
Background: Intermittent treatment with sulfadoxine-pyrimethamine, recommended for prevention of malaria in pregnant women throughout sub-Saharan Africa, is threatened by parasite resistance. We assessed the efficacy and safety of intermittent preventive treatment with dihydroartemisinin-piperaquine as an alternative to sulfadoxine-pyrimethamine., Methods: We did a double-blind, randomised, controlled, superiority trial at one rural site in Uganda with high malaria transmission and sulfadoxine-pyrimethamine resistance. HIV-uninfected pregnant women between 12 and 20 weeks gestation were randomly assigned (1:1) to monthly intermittent preventive treatment during pregnancy with sulfadoxine-pyrimethamine or dihydroartemisinin-piperaquine. The primary endpoint was the risk of a composite adverse birth outcome defined as low birthweight, preterm birth, or small for gestational age in livebirths. Protective efficacy was defined as 1-prevalence ratio or 1-incidence rate ratio. All analyses were done by modified intention to treat. This trial is registered with ClinicalTrials.gov, number NCT02793622., Findings: Between Sept 6, 2016, and May 29, 2017, 782 women were enrolled and randomly assigned to receive sulfadoxine-pyrimethamine (n=391) or dihydroartemisinin-piperaquine (n=391); 666 (85·2%) women who delivered livebirths were included in the primary analysis. There was no significant difference in the risk of our composite adverse birth outcome between the dihydroartemisinin-piperaquine and sulfadoxine-pyrimethamine treatment group (54 [16%] of 337 women vs 60 [18%] of 329 women; protective efficacy 12% [95% CI -23 to 37], p=0·45). Both drug regimens were well tolerated, with no significant differences in adverse events between the groups, with the exception of asymptomatic corrected QT interval prolongation, which was significantly higher in the dihydroartemisinin-piperaquine group (mean change 13 ms [SD 23]) than in the sulfadoxine-pyrimethamine group (mean change 0 ms [SD 23]; p<0·0001)., Interpretation: Monthly intermittent preventive treatment with dihydroartemisinin-piperaquine was safe but did not lead to significant improvements in birth outcomes compared with sulfadoxine-pyrimethamine., Funding: Eunice Kennedy Shriver National Institute of Child Health and Human Development, and Bill & Melinda Gates Foundation., (Copyright © 2019 Elsevier Ltd. All rights reserved.)
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- 2019
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32. Case Report: Birth Outcome and Neurodevelopment in Placental Malaria Discordant Twins.
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Conroy AL, Bangirana P, Muhindo MK, Kakuru A, Jagannathan P, Opoka RO, Liechty EA, Nakalembe M, Kamya MR, Dorsey G, and John CC
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- Antimalarials administration & dosage, Antimalarials pharmacology, Artemisinins administration & dosage, Artemisinins pharmacology, Female, Humans, Infant, Infant, Newborn, Malaria prevention & control, Pregnancy, Pregnancy Outcome, Premature Birth, Quinolines administration & dosage, Quinolines pharmacology, Developmental Disabilities etiology, Diseases in Twins, Malaria complications, Placenta parasitology, Pregnancy Complications, Parasitic pathology
- Abstract
Maternal infection during pregnancy can have lasting effects on neurodevelopment, but the impact of malaria in pregnancy on child neurodevelopment is unknown. We present a case of a 24-year-old gravida three woman enrolled at 14 weeks 6 days of gestation in a clinical trial evaluating malaria prevention strategies in pregnancy. She had two blood samples test positive for Plasmodium falciparum using loop-mediated isothermal amplification before 20 weeks of gestation. At 31 weeks 4 days of gestation, the woman presented with preterm premature rupture of membranes, and the twins were delivered by cesarean section. Twin A was 1,920 g and Twin B was 1,320 g. Both placentas tested negative for malaria by microscopy, but the placenta of Twin B had evidence of past malaria by histology. The twins' development was assessed using the Bayley Scales of Infant and Toddler Development -Third Edition. At 1 year chronologic age, Twin B had lower scores across all domains (composite scores: cognitive, Twin A [100], Twin B [70]; motor, Twin A [88], Twin B [73]; language, Twin A [109], Twin B [86]). This effect persisted at 2 years chronologic age (composite scores: cognitive, Twin A [80], Twin B [60]; motor, Twin A [76], Twin B [67]; language, Twin A [77], Twin B [59]). Infant health was similar over the first 2 years of life. We report differences in neurodevelopmental outcomes in placental malaria-discordant dizygotic twins. Additional research is needed to evaluate the impact of placental malaria on neurodevelopmental complications. Trial registration number: ClinicalTrials.gov number, NCT02163447. Registered: June 2014, https://clinicaltrials.gov/ct2/show/NCT02163447.
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- 2019
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33. Dihydroartemisinin-piperaquine for intermittent preventive treatment of malaria during pregnancy and risk of malaria in early childhood: A randomized controlled trial.
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Jagannathan P, Kakuru A, Okiring J, Muhindo MK, Natureeba P, Nakalembe M, Opira B, Olwoch P, Nankya F, Ssewanyana I, Tetteh K, Drakeley C, Beeson J, Reiling L, Clark TD, Rodriguez-Barraquer I, Greenhouse B, Wallender E, Aweeka F, Prahl M, Charlebois ED, Feeney ME, Havlir DV, Kamya MR, and Dorsey G
- Subjects
- Adolescent, Adult, Antimalarials adverse effects, Artemisinins adverse effects, Child, Preschool, Double-Blind Method, Drug Administration Schedule, Drug Combinations, Female, Humans, Incidence, Infant, Infant, Newborn, Malaria, Falciparum epidemiology, Malaria, Falciparum parasitology, Malaria, Falciparum transmission, Pregnancy, Pregnancy Complications, Parasitic epidemiology, Pregnancy Complications, Parasitic parasitology, Pyrimethamine adverse effects, Quinolines adverse effects, Sulfadoxine adverse effects, Time Factors, Treatment Outcome, Uganda epidemiology, Young Adult, Antimalarials administration & dosage, Artemisinins administration & dosage, Infectious Disease Transmission, Vertical prevention & control, Malaria, Falciparum prevention & control, Pregnancy Complications, Parasitic prevention & control, Pyrimethamine administration & dosage, Quinolines administration & dosage, Sulfadoxine administration & dosage
- Abstract
Background: Intermittent preventive treatment of malaria in pregnancy (IPTp) with dihydroartemisinin-piperaquine (IPTp-DP) has been shown to reduce the burden of malaria during pregnancy compared to sulfadoxine-pyrimethamine (IPTp-SP). However, limited data exist on how IPTp regimens impact malaria risk during infancy. We conducted a double-blinded randomized controlled trial (RCT) to test the hypothesis that children born to mothers given IPTp-DP would have a lower incidence of malaria during infancy compared to children born to mothers who received IPTp-SP., Methods and Findings: We compared malaria metrics among children in Tororo, Uganda, born to women randomized to IPTp-SP given every 8 weeks (SP8w, n = 100), IPTp-DP every 8 weeks (DP8w, n = 44), or IPTp-DP every 4 weeks (DP4w, n = 47). After birth, children were given chemoprevention with DP every 12 weeks from 8 weeks to 2 years of age. The primary outcome was incidence of malaria during the first 2 years of life. Secondary outcomes included time to malaria from birth and time to parasitemia following each dose of DP given during infancy. Results are reported after adjustment for clustering (twin gestation) and potential confounders (maternal age, gravidity, and maternal parasitemia status at enrolment).The study took place between June 2014 and May 2017. Compared to children whose mothers were randomized to IPTp-SP8w (0.24 episodes per person year [PPY]), the incidence of malaria was higher in children born to mothers who received IPTp-DP4w (0.42 episodes PPY, adjusted incidence rate ratio [aIRR] 1.92; 95% CI 1.00-3.65, p = 0.049) and nonsignificantly higher in children born to mothers who received IPT-DP8w (0.30 episodes PPY, aIRR 1.44; 95% CI 0.68-3.05, p = 0.34). However, these associations were modified by infant sex. Female children whose mothers were randomized to IPTp-DP4w had an apparently 4-fold higher incidence of malaria compared to female children whose mothers were randomized to IPTp-SP8w (0.65 versus 0.20 episodes PPY, aIRR 4.39, 95% CI 1.87-10.3, p = 0.001), but no significant association was observed in male children (0.20 versus 0.28 episodes PPY, aIRR 0.66, 95% CI 0.25-1.75, p = 0.42). Nonsignificant increases in malaria incidence were observed among female, but not male, children born to mothers who received DP8w versus SP8w. In exploratory analyses, levels of malaria-specific antibodies in cord blood were similar between IPTp groups and sex. However, female children whose mothers were randomized to IPTp-DP4w had lower mean piperaquine (PQ) levels during infancy compared to female children whose mothers received IPTp-SP8w (coef 0.81, 95% CI 0.65-1.00, p = 0.048) and male children whose mothers received IPTp-DP4w (coef 0.72, 95% CI 0.57-0.91, p = 0.006). There were no significant sex-specific differences in PQ levels among children whose mothers were randomized to IPTp-SP8w or IPTp-DP8w. The main limitations were small sample size and childhood provision of DP every 12 weeks in infancy., Conclusions: Contrary to our hypothesis, preventing malaria in pregnancy with IPTp-DP in the context of chemoprevention with DP during infancy does not lead to a reduced incidence of malaria in childhood; in this setting, it may be associated with an increased incidence of malaria in females. Future studies are needed to better understand the biological mechanisms of in utero drug exposure on drug metabolism and how this may affect the dosing of antimalarial drugs for treatment and prevention during infancy., Trial Registration: ClinicalTrials.gov number NCT02163447., Competing Interests: I have read the journal's policy and the authors of this manuscript have the following competing interests: (1) EC declared NIH research grants to institution; (2) DVH declared that they received grant funding from NIH. For studies outside of submitted work, they received antiretroviral therapy for NIH funded study from Gilead Sciences; (3) JB is a member of the Editorial Board of PLOS Medicine.
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- 2018
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34. Multiple-level stakeholder engagement in malaria clinical trials: addressing the challenges of conducting clinical research in resource-limited settings.
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Mtove G, Kimani J, Kisinza W, Makenga G, Mangesho P, Duparc S, Nakalembe M, Phiri KS, Orrico R, Rojo R, and Vandenbroucke P
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- Family, Health Resources, Humans, Informed Consent, International Cooperation, Clinical Trials as Topic, Malaria prevention & control, Stakeholder Participation
- Abstract
Background: Multinational clinical trials are logistically complex and require close coordination between various stakeholders. They must comply with global clinical standards and are accountable to multiple regulatory and ethical bodies. In resource-limited settings, it is challenging to understand how to apply global clinical standards to international, national, and local factors in clinical trials, making multiple-level stakeholder engagement an important element in the successful conduct of these clinical trials., Main Body: During the planning and implementation of a large multinational clinical trial for intermittent preventive treatment of malaria in pregnancy in resource-limited areas of sub-Saharan Africa, we encountered numerous challenges, which required implementation of a range of engagement measures to ensure compliance with global clinical and regulatory standards. These challenges included coordination with ongoing global malaria efforts, heterogeneity in national regulatory structures, sub-optimal healthcare infrastructure, local practices and beliefs, and perspectives that view healthcare providers with undue trust or suspicion. In addition to engagement with international bodies, such as the World Health Organization, the Malaria in Pregnancy Consortium, the Steve Biko Centre for Bioethics, and the London School of Hygiene and Tropical Medicine, in order to address the challenges just described, Pfizer Inc. and Medicines for Malaria Venture (the "Sponsoring Entities" for these studies) and investigators liaised with national- and district-level stakeholders such as health ministers and regional/local community health workers. Community engagement measures undertaken by investigators included local meetings with community leaders to explain the research aims and answer questions and concerns voiced by the community. The investigators also engaged with family members of prospective trial participants in order to be sensitive to local practices and beliefs., Conclusion: Engagement with key stakeholders at international and national levels enabled the Sponsoring Entities to address challenges by aligning the study design with the requirements of health and regulatory agencies and to understand and address healthcare infrastructure needs prior to trial initiation. Local stakeholder engagement, including community members, study participants, and family enabled the investigators to address challenges by ensuring that study design and conduct were adapted to local considerations and ensuring accurate information about the study aims was shared with the public., Trial Registration: ClinicalTrials.gov, ID: NCT01103063 . Registered on 7 April 2010.
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- 2018
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35. Predicting Optimal Dihydroartemisinin-Piperaquine Regimens to Prevent Malaria During Pregnancy for Human Immunodeficiency Virus-Infected Women Receiving Efavirenz.
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Wallender E, Vucicevic K, Jagannathan P, Huang L, Natureeba P, Kakuru A, Muhindo M, Nakalembe M, Havlir D, Kamya M, Aweeka F, Dorsey G, Rosenthal PJ, and Savic RM
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- Adult, Alkynes, Anti-HIV Agents administration & dosage, Anti-HIV Agents therapeutic use, Antimalarials administration & dosage, Artemisinins administration & dosage, Benzoxazines administration & dosage, Benzoxazines therapeutic use, Cyclopropanes, Dose-Response Relationship, Drug, Drug Therapy, Combination, Female, HIV Infections drug therapy, Humans, Pregnancy, Quinolines administration & dosage, Young Adult, Antimalarials therapeutic use, Artemisinins therapeutic use, HIV Infections complications, Malaria, Falciparum prevention & control, Pregnancy Complications, Parasitic prevention & control, Quinolines therapeutic use
- Abstract
Background: A monthly treatment course of dihydroartemisinin-piperaquine (DHA-PQ) effectively prevents malaria during pregnancy. However, a drug-drug interaction pharmacokinetic (PK) study found that pregnant human immunodeficiency virus (HIV)-infected women receiving efavirenz-based antiretroviral therapy (ART) had markedly reduced piperaquine (PQ) exposure. This suggests the need for alternative DHA-PQ chemoprevention regimens in this population., Methods: Eighty-three HIV-infected pregnant women who received monthly DHA-PQ and efavirenz contributed longitudinal PK and corrected QT interval (QTc) (n = 25) data. Population PK and PK-QTc models for PQ were developed to consider the benefits (protective PQ coverage) and risks (QTc prolongation) of alternative DHA-PQ chemoprevention regimens. Protective PQ coverage was defined as maintaining a concentration >10 ng/mL for >95% of the chemoprevention period., Results: PQ clearance was 4540 L/day. With monthly DHA-PQ (2880 mg PQ), <1% of women achieved defined protective PQ coverage. Weekly (960 mg PQ) or low-dose daily (320 or 160 mg PQ) regimens achieved protective PQ coverage for 34% and >96% of women, respectively. All regimens were safe, with ≤2% of women predicted to have ≥30 msec QTc increase., Conclusions: For HIV-infected pregnant women receiving efavirenz, low daily DHA-PQ dosing was predicted to improve protection against parasitemia and reduce risk of toxicity compared to monthly dosing., Clinical Trials Registration: NCT02282293., (© The Author(s) 2017. Published by Oxford University Press for the Infectious Diseases Society of America. All rights reserved. For permissions, e-mail: journals.permissions@oup.com.)
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- 2018
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36. Progression of the first stage of spontaneous labour: A prospective cohort study in two sub-Saharan African countries.
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Oladapo OT, Souza JP, Fawole B, Mugerwa K, Perdoná G, Alves D, Souza H, Reis R, Oliveira-Ciabati L, Maiorano A, Akintan A, Alu FE, Oyeneyin L, Adebayo A, Byamugisha J, Nakalembe M, Idris HA, Okike O, Althabe F, Hundley V, Donnay F, Pattinson R, Sanghvi HC, Jardine JE, Tunçalp Ö, Vogel JP, Stanton ME, Bohren M, Zhang J, Lavender T, Liljestrand J, Ten Hoope-Bender P, Mathai M, Bahl R, and Gülmezoglu AM
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- Adult, Female, Humans, Labor Stage, First physiology, Nigeria, Pregnancy, Prospective Studies, Uganda, Young Adult, Labor, Obstetric physiology
- Abstract
Background: Escalation in the global rates of labour interventions, particularly cesarean section and oxytocin augmentation, has renewed interest in a better understanding of natural labour progression. Methodological advancements in statistical and computational techniques addressing the limitations of pioneer studies have led to novel findings and triggered a re-evaluation of current labour practices. As part of the World Health Organization's Better Outcomes in Labour Difficulty (BOLD) project, which aimed to develop a new labour monitoring-to-action tool, we examined the patterns of labour progression as depicted by cervical dilatation over time in a cohort of women in Nigeria and Uganda who gave birth vaginally following a spontaneous labour onset., Methods and Findings: This was a prospective, multicentre, cohort study of 5,606 women with singleton, vertex, term gestation who presented at ≤ 6 cm of cervical dilatation following a spontaneous labour onset that resulted in a vaginal birth with no adverse birth outcomes in 13 hospitals across Nigeria and Uganda. We independently applied survival analysis and multistate Markov models to estimate the duration of labour centimetre by centimetre until 10 cm and the cumulative duration of labour from the cervical dilatation at admission through 10 cm. Multistate Markov and nonlinear mixed models were separately used to construct average labour curves. All analyses were conducted according to three parity groups: parity = 0 (n = 2,166), parity = 1 (n = 1,488), and parity = 2+ (n = 1,952). We performed sensitivity analyses to assess the impact of oxytocin augmentation on labour progression by re-examining the progression patterns after excluding women with augmented labours. Labour was augmented with oxytocin in 40% of nulliparous and 28% of multiparous women. The median time to advance by 1 cm exceeded 1 hour until 5 cm was reached in both nulliparous and multiparous women. Based on a 95th percentile threshold, nulliparous women may take up to 7 hours to progress from 4 to 5 cm and over 3 hours to progress from 5 to 6 cm. Median cumulative duration of labour indicates that nulliparous women admitted at 4 cm, 5 cm, and 6 cm reached 10 cm within an expected time frame if the dilatation rate was ≥ 1 cm/hour, but their corresponding 95th percentiles show that labour could last up to 14, 11, and 9 hours, respectively. Substantial differences exist between actual plots of labour progression of individual women and the 'average labour curves' derived from study population-level data. Exclusion of women with augmented labours from the study population resulted in slightly faster labour progression patterns., Conclusions: Cervical dilatation during labour in the slowest-yet-normal women can progress more slowly than the widely accepted benchmark of 1 cm/hour, irrespective of parity. Interventions to expedite labour to conform to a cervical dilatation threshold of 1 cm/hour may be inappropriate, especially when applied before 5 cm in nulliparous and multiparous women. Averaged labour curves may not truly reflect the variability associated with labour progression, and their use for decision-making in labour management should be de-emphasized.
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- 2018
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37. Relationships between infection with Plasmodium falciparum during pregnancy, measures of placental malaria, and adverse birth outcomes.
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Kapisi J, Kakuru A, Jagannathan P, Muhindo MK, Natureeba P, Awori P, Nakalembe M, Ssekitoleko R, Olwoch P, Ategeka J, Nayebare P, Clark TD, Rizzuto G, Muehlenbachs A, Havlir DV, Kamya MR, Dorsey G, and Gaw SL
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- Adolescent, Adult, Female, Humans, Infant, Low Birth Weight, Infant, Newborn, Malaria, Falciparum complications, Malaria, Falciparum parasitology, Parasitemia parasitology, Pregnancy, Pregnancy Complications, Infectious parasitology, Premature Birth parasitology, Prevalence, Uganda epidemiology, Young Adult, Malaria, Falciparum epidemiology, Placenta parasitology, Plasmodium falciparum physiology, Pregnancy Complications, Infectious epidemiology, Premature Birth epidemiology
- Abstract
Background: Malaria in pregnancy has been associated with maternal morbidity, placental malaria, and adverse birth outcomes. However, data are limited on the relationships between longitudinal measures of malaria during pregnancy, measures of placental malaria, and birth outcomes., Methods: This is a nested observational study of data from a randomized controlled trial of intermittent preventive therapy during pregnancy among 282 participants with assessment of placental malaria and delivery outcomes. HIV-uninfected pregnant women were enrolled at 12-20 weeks of gestation. Symptomatic malaria during pregnancy was measured using passive surveillance and monthly detection of asymptomatic parasitaemia using loop-mediated isothermal amplification (LAMP). Placental malaria was defined as either the presence of parasites in placental blood by microscopy, detection of parasites in placental blood by LAMP, or histopathologic evidence of parasites or pigment. Adverse birth outcomes assessed included low birth weight (LBW), preterm birth (PTB), and small for gestational age (SGA) infants., Results: The 282 women were divided into three groups representing increasing malaria burden during pregnancy. Fifty-two (18.4%) had no episodes of symptomatic malaria or asymptomatic parasitaemia during the pregnancy, 157 (55.7%) had low malaria burden (0-1 episodes of symptomatic malaria and < 50% of samples LAMP+), and 73 (25.9%) had high malaria burden during pregnancy (≥ 2 episodes of symptomatic malaria or ≥ 50% of samples LAMP+). Women with high malaria burden had increased risks of placental malaria by blood microscopy and LAMP [aRR 14.2 (1.80-111.6) and 4.06 (1.73-9.51), respectively], compared to the other two groups combined. Compared with women with no malaria exposure during pregnancy, the risk of placental malaria by histopathology was higher among low and high burden groups [aRR = 3.27 (1.32-8.12) and aRR = 7.07 (2.84-17.6), respectively]. Detection of placental parasites by any method was significantly associated with PTB [aRR 5.64 (1.46-21.8)], and with a trend towards increased risk for LBW and SGA irrespective of the level of malaria burden during pregnancy., Conclusion: Higher malaria burden during pregnancy was associated with placental malaria and together with the detection of parasites in the placenta were associated with increased risk for adverse birth outcomes. Trial Registration Current Controlled Trials Identifier NCT02163447.
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- 2017
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38. Intermittent Preventive Treatment With Dihydroartemisinin-Piperaquine for the Prevention of Malaria Among HIV-Infected Pregnant Women.
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Natureeba P, Kakuru A, Muhindo M, Ochieng T, Ategeka J, Koss CA, Plenty A, Charlebois ED, Clark TD, Nzarubara B, Nakalembe M, Cohan D, Rizzuto G, Muehlenbachs A, Ruel T, Jagannathan P, Havlir DV, Kamya MR, and Dorsey G
- Subjects
- Adult, Double-Blind Method, Endpoint Determination, Female, Follow-Up Studies, Humans, Incidence, Pregnancy, Treatment Outcome, Trimethoprim, Sulfamethoxazole Drug Combination therapeutic use, Uganda, Young Adult, Antimalarials therapeutic use, Artemisinins therapeutic use, HIV Infections parasitology, Malaria prevention & control, Pregnancy Complications, Infectious prevention & control, Quinolines therapeutic use
- Abstract
Background: Daily trimethoprim-sulfamethoxazole (TMP-SMX) and insecticide-treated nets remain the main interventions for prevention of malaria in human immunodeficiency virus (HIV)-infected pregnant women in Africa. However, antifolate and pyrethroid resistance threaten the effectiveness of these interventions, and new ones are needed., Methods: We conducted a double-blinded, randomized, placebo-controlled trial comparing daily TMP-SMX plus monthly dihydroartemisinin-piperaquine (DP) to daily TMP-SMX alone in HIV-infected pregnant women in an area of Uganda where indoor residual spraying of insecticide had recently been implemented. Participants were enrolled between gestation weeks 12 and 28 and given an insecticide-treated net. The primary outcome was detection of active or past placental malarial infection by histopathologic analysis. Secondary outcomes included incidence of malaria, parasite prevalence, and adverse birth outcomes., Result: All 200 women enrolled were followed through delivery, and the primary outcome was assessed in 194. There was no statistically significant difference in the risk of histopathologically detected placental malarial infection between the daily TMP-SMX plus DP arm and the daily TMP-SMX alone arm (6.1% vs. 3.1%; relative risk, 1.96; 95% confidence interval, .50-7.61; P = .50). Similarly, there were no differences in secondary outcomes., Conclusions: Among HIV-infected pregnant women in the setting of indoor residual spraying of insecticide, adding monthly DP to daily TMP-SMX did not reduce the risk of placental or maternal malaria or improve birth outcomes., Clinical Trials Registration: NCT02282293., (Copyright © 2017 European Crohn's and Colitis Organisation (ECCO). Published by Oxford University Press. All rights reserved. For permissions, please email: journals.permissions@oup.com)
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- 2017
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39. HRP2 and pLDH-Based Rapid Diagnostic Tests, Expert Microscopy, and PCR for Detection of Malaria Infection during Pregnancy and at Delivery in Areas of Varied Transmission: A Prospective Cohort Study in Burkina Faso and Uganda.
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Kyabayinze DJ, Zongo I, Cunningham J, Gatton M, Angutoko P, Ategeka J, Compaoré YD, Muehlenbachs A, Mulondo J, Nakalembe M, Somé FA, Ouattara A, Rouamba N, Ouédraogo JB, Hopkins H, and Bell D
- Subjects
- Adult, Antigens, Protozoan genetics, Burkina Faso, Diagnostic Tests, Routine statistics & numerical data, Female, Follow-Up Studies, Host-Parasite Interactions, Humans, Infant, Newborn, L-Lactate Dehydrogenase genetics, Malaria, Falciparum diagnosis, Malaria, Falciparum transmission, Microscopy methods, Plasmodium falciparum genetics, Plasmodium falciparum metabolism, Point-of-Care Systems, Polymerase Chain Reaction methods, Pregnancy, Pregnancy Trimester, Second, Pregnancy Trimester, Third, Prenatal Care statistics & numerical data, Prospective Studies, Protozoan Proteins genetics, Reproducibility of Results, Seasons, Sensitivity and Specificity, Uganda, Young Adult, Antigens, Protozoan metabolism, Diagnostic Tests, Routine methods, L-Lactate Dehydrogenase metabolism, Malaria, Falciparum parasitology, Plasmodium falciparum physiology, Protozoan Proteins metabolism
- Abstract
Background: Intermittent screening and treatment (IST) of malaria during pregnancy has been proposed as an alternative to intermittent preventive treatment in pregnancy (IPTp), where IPTp is failing due to drug resistance. However, the antenatal parasitaemias are frequently very low, and the most appropriate screening test for IST has not been defined., Methodology/principal Findings: We conducted a multi-center prospective study of 990 HIV-uninfected women attending ANC in two different malaria transmission settings at Tororo District Hospital, eastern Uganda and Colsama Health Center in western Burkina Faso. Women were enrolled in the study in the second or third trimester of pregnancy and followed to delivery, generating 2,597 blood samples for analysis. Screening tests included rapid diagnostic tests (RDTs) targeting histidine-rich protein 2 (HRP2) and parasite lactate dehydrogenase (pLDH) and microscopy, compared to nPCR as a reference standard. At enrolment, the proportion of pregnant women who were positive for P. falciparum by HRP2/pan pLDH RDT, Pf pLDH/pan pLDH RDT, microscopy and PCR was 38%, 29%, 36% and 44% in Uganda and 21%, 16%, 15% and 35% in Burkina Faso, respectively. All test positivity rates declined during follow-up. In comparison to PCR, the sensitivity of the HRP2/pan pLDH RDT, Pf pLDH/pan pLDH RDT and microscopy was 75.7%, 60.1% and 69.7% in Uganda, 55.8%, 42.6% and 55.8% in Burkina Faso respectively for all antenatal visits. Specificity was greater than 96% for all three tests. Comparison of accuracy using generalized estimating equation revealed that the HRP2- detecting RDT was the most accurate test in both settings., Conclusions/significance: The study suggests that HRP2-based RDTs are the most appropriate point-of-care test currently available for use during pregnancy especially for symptomatic women, but will still miss some PCR-positive women. The clinical significance of these very low density infections needs to be better defined.
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- 2016
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40. Acceptability of study procedures (self-collected introital swabs, blood draws and stool sample collection) by students 10-16 years for an HPV vaccine effectiveness study: a pilot study.
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Nakalembe M, Mutyaba T, and Mirembe F
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- Adolescent, Child, Demography, Female, Focus Groups, Humans, Interviews as Topic, Pilot Projects, Vaccination, Feces virology, Papillomavirus Vaccines immunology, Patient Acceptance of Health Care, Specimen Handling methods, Students
- Abstract
Background: A cohort study was planned to evaluate vaccine immunogenicity and effect of malaria and helminth co-infections on the bivalent Human papilloma virus (HPV) vaccine. The study would involve self collected introital swabs, blood draws and stool sample collection. We therefore conducted a pilot study to assess the acceptability of these procedures among the students and their parents., Results: A cross-sectional study among forty four students from two purposively selected primary schools of Western Uganda. Exit interviews and two focus group discussions (FGD) (for parents) were conducted. Acceptability was measured by willingness to undergo the procedures again, recommending the procedures to others as well as proportion of introital swabs positive for β globulin. FGD determined acceptability of the parents and explored opinions and perceptions that would influence their decisions. HPV-16/18 and β globulin deoxyribonucleic acid (DNA) were analysed using a polymerase chain reaction (PCR) kit. All the students (100%) in the study were willing to provide a self- collected introital swab and a stool sample as well as recommending their friends while (86.3%) were willing for blood draws. There were 40/44 (90.1%) self collected introital swabs that had positive result for human β globulin though none of them was positive for HPV-16/18. In the FGD, it emerged that parents concerns were on the blood draws and introital swab collection which were addressed., Conclusions: The study procedures were highly acceptable among this study population of students and their parents. Follow-up to assess HPV vaccine effectiveness and factors that may influence the vaccine in this age group is feasible.
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- 2016
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41. Dihydroartemisinin-Piperaquine for the Prevention of Malaria in Pregnancy.
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Kakuru A, Jagannathan P, Muhindo MK, Natureeba P, Awori P, Nakalembe M, Opira B, Olwoch P, Ategeka J, Nayebare P, Clark TD, Feeney ME, Charlebois ED, Rizzuto G, Muehlenbachs A, Havlir DV, Kamya MR, and Dorsey G
- Subjects
- Adolescent, Adult, Antimalarials adverse effects, Artemisinins adverse effects, Double-Blind Method, Drug Administration Schedule, Drug Combinations, Drug Resistance, Female, Humans, Incidence, Malaria epidemiology, Parasitemia epidemiology, Pregnancy, Pregnancy Outcome, Pyrimethamine adverse effects, Quinolines adverse effects, Sulfadoxine adverse effects, Uganda, Vomiting chemically induced, Young Adult, Antimalarials therapeutic use, Artemisinins administration & dosage, Malaria prevention & control, Pregnancy Complications, Parasitic prevention & control, Pyrimethamine therapeutic use, Quinolines administration & dosage, Sulfadoxine therapeutic use
- Abstract
Background: Intermittent treatment with sulfadoxine-pyrimethamine is widely recommended for the prevention of malaria in pregnant women in Africa. However, with the spread of resistance to sulfadoxine-pyrimethamine, new interventions are needed., Methods: We conducted a double-blind, randomized, controlled trial involving 300 human immunodeficiency virus (HIV)-uninfected pregnant adolescents or women in Uganda, where sulfadoxine-pyrimethamine resistance is widespread. We randomly assigned participants to a sulfadoxine-pyrimethamine regimen (106 participants), a three-dose dihydroartemisinin-piperaquine regimen (94 participants), or a monthly dihydroartemisinin-piperaquine regimen (100 participants). The primary outcome was the prevalence of histopathologically confirmed placental malaria., Results: The prevalence of histopathologically confirmed placental malaria was significantly higher in the sulfadoxine-pyrimethamine group (50.0%) than in the three-dose dihydroartemisinin-piperaquine group (34.1%, P=0.03) or the monthly dihydroartemisinin-piperaquine group (27.1%, P=0.001). The prevalence of a composite adverse birth outcome was lower in the monthly dihydroartemisinin-piperaquine group (9.2%) than in the sulfadoxine-pyrimethamine group (18.6%, P=0.05) or the three-dose dihydroartemisinin-piperaquine group (21.3%, P=0.02). During pregnancy, the incidence of symptomatic malaria was significantly higher in the sulfadoxine-pyrimethamine group (41 episodes over 43.0 person-years at risk) than in the three-dose dihydroartemisinin-piperaquine group (12 episodes over 38.2 person-years at risk, P=0.001) or the monthly dihydroartemisinin-piperaquine group (0 episodes over 42.3 person-years at risk, P<0.001), as was the prevalence of parasitemia (40.5% in the sulfadoxine-pyrimethamine group vs. 16.6% in the three-dose dihydroartemisinin-piperaquine group [P<0.001] and 5.2% in the monthly dihydroartemisinin-piperaquine group [P<0.001]). In each treatment group, the risk of vomiting after administration of any dose of the study agents was less than 0.4%, and there were no significant differences among the groups in the risk of adverse events., Conclusions: The burden of malaria in pregnancy was significantly lower among adolescent girls or women who received intermittent preventive treatment with dihydroartemisinin-piperaquine than among those who received sulfadoxine-pyrimethamine, and monthly treatment with dihydroartemisinin-piperaquine was superior to three-dose dihydroartemisinin-piperaquine with regard to several outcomes. (Funded by the Eunice Kennedy Shriver National Institute of Child Health and Human Development; ClinicalTrials.gov number, NCT02163447.).
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- 2016
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42. The time has come to make cervical cancer prevention an essential part of comprehensive sexual and reproductive health services for HIV-positive women in low-income countries.
- Author
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Huchko MJ, Maloba M, Nakalembe M, and Cohen CR
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- Adult, Developing Countries, Early Detection of Cancer, Female, Humans, Poverty, HIV Infections complications, Reproductive Health Services, Uterine Cervical Neoplasms prevention & control
- Abstract
Introduction: HIV and cervical cancer are intersecting epidemics that disproportionately affect one of the most vulnerable populations in the world: women in low- and middle-income countries (LMICs). Historically, the disparity in cervical cancer risk for women in LMICs has been due to the lack of organized screening and prevention programmes. In recent years, this risk has been augmented by the severity of the HIV epidemic in LMICs. HIV-positive women are at increased risk for developing cervical precancer and cancer, and while the introduction of antiretroviral therapy has dramatically improved life expectancies among HIV-positive women it has not been shown to improve cancer-related outcomes. Therefore, an increasing number of HIV-positive women are living in LMICs with limited or no access to cervical cancer screening programmes. In this commentary, we describe the gaps in cervical cancer prevention, the state of evidence for integrating cervical cancer prevention into HIV programmes and future directions for programme implementation and research., Discussion: Despite the biologic, behavioural and demographic overlap between HIV and cervical cancer, cervical cancer prevention has for the most part been left out of sexual and reproductive health (SRH) services for HIV-positive women. Lower cost primary and secondary prevention strategies for cervical cancer are becoming more widely available in LMICs, with increasing evidence for their efficacy and cost-effectiveness. Going forward, cervical cancer prevention must be considered a part of the essential package of SRH services for HIV-positive women. Effective cervical cancer prevention programmes will require a coordinated response from international policymakers and funders, national governments and community leaders. Leveraging the improvements in healthcare infrastructure created by the response to the global HIV epidemic through integration of services may be an effective way to make an impact to prevent cervical cancer among HIV-positive women, but more work remains to determine optimal approaches., Conclusions: Cervical cancer prevention is an essential part of comprehensive HIV care. In order to ensure maximal impact and cost-effectiveness, implementation strategies for screening programmes must be adapted and rigorously evaluated through a framework that includes equal participation with policymakers, programme planners and key stakeholders in the target communities.
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- 2015
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43. Vaccines against human papillomavirus in low and middle income countries: a review of safety, immunogenicity and efficacy.
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Nakalembe M, Mirembe FM, and Banura C
- Abstract
Currently, there is limited data on the immunogenicity and efficacy of human papillomavirus vaccines in Low and Middle income countries (LMIC). The review aims to summarize the current status from published HPV vaccine safety, immunogenicity and efficacy studies in low and middle income countries (LMIC). Electronic databases (PubMed/MEDLINE and HINARI) were searched for peer reviewed English language articles on HPV vaccination in LMIC that have so far been published from 1st January 2006 up to 30th January 2015. Eligible studies were included if they had used the bivalent (bHPV) or quadrivalent HPV (qHPV) vaccines in a LMIC and investigated safety, immunogenicity and/or efficacy. The main findings were extracted and summarized. A total of fourteen HPV vaccine studies assessing safety, Immunogenicity and efficacy of the bivalent or quadrivalent vaccines in LMIC were included. There are only ten published clinical trials where a LMIC has participated. There was no published study so far that assessed efficacy of the HPV vaccines in Sub-Saharan Africa. From these studies, vaccine induced immune response was comparable to that from results of HICs for all age groups. Studies assessing HPV vaccine efficacy of the bivalent or quadrivalent vaccine within LMIC were largely missing. Only three studies were found where a LMIC was part of a multi center clinical trial. In all the studies, there were no vaccine related serious adverse events. The findings from the only study that investigated less than three doses of the bivalent HPV-16/18 vaccine suggest that even with less than three doses, antibody levels were still comparable with older women where efficacy has been proven. The few studies from LMIC in this review had comparable safety, Immunogenicity and efficacy profiles like in HIC. Overall, the LMIC of Africa where immune compromising/modulating situations are prevalent, there is need for long term immunogenicity as well as surveillance studies for long term clinical effectiveness after two and three dose regimens.
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- 2015
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44. Immunogenicity to the bivalent HPV-16/18 vaccine among adolescent African students exposed to helminths and malaria.
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Nakalembe M, Banura C, Namujju PB, and Mirembe FM
- Subjects
- Adolescent, Antibodies, Protozoan blood, Child, Cohort Studies, Feces parasitology, Female, Follow-Up Studies, Humans, Male, Papillomavirus Vaccines administration & dosage, Prospective Studies, Uganda, Antibodies, Viral blood, Helminthiasis immunology, Human papillomavirus 16 immunology, Human papillomavirus 18 immunology, Malaria immunology, Papillomavirus Vaccines immunology
- Abstract
Introduction: Efficacious vaccines that prevent human papillomavirus (HPV) infection, the recognized cause of cervical cancer, are now available. However, in sub-Saharan Africa, immune-modulating infections such as helminths and malaria may affect immunogenicity to the HPV vaccine. This study aimed to evaluate the effect of helminth infections and exposure to malaria on the immune response to the bivalent HPV-16/18 vaccine., Methodology: AS04-adjuvanted HPV-16/18 vaccinated students between 10 and 16 years of age from western Uganda, at 18 months-post vaccination were followed up for six months. After consent was obtained, demographic data, blood, and stool samples were collected. Multiplex HPV serology technology was used to determine HPV-16/18 antibody levels expressed as median fluorescent intensity (MFI). The malaria antibody immunoassay test was used to detect antibodies to malaria parasites. The Kato-Katz method was used to detect the presence of helminths. HPV-16/18 antibody levels among students exposed to malaria or helminths were compared with those who were not exposed using the Student's t-test., Results: A total of 211 students participated in the study. There was no difference between MFI levels to HPV-16/18 antibodies at 18- and 24-month follow-ups among students who were positive and negative to malaria or helminth exposure. There was an increase in HPV-18 MFI antibody levels at month 24 among the students who were positive for malaria at enrolment (p = 0.05)., Conclusions: Immune-modulating parasites (malaria/helminths) were not associated with reduced immune response to the bivalent HPV-16/18 vaccine. The data may support the use of this vaccine in sub-Saharan Africa.
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- 2015
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45. The levels of anti-HPV16/18 and anti-HPV31/33/35/45/52/58 antibodies among AS04-adjuvanted HPV16/18 vaccinated and non-vaccinated Ugandan girls aged 10-16 years.
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Nakalembe M, Banura C, Namujju PB, and Mirembe FM
- Abstract
Background: Data on Human Papilloma virus (HPV) vaccine immune response in sub-Saharan Africa is still sparse yet such knowledge is critical for optimal implementation and monitoring of HPV vaccines. Our primary objective was to evaluate levels of anti-HPV-16/18 antibodies and six other 'high risk' HPV (hrHPV) types among the vaccinated and unvaccinated Ugandan girls., Methods: We conducted a cross sectional study among AS04-adjuvanted HPV-16/18 vaccinated and unvaccinated school girls aged 10-16 years in Western Uganda using purposive sampling. The vaccinated girls were at 18 months post vaccination. After consenting and assenting, data was collected using interviewer administered questionnaires for demographics and sexual history. Blood was drawn from which serum samples were analysed by the multiplex HPV serology technology to determine anti-HPV antibody levels to HPV-16/18 and six other hrHPV types (31, 33, 35, 45, 52 and 58). The antibody levels were expressed as Median Fluorescent Intensity (MFI). A total of 207 vaccinated [mean age 13.1 years (SD 1.5); range 10-16 years] and 197 unvaccinated girls [mean age 13.6 years (SD 1.3); range 10-16 years] participated in the study. Sexual activity was self reported among 14/207 (6.8%) vaccinated and 5/197 (2.5%) unvaccinated girls. The MFI levels for HPV-16 and HPV-18 were 15 and 20 times higher respectively in the vaccinated girls than in the unvaccinated girls. HPV-16 mean MFI level was 4691(SD 1812; 95% CI: 4438-4958) among the vaccinated compared to 218 (SD 685; 95% CI: 190-252) among the unvaccinated girls. For HPV-18 the mean MFI level was 1615 (SD 1326; 95% CI: 1470-1776) among the vaccinated compared to MFI 103 (SD 506; 95% CI: 88 -121) among unvaccinated girls. In addition antibody levels to non vaccine hrHPV types (31, 33, 35, 45, 52 and 58) were all significantly higher in the vaccinated group than in the unvaccinated group (p<0.01)., Conclusion: The AS04-Adjuvanted HPV-16/18 vaccinated girls showed a higher level of antibodies to HPV-16/18 and other non-vaccine hrHPV types compared to the unvaccinated girls. This may translate into protection against HPV-16/18 and other hrHPV types.
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- 2014
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46. Notes on the use of urine-CCA dipsticks for detection of intestinal schistosomiasis in preschool children.
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Navaratnam AM, Mutumba-Nakalembe MJ, Stothard JR, Kabatereine NB, Fenwick A, and Sousa-Figueiredo JC
- Subjects
- Animals, Antigens, Helminth immunology, Child, Preschool, Female, Glycoproteins immunology, Helminth Proteins immunology, Humans, Infant, Male, Parasite Egg Count, Prevalence, Schistosoma mansoni immunology, Schistosomiasis mansoni epidemiology, Schistosomiasis mansoni immunology, Sensitivity and Specificity, Uganda epidemiology, Urine parasitology, Antigens, Helminth urine, Feces parasitology, Glycoproteins urine, Helminth Proteins urine, Reagent Strips, Schistosoma mansoni isolation & purification, Schistosomiasis mansoni urine, Urine chemistry
- Abstract
Urine-dipstick diagnostic tests that detect schistosome circulating cathodic antigen (CCA) have the potential to provide more sensitive and rapid testing for intestinal schistosomiasis in field-based surveys; this is especially so when examining preschool children, from whom it may be difficult to obtain consecutive stool samples. To assess the performance of urine dipsticks, 569 preschool children from four villages along the shore of Lake Albert, Uganda, were screened for Schistosoma mansoni by Kato-Katz (K-K) examination of a single stool sample and CCA urine dipsticks. The prevalence of infection was 32.2% by K-K and 40.0% by CCA tests. Sensitivity and specificity were influenced by whether 'trace' results from the CCA test were characterised as positive or negative for infection with S. mansoni; ambiguities around this issue need to be resolved. Nevertheless, the CCA test showed particular promise for routine epidemiological screening in this setting., (Copyright © 2012 Royal Society of Tropical Medicine and Hygiene. Published by Elsevier Ltd. All rights reserved.)
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- 2012
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47. Efficacy of praziquantel syrup versus crushed praziquantel tablets in the treatment of intestinal schistosomiasis in Ugandan preschool children, with observation on compliance and safety.
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Navaratnam AM, Sousa-Figueiredo JC, Stothard JR, Kabatereine NB, Fenwick A, and Mutumba-Nakalembe MJ
- Subjects
- Anthelmintics pharmacology, Child, Preschool, Female, Follow-Up Studies, Humans, Male, Neglected Diseases epidemiology, Neglected Diseases prevention & control, Parasite Egg Count, Patient Compliance, Pharmaceutical Solutions, Praziquantel pharmacology, Schistosomiasis mansoni epidemiology, Schistosomiasis mansoni prevention & control, Surveys and Questionnaires, Tablets, Treatment Outcome, Uganda epidemiology, Anthelmintics administration & dosage, Feces parasitology, Neglected Diseases drug therapy, Praziquantel administration & dosage, Schistosomiasis mansoni drug therapy
- Abstract
Preschool children (aged ≤5 years) have so far been overlooked by mass treatment campaigns targeting schistosomiasis, even though praziquantel (PZQ) has been shown to be well tolerated and effective within this age group. The WHO provided the Ugandan Ministry of Health with a syrup formulation of PZQ with the aim of assessing its safety and efficacy in comparison with crushed PZQ tablets for the treatment of intestinal schistosomiasis in preschool children. This study included 1144 preschool children randomly assigned to two treatment arms (PZQ syrup or crushed PZQ tablet) regardless of infection status for direct comparison. Diagnosis of intestinal schistosomiasis was assessed using single stool sample, double Kato-Katz smear examinations. Parasitological cure was assessed 3 weeks after treatment. The observed cure rate was 80.9% for the PZQ syrup arm and 81.7% for the crushed PZQ tablet arm, with egg reduction rates of 86.1% and 89.0%, respectively. Pre-treatment infection intensity was observed to influence cure rates significantly, with cure rates of 88.6% for light infections, 74.5% for moderate infections and 67.4% for heavy infections. No significant difference was found in non-compliance between the PZQ syrup (11.1%) and crushed PZQ tablet (14.7%) arms. PZQ syrup and crushed PZQ tablets have very similar efficacies in the treatment of intestinal schistosomiasis in preschool children., (Copyright © 2012 Royal Society of Tropical Medicine and Hygiene. Published by Elsevier Ltd. All rights reserved.)
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- 2012
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48. Closing the praziquantel treatment gap: new steps in epidemiological monitoring and control of schistosomiasis in African infants and preschool-aged children.
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Stothard JR, Sousa-Figueiredo JC, Betson M, Green HK, Seto EY, Garba A, Sacko M, Mutapi F, Vaz Nery S, Amin MA, Mutumba-Nakalembe M, Navaratnam A, Fenwick A, Kabatereine NB, Gabrielli AF, and Montresor A
- Subjects
- Africa epidemiology, Age Factors, Anemia epidemiology, Animals, Anthelmintics therapeutic use, Child, Preschool, Coinfection, Feces parasitology, Female, Hepatomegaly, Humans, Infant, Praziquantel therapeutic use, Prevalence, Schistosomiasis haematobia epidemiology, Schistosomiasis haematobia prevention & control, Schistosomiasis mansoni epidemiology, Schistosomiasis mansoni prevention & control, Splenomegaly, Water parasitology, Water standards, Anthelmintics administration & dosage, Praziquantel administration & dosage, Schistosomiasis haematobia drug therapy, Schistosomiasis mansoni drug therapy
- Abstract
Where very young children come into contact with water containing schistosome cercariae, infections occur and schistosomiasis can be found. In high transmission environments, where mothers daily bathe their children with environmentally drawn water, many infants and preschool-aged children have schistosomiasis. This 'new' burden, inclusive of co-infections with Schistosoma haematobium and Schistosoma mansoni, is being formally explored as infected children are not presently targeted to receive praziquantel (PZQ) within current preventive chemotherapy campaigns. Thus an important PZQ treatment gap exists whereby infected children might wait up to 4-5 years before receiving first treatment in school. International treatment guidelines, set within national treatment platforms, are presently being modified to provide earlier access to medication(s). Although detailed pharmacokinetic studies are needed, to facilitate pragmatic dosing in the field, an extended 'dose pole' has been devised and epidemiological monitoring has shown that administration of PZQ (40 mg/kg), in either crushed tablet or liquid suspension, is both safe and effective in this younger age-class; drug efficacy, however, against S. mansoni appears to diminish after repeated rounds of treatment. Thus use of PZQ should be combined with appropriate health education/water hygiene improvements for both child and mother to bring forth a more enduring solution.
- Published
- 2011
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49. Factors associated with persistent hypertension after puerperium among women with pre-eclampsia/eclampsia in Mulago hospital, Uganda.
- Author
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Ndayambagye EB, Nakalembe M, and Kaye DK
- Subjects
- Adolescent, Adult, Case-Control Studies, Chronic Disease, Creatinine blood, Eclampsia epidemiology, Female, Humans, Hypertension blood, Hypertension epidemiology, Incidence, Logistic Models, Maternal Age, Multivariate Analysis, Pre-Eclampsia epidemiology, Pregnancy, Prospective Studies, Puerperal Disorders blood, Puerperal Disorders epidemiology, Risk Factors, Socioeconomic Factors, Surveys and Questionnaires, Uganda epidemiology, Uric Acid blood, Eclampsia etiology, Hypertension etiology, Pre-Eclampsia etiology, Puerperal Disorders etiology
- Abstract
Background: Women with severe pre-eclampsia/eclampsia are at risk of developing chronic hypertension in future. Chronic hypertension may manifest initially as persistent hypertension at the end of the puerperium. The objective was to determine the incidence and maternal biochemical, hematological and socio-demographic risk factors for persistent hypertension in patients with pre-eclampsia/eclampsia., Methods: This was a prospective cohort study conducted from November 2008 to May 2009 at Mulago hospital labor ward and postnatal clinic. Participants were 200 women managed for pre-eclampsia/eclampsia and followed up to the end of the puerperium. Data was collected through using pre-coded interviewer-administered questionnaires, checking medical records and laboratory investigations. STATA (release 9) software was used for data analysis. At bivariate analysis, the relative risk of persistent hypertension was estimated at the 95% confidence level. Using multivariate logistic regression analysis, factors that were independently associated with persistent hypertension were evaluated., Results: Fifty four (27.7%) out of the total 195 women had persistent hypertension after puerperium. Serum creatinine and the age of the patient were the only factors associated with persistence of hypertension after puerperium., Conclusion: Nearly every one in four mothers with pre-eclampsia/eclampsia are at risk of persistent hypertension after the puerperium. Serum creatinine, serum uric acid and participants' age were the only factors independently associated with persistence of hypertension after the puerperium.
- Published
- 2010
- Full Text
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