18 results on '"Tapera T"'
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2. The effect of silver on the acidic ferric sulfate leaching of primary copper sulfides under recycle solution conditions observed in heap leaching. Part 4: Semiconductor behaviour
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Tapera, T., Nikoloski, A.N., Tapera, T., and Nikoloski, A.N.
- Abstract
The semiconductor properties of chalcopyrite during leaching in sulfate solutions in the presence of silver have been investigated. A combination of Mott-Schottky plots and potentiodynamic polarisation was used to determine the transformations of the chalcopyrite surface as the potential was changed between +200 mV (SHE) and 1200 mV (SHE). The tests were carried out at 25 °C and 50 °C. The solutions used were 0.2 M and 0.5 M H2SO4 in the presence of 100 ppm Ag+ and then in the absence of Ag+. The semiconductor behaviour of chalcopyrite was different depending on the presence or absence of Ag. At 25 °C, two surface layers formed between 500 mV (SHE) and 1000 mV (SHE) in both the 0.2 M and 0.5 M acid solutions. The presence of Ag in both these solutions shifted the potentials at which the surface phases formed to more positive potentials. In the presence of Ag at 50 °C, there was formation of successive surface layers at potentials between 850 mV (SHE) and 1000 mV (SHE). It was concluded that Ag had a significant influence on the semiconductor properties of the chalcopyrite surface. The Ag present on the surface as metallic Ag acts as surface states and provides a path for electrons to tunnel or hop from the valence band to the conduction band.
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- 2019
3. The effect of silver on the acidic ferric sulfate leaching of primary copper sulfides under recycle solution conditions observed in heap leaching. Part 3: Surface characterization
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Tapera, T., Nikoloski, A.N., Tapera, T., and Nikoloski, A.N.
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The surface products formed on chalcopyrite during leaching in sulfate solutions in the presence of various additives were investigated. A combination of SEM, EDS, TEM, FIB and XRD was used to characterize the surface products formed under different leaching conditions. The influence of additives such as ethylene glycol, wetting agent and chloride ions, in both the presence and absence of silver ions, on the type of surface products formed was investigated. In the presence of both silver ions and ethylene glycol, metallic silver in the form of nanoparticles was formed and deposited on the surface. The silver nanoparticles were predominantly cubic in shape and had varying dimensions up to 500 nm. The metallic silver formation is aided by the reduction of silver ions with ethylene glycol in the sulfate media. The deposition of metallic silver on the chalcopyrite surface in turn enhances the leaching of the chalcopyrite by improving the surface conductivity. In the presence of low dosages of chloride ions, large quantities of elemental sulfur were formed. Increasing the concentration of chloride ions reduced the extent of sulfur formation. The elemental sulfur formed in the presence of chloride ions was found to be porous. In the presence of a wetting agent, the formation of elemental sulfur was again observed, both in the presence and absence of silver, but its influence on the leaching process may be less.
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- 2019
4. The effect of silver on the acidic ferric sulfate leaching of primary copper sulfides under recycle solution conditions observed in heap leaching. Part 2: Synergistic additives
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Tapera, T., Sheean, J., Nikoloski, A.N., Tapera, T., Sheean, J., and Nikoloski, A.N.
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The leaching of a chalcopyrite-bearing ore in sulfate solutions typical of heap leaching systems with various additives present was investigated. The catalytic effects of Ag ions and other additives, which included ethylene glycol, chloride ions and a wetting agent, were investigated experimentally for potential synergistic effects. It was established that the benefit of low Ag ion concentrations on Cu extraction can be enhanced significantly by the presence of additional components in the leach solution. The presence of Ag ions and ethylene glycol resulted in increased Cu extraction compared to just Ag ions. It was observed that in the presence of both chloride ions and Ag ions, the Cu extraction was significantly higher at high chloride concentrations than at lower concentrations. A strong synergistic effect on Cu extraction was observed also between Ag ions and a wetting agent. Cu extractions exceeding 80% after 10 days were observed when Ag ions and the wetting agent were both present. Only a small amount of the wetting agent was required to produce this result.
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- 2018
5. Intersecting Epidemics: The Predictors of Continued Utilization of HIV Care and Treatment Services During the COVID-19 Outbreak Among People Living with HIV in ZIMBABWE.
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Tapera T, Odimegwu C, Makoni T, Mukuwapasi W, Chitiyo V, Kadziyanike G, Willis N, Mutsinze A, Mawodzeke M, Chimberengwa P, and Phiri M
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- Humans, Zimbabwe epidemiology, Male, Female, Adult, Adolescent, Young Adult, Middle Aged, Surveys and Questionnaires, Anti-HIV Agents therapeutic use, Rural Population statistics & numerical data, Epidemics, Cross-Sectional Studies, COVID-19 epidemiology, COVID-19 prevention & control, HIV Infections epidemiology, HIV Infections drug therapy, Patient Acceptance of Health Care statistics & numerical data, SARS-CoV-2
- Abstract
Globally, there have been considerable achievements towards HIV care and treatment. AIDS-related deaths have been reduced by 60% since the peak in 2004. Potentially, the fight against the HIV epidemic was made more difficult with the outbreak of COVID-19. Thus, this study examined the implications of COVID-19 in the utilization of HIV care and treatment services among people living with HIV on antiretroviral therapy (ART) in Zimbabwe. The study aimed to identify the critical factors defining the utilization of HIV services at the advent of COVID-19 using the fifth revision of the Anderson Behavioral Model of Healthcare Utilization. The study utilized a concurrent triangulation design of which only one data collection phase was used. The quantitative data was collected from 2,157 people living with HIV on antiretroviral viral therapy through a structured interviewer-administered questionnaire. On the other hand, qualitative data was collected through in-depth interviews. Regarding accessing ART refills, the study findings revealed that adolescents aged 15-19 (aOR = 2.16; 95% CI: 1.18-3.96) had higher odds of utilizing ART refills compared to their counterparts who were aged 20-24. Living in a rural area was associated with higher odds of utilizing the ART refill service (aOR = 2.20; 95% CI: 1.49-3.24). Regarding accessing viral load monitoring adults aged 25-39 (aOR = 0.41; 95% CI: 0.26-0.66) were less likely to utilize viral load monitoring compared to young people aged 20-24. Being vaccinated for COVID-19 was significantly associated with higher odds of utilizing the viral load monitoring service (aOR = 1.97; 95% CI: 1.36-2.87) than those not yet vaccinated. Living in a rural area was associated with higher odds of utilizing viral load monitoring (aOR = 1.50; 95% CI: 1.09-2.08). Regarding tuberculosis preventative therapy, adults aged 25-39 (aOR = 0.30; 95% CI: 0.20-0.47) were less likely to utilize tuberculosis preventative therapy compared to young people aged 20-24. Being vaccinated for COVID-19 was significantly associated with higher odds of utilizing tuberculosis preventative therapy (aOR = 1.59; 95% CI: 1.12-2.25) than those not yet vaccinated. Living in a rural area was associated with higher odds of utilizing tuberculosis preventive therapy (aOR = 1.58; 95% CI: 1.19-2.08). Regarding tuberculosis screening being vaccinated for COVID-19 was significantly associated with higher odds of utilizing tuberculosis screening services (aOR = 1.89; 95% CI: 1.41-2.54) than those not yet vaccinated. Although the severity of the COVID-19 pandemic has dwindled, COVID-19 appears to come and go in waves, and a few countries are still recording relatively high cases. It is therefore likely that the factors associated with utilization of HIV services identified by the study such as age, residence, type of health facility, vaccination of COVID-19 and fear of contracting COVID-19, among others, need to be included when planning to improve access to health utilization., (© 2023. This is a U.S. Government work and not under copyright protection in the US; foreign copyright protection may apply.)
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- 2024
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6. Improving the sexual health of women with disabilities in sub-Saharan Africa: a scoping review of published studies.
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Bolarinwa OA, Odimegwu C, and Tapera T
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- Humans, Female, Africa South of the Sahara epidemiology, Sex Offenses, Contraception Behavior statistics & numerical data, Contraception Behavior psychology, Reproductive Health, Sexual Health, Disabled Persons psychology, Sexual Behavior
- Abstract
Background: An essential aspect of human well-being is positive sexual health outcomes. However, the issue of adverse sexual health outcomes continues to be a major public health concern, particularly for women with disabilities in sub-Saharan Africa (SSA). Therefore, this current scoping review mapped studies conducted in the last twenty-nine years on the sexual health of women with disabilities from these five dimensions: sexual activity, contraceptive use, sexual autonomy, sexual violence and risky sexual behaviour, whilst seeking to identify the current state of knowledge and address the study gaps in SSA., Methods: This current scoping review was informed by the methodological framework proposed by Arksey and O'Malley. Exploratory searches were conducted in PubMed, Web of Science, African Journals Online, etc., to identify studies conducted in SSA that focus on sexual activity, contraceptive use, sexual autonomy, sexual violence and risky sexual behaviour among women with disabilities in SSA since the inception of the International Conference on Population and Development in 1994 to 30th of March 2024. This process resulted in the inclusion of seventeen (17) studies., Results: Of the 1362 identified through various databases, 34 studies were included for the full-text retrieval and screening; only 17 studies met the inclusion criteria. The eligible studies were conducted across six countries in SSA and published between 2008 and 2023. Eight studies used quantitative study type, six utilised qualitative approach, and three employed mixed-methods analysis. Two studies were conducted on sexual activity, ten were conducted on contraceptive use, four were conducted on sexual violence, and one study was conducted on risky sexual behaviour, whilst no study on sexual autonomy met the inclusion criteria., Conclusion: This review showed that there were few or scarce studies on sexual activity, contraceptive use, sexual autonomy, sexual violence and risky sexual behaviour among women with disabilities in SSA and even where the studies were substantial (contraceptive use), the majority of the studies were conducted in a country. Future studies should consider examining dimensions of sexual health, such as sexual autonomy, sexual activity and risky sexual behaviour of women with disabilities that were not available or were scarce in the literature., (© 2024. The Author(s).)
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- 2024
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7. Functional connectivity development along the sensorimotor-association axis enhances the cortical hierarchy.
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Luo AC, Sydnor VJ, Pines A, Larsen B, Alexander-Bloch AF, Cieslak M, Covitz S, Chen AA, Esper NB, Feczko E, Franco AR, Gur RE, Gur RC, Houghton A, Hu F, Keller AS, Kiar G, Mehta K, Salum GA, Tapera T, Xu T, Zhao C, Salo T, Fair DA, Shinohara RT, Milham MP, and Satterthwaite TD
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- Humans, Adolescent, Female, Male, Young Adult, Child, Child, Preschool, Nerve Net physiology, Nerve Net diagnostic imaging, Neural Pathways physiology, Adult, Cerebral Cortex diagnostic imaging, Cerebral Cortex physiology, Cerebral Cortex growth & development, Connectome, Sensorimotor Cortex physiology, Sensorimotor Cortex diagnostic imaging, Magnetic Resonance Imaging
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Human cortical maturation has been posited to be organized along the sensorimotor-association axis, a hierarchical axis of brain organization that spans from unimodal sensorimotor cortices to transmodal association cortices. Here, we investigate the hypothesis that the development of functional connectivity during childhood through adolescence conforms to the cortical hierarchy defined by the sensorimotor-association axis. We tested this pre-registered hypothesis in four large-scale, independent datasets (total n = 3355; ages 5-23 years): the Philadelphia Neurodevelopmental Cohort (n = 1207), Nathan Kline Institute-Rockland Sample (n = 397), Human Connectome Project: Development (n = 625), and Healthy Brain Network (n = 1126). Across datasets, the development of functional connectivity systematically varied along the sensorimotor-association axis. Connectivity in sensorimotor regions increased, whereas connectivity in association cortices declined, refining and reinforcing the cortical hierarchy. These consistent and generalizable results establish that the sensorimotor-association axis of cortical organization encodes the dominant pattern of functional connectivity development., (© 2024. The Author(s).)
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- 2024
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8. Patterns and correlates of intention to use contraceptives among fecund sexually active women in developing countries.
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Odimegwu C, Phiri M, Tapera T, and Simona S
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- Female, Pregnancy, Humans, Adolescent, Young Adult, Adult, Middle Aged, Cross-Sectional Studies, Developing Countries, Fertility, Contraceptive Agents, Intention
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Background: Understanding a woman's future contraceptive needs and enhancing her chances of putting those needs into action depend heavily on her intentions to use contraceptive methods. However, there is little information about global perspectives of intention to utilise contraceptives among fecund sexually active women., Objectives: This study examines the patterns and determinants of contraception intention of fecund sexually active women., Methods: The most recent Demographic and Health Surveys (DHS) from 59 countries were used for secondary data analysis. The DHSs applied a cross-sectional survey design to collect data from women between the ages of 15 and 49. The study comprises a sample of 697,590 fecund sexually active women in the reproductive ages. The desire to utilise contraceptive methods was examined using a multivariable binary logistic regression analysis. All analyses were weighted to allow for a complex survey design., Results: A pooled prevalence of intention to utilise contraception was 42.8% (95% CI: 42.5, 43.1) at the global level. Eastern and Southern Europe had the lowest prevalence, 17.3% (95% CI: 16.4, 18.2), and the highest prevalence was observed in countries from Latin America and the Caribbean, 68.0% (95% CI: 67.5, 69.9). Attaining secondary-level education (adjusted odds ratio (aOR) = 1.68; 95% CI: 1.62-1.72) or higher (aOR = 1.71; 95% CI: 1.63-1.80), working (aOR = 1.21; 95% CI: 1.18-1.24), experience of a pregnancy loss (aOR = 1.06; 95% CI: 1.03-1.09), or being exposed to media family planning messages (aOR = 1.51; 95% CI: 1.48-1.55) were factors associated with an increased likelihood of intent to use contraceptives., Conclusions: The study has established that contraceptive use intention was low in many developing countries. Education, age, employment status, fertility preference, and exposure to family planning messages influenced contraceptive use intention. Health policy-makers ought to consider these factors when designing sexual and reproductive health strategies in developing countries.
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- 2023
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9. Prevalence of Cervical Cancer and Clinical Management of Women Screened positive using visual inspection with acetic acid and Cervicography in selected public sector health facilities of Manicaland and Midlands provinces of Zimbabwe, 2021.
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Tachiwenyika E, Dhodho M, Muchedzi A, Sibanda TP, Mupanguri C, Mukungunugwa S, Mhangara M, Ganje N, Tapera T, Samushonga T, Muzondo M, Dube S, Tafuma T, Chingombe B, Maravanyika A, and Nyamundaya T
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- Humans, Female, Acetic Acid, Zimbabwe epidemiology, Retrospective Studies, Prevalence, Cross-Sectional Studies, Public Sector, Mass Screening, Early Detection of Cancer, Health Facilities, Uterine Cervical Neoplasms diagnosis, Uterine Cervical Neoplasms epidemiology, Uterine Cervical Neoplasms therapy, HIV Seropositivity, HIV Infections diagnosis, HIV Infections epidemiology
- Abstract
Background: Zimbabwe has high cervical cancer (CC) burden of 19% and mortality rate of 64%. Zimbabwe uses Visual Inspection with Acetic Acid and Cervicography (VIAC) for CC screening. Manicaland and Midlands provinces recorded low VIAC positivity of 3% (target 5-25%) and treatment coverage of 78% (target = 90%) between October 2020 and September 2021., Objectives: We explored VIAC positivity rate and clinical management of clients screening positive in Manicaland and Midlands provinces., Methods: We conducted a retrospective cross-sectional study using routine VIAC and CC management data for period October 2020 to September 2021. Two samples were used, 1) a sample drawn from 48,000 women VIAC screened to measure positivity rate, and 2) a sample of 1,763 VIAC positive women to assess clinical management. Kobo-based tool was used to abstract data from facility registers, and data were analyzed using STATA 15., Results: We analyzed data for 2,454 out of 48,000 women screened through VIAC. About 82% (2,007/2,454) were HIV positive, median ages were 40 and 38 years for HIV positives and negatives respectively. Most (64% and 77%) of HIV positive and negative clients respectively were married. VIAC positivity was 5.9% and 3.4% among HIV positive and negative women screened for the first time, and 3.2% and 5.6% for repeat visits respectively. Overall, 89.1% (1,571/1,763) of VIAC positive women received treatment. Most (41%) of those treated received thermocoagulation. Overall, 43.1% of clients received treatment on VIAC day, and 77.4% within 30 days. Six-month post-treatment coverage was 3.8%., Conclusion: VIAC positivity among HIV positive women screening for the first time was 5.9%, within the expected 5-25%. Treatment coverage was high, and turnaround time from diagnosis to treatment met national standards. Post-treatment coverage was suboptimal. We recommend continued implementation of quality improvement initiatives, capacity building of clinicians, and optimization of post-treatment review of clients., Competing Interests: The authors have declared that no competing interests exist., (Copyright: © 2023 Tachiwenyika et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.)
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- 2023
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10. Intersecting epidemics: COVID-19 and HIV in sub-Saharan Africa. A systematic review (2020-2022).
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Tapera T, Odimegwu C, Petlele R, Sello MV, Dzomba A, Aladejebi O, and Phiri M
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There has been significant progress with regards to winning the fight against HIV globally, particularly due to the introduction of antiretroviral therapy (ART). COVID-19 threatened to derail gains in the fight against HIV. As we have started to see with studies on COVID-19 and HIV, there is a need to 'provide an in-depth view' in understanding the dynamics between the two epidemics, especially in sub-Saharan Africa. We, therefore, undertook a systemic review of existing literature to synthesize the effects of COVID-19 on the utilization of HIV services in sub-Saharan Africa, the literature on the risks associated with HIV during the COVID-19 pandemic, and lastly, the innovations and strategies adopted to continue receiving treatment in sub-Saharan Africa. We conducted a systematic review of studies published between 2020 and April 2022. We searched for relevant sub-Saharan studies in the following databases: PubMed, Google Scholar, J-STOR, and Science Direct. The review followed the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines. The search identified 647 papers, and after screening, 41 were in line with the inclusion criteria and were included in the review. There was evidence of the negative effects of COVID-19 on reducing HIV testing, ART treatment, and HIV prevention services. There is evidence pointing to the need for people living with HIV to be prioritized for COVID-19 vaccinations. Innovations and strategies implemented to mitigate the effects of COVID-19 on HIV services include community-based ART distribution, multi-month ART dispensing, the use of digital technologies, and the use of the already existing HIV infrastructure to fight COVID-19. It is still imperative that future studies explore the predictors of utilization of HIV services in the advent of COVID-19., (Copyright © 2023, the Author(s).)
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- 2023
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11. The Relationship between Childcare-Giving Arrangements and Children's Malnutrition Status in South Africa.
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Sello M, Adedini SA, Odimegwu C, Petlele R, and Tapera T
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- Female, Humans, Child, Infant, Nutritional Status, South Africa epidemiology, Child Care, Cross-Sectional Studies, Growth Disorders epidemiology, Growth Disorders etiology, Prevalence, Overweight epidemiology, Malnutrition epidemiology
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Multiple caregiving arrangements have become common for childcare globally, and South Africa is no exception. Previous childcare studies mainly focused on the caregiver and household characteristics. Evidence on the influence of childcare on malnutrition is sparse. This study aimed to examine the relationship between exposure to secondary and multiple forms of care and child malnutrition, with a particular focus on child stunting and overweight among children. A cross-sectional study of a sample of 2966 dyads of mothers and children under five were analysed from the 2017 National Income Dynamics Study (NIDS) Wave 5. Descriptive and inferential statistics were used to analyse the data. The results indicated that 22.16% of the children were stunted and that 16.40% were overweight. Most children were mainly cared for at home (67.16%) during the day. Some results of the obtained multivariable analyses show that lack of being cared for in a crèche or school during the day was significantly associated with stunting (odds ratio (OR) 2; confidence interval (CI) 1.10-3.62, p < 0.05) and overweight (OR) 3.82; (CI) 1.60-9.08, p < 0.05). Furthermore, in this study, 69.88% of children who were cared for at home by the primary caregiver had no other forms of multiple care arrangements. The results showing high stunting and overweight rates among children cared for at home suggest that the government needs to look into supporting caregiver parenting. The high unemployment rates in the country highlight the importance of socioeconomic status in childcare and its implication for children's nutritional outcomes. The study's findings suggest the need for innovative strategies to address the challenges associated with multi-caregiving which negatively affects children's nutritional outcomes.
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- 2023
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12. Early retention among pregnant women on 'Option B + ' in urban and rural Zimbabwe.
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Chimwaza AN, Tweya H, Mugurungi O, Mushavi A, Mukungunugwa S, Sithole N, Nyakura J, Senkoro M, Owiti P, Ncube R, Tapera T, Mandewo W, Edwards JK, Mangombe A, and Taramusi I
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- Adult, Female, Humans, Infectious Disease Transmission, Vertical, Pregnancy, Zimbabwe, HIV Infections transmission, Pregnancy Complications, Infectious drug therapy, Pregnant Women
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Background: In 2013, the World Health Organisation (WHO) recommended Option B+ as a strategy to prevent mother-to-child transmission (PMTCT) of HIV. In option B+ , lifelong antiretroviral therapy (ART) is offered to all HIV positive pregnant and breastfeeding women to reduce MTCT rate to less than or equal to 5%. Its success depends on retaining women on ART during pregnancy, delivery and breast-feeding period. There is limited data on early retention on ART among pregnant women in Zimbabwe. We therefore assessed early retention among women on Option B + from antenatal care (ANC) until 6 months post ANC booking and at delivery in Bulawayo city and Mazowe rural district of Zimbabwe., Methods: We collected data for pregnant women booking for ANC between January and March 2018, comparing early retention among ART naïve women and those already on ART. The two cohorts were followed up for 6 months post ANC booking, and this was done in two districts. Data were collected from routine tools used at facility level which include ANC, delivery and ART registers. The Kaplan-Meier survival analysis was used to estimate retention probabilities at 1, 3 and 6 months post-delivery and for retention at delivery proportions were used. Poisson regression was used to investigate factors associated with non-retention at 6 months post ANC booking., Results: A total of 388 women were included in the study with median age of 29 years (IQR: 25-34). Two-thirds booked in their second trimester. Retention at 3 and 6 months post ANC booking was 84% (95% CI 80-88) and 73% (95% CI 69-78) respectively. At delivery 81% (95% CI 76-84) were retained in care, 18% lost-to-follow-up and 1% transferred out. In this study we did not find marital status, gestation age, facility location, ART status at ANC booking, to be associated with loss to follow-up., Conclusion: In this study, we found low retention at 3, 6 months and delivery, a threat to elimination of Mother-to-child Transmission of HIV in Zimbabwe. Our findings emphasize the need for enhanced interventions to improve early retention such as post-test counselling, patient tracing and visit reminders.
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- 2021
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13. High HIV Positivity Rates Following Large-Scale HIV Self-Testing Implementation in Zimbabwe, 2018-2020.
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Muchedzi A, Mpofu M, Mudzengerere FH, Bateganya M, Mavimba T, Satti H, Dhliwayo R, Zulu T, Tapera T, Samushonga T, Nyagura T, Ncube G, and Tafuma TA
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- Adult, Diagnostic Tests, Routine, HIV Testing, Humans, Middle Aged, Zimbabwe epidemiology, HIV Infections diagnosis, Self-Testing
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Introduction: HIV self-testing (HIV-ST) is an innovative strategy to increase HIV case identification. This analysis shares the outcomes of HIV-ST implementation within the Zimbabwe HIV Care and Treatment (ZHCT) project for the period October 2018-March, 2020. Materials and Methods: We extracted HIV-ST data for the period October 2018 to March 2020 from the project database and assessed (1) the proportion of reactive HIV-ST results; (2) the concordance between reactive HIV-ST results against rapid confirmatory HIV tests using Determine™ and Chembio™ in parallel; and (3) the monthly contribution of HIV-ST to total HIV positive individuals identified within project. The Chi-square test was used to assess for statistical differences in HIV positivity between age groups, by sex and district; as well as the difference in HIV positivity between the HIV-ST and index and mobile testing strategies. Findings: Between October 2018 and March 2020, the ZHCT project distributed 11,983 HIV-ST kits; 11,924 (99.8%) were used and 2,616 (21.9%) were reactive. Of the reactive tests, 2,610 (99.8%) were confirmed HIV positive giving a final positivity rate of 21.9%, and a concordance rate of 99.8% between the HIV-ST results and the confirmatory tests. Proportion of reactive results differed by age-groups ( p < 0.001); with the 35-49 years having the highest positivity rate of 25.5%. The contribution of HIV-ST to total new positives increased from 10% in October 2018 to 80% at the end of March 2020 ( p < 0.001). Positivity rates from HIV-ST were significantly different by age-groups, sex and district ( p = 0.04). Additionally, index and mobile testing had a higher positivity rate compared to HIV-ST ( p < 0.001). Conclusion: The ZHCT project has successfully scaled up HIV self-testing which contributed significantly to HIV case finding. Countries should consider using the lessons to scale-up the intervention which will contribute in reaching under-served and undiagnosed populations., Competing Interests: The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest., (Copyright © 2021 Muchedzi, Mpofu, Mudzengerere, Bateganya, Mavimba, Satti, Dhliwayo, Zulu, Tapera, Samushonga, Nyagura, Ncube and Tafuma.)
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- 2021
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14. Prevention of mother-to-child transmission activities after one-off clinical mentorship training in selected health facilities, Zimbabwe: 2014-2018.
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Mandewo W, Muchuchuti C, Shoko O, Timire C, Takarinda KC, Harries AD, Tweya H, Tapera T, Nyathi S, Chadambuka A, Chimwaza A, and Mahomva A
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- Adult, Anti-HIV Agents therapeutic use, Cross-Sectional Studies, Female, HIV Infections diagnosis, HIV Infections epidemiology, HIV Infections prevention & control, HIV Infections transmission, Health Facilities statistics & numerical data, Humans, Implementation Science, Infant, Newborn, Infant, Newborn, Diseases diagnosis, Infant, Newborn, Diseases epidemiology, Infant, Newborn, Diseases prevention & control, Mass Screening methods, Mass Screening organization & administration, Mass Screening statistics & numerical data, Neonatal Screening methods, Neonatal Screening standards, Nurse's Role, Patient Participation, Pregnancy, Pregnancy Complications, Infectious epidemiology, Prenatal Care methods, Prenatal Care organization & administration, Prenatal Care standards, Preventive Medicine methods, Preventive Medicine organization & administration, Preventive Medicine standards, Program Evaluation, Zimbabwe epidemiology, Education, Nursing, Continuing methods, Infectious Disease Transmission, Vertical prevention & control, Mentoring methods, Pregnancy Complications, Infectious diagnosis, Pregnancy Complications, Infectious therapy
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This was a cross-sectional study describing HIV testing uptake and ART initiation for pregnant women and HIV-exposed infants after one-off clinical mentorship training in 2013 for nurses in 56 peripheral health-facilities, Zimbabwe. Between 2014-2018, 92% of 106411 pregnant women were HIV tested and 98% of HIV-positive women initiated antiretroviral therapy (ART). There were 15846 HIV-exposed infants, of whom 96% had dried blood spots collected for virologic diagnosis and 51% of those diagnosed HIV-positive initiated ART. In conclusion, this one-off clinical mentorship training in 2013 was associated with consistently high HIV testing and ART initiation in pregnant women and their children., Competing Interests: The authors declare no competing interests., (Copyright: Winnie Mandewo et al.)
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- 2020
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15. Linkage of voluntary medical male circumcision clients to adolescent sexual and reproductive health (ASRH) services through Smart-LyncAges project in Zimbabwe: a cohort study.
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Makoni TM, Thekkur P, Takarinda KC, Xaba S, Ncube G, Zwangobani N, Samuelson J, Mangombe A, Mabaya S, Tapera T, Matambo R, Ameyan W, and Mugurungi O
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- Adolescent, Cohort Studies, Humans, Male, Referral and Consultation, Sexual Behavior, Young Adult, Zimbabwe, Circumcision, Male, HIV Infections prevention & control, Reproductive Health
- Abstract
Objectives: WHO recommended strengthening the linkages between various HIV prevention programmes and adolescent sexual reproductive health (ASRH) services. The Smart-LyncAges project piloted in Bulawayo city and Mt Darwin district of Zimbabwe established a referral system to link the voluntary medical male circumcision (VMMC) clients to ASRH services provided at youth centres. Since its inception in 2016, there has been no assessment of the performance of the referral system. Thus, we aimed to assess the proportion of young (10-24 years) VMMC clients getting 'successfully linked' to ASRH services and factors associated with 'not being linked'., Design: This was a cohort study using routinely collected secondary data., Setting: All three VMMC clinics of Mt Darwin district and Bulawayo province., Primary Outcome Measures: The proportion of 'successfully linked' was summarised as the percentage with a 95% CI. Adjusted relative risks (aRR) using a generalised linear model was calculated as a measure of association between client characteristics and 'not being linked'., Results: Of 1773 young people registered for VMMC services, 1478 (83%) were referred for ASRH services as they had not registered for ASRH previously. Of those referred for ASRH services, the mean (SD) age of study participants was 13.7 (4.3) years and 427 (28.9%) were out of school. Of the referred, 463 (31.3%, 95% CI: 30.0 to 33.8) were 'successfully linked' to ASRH services and the median (IQR) duration for linkage was 6 (0-56) days. On adjusted analysis, receiving referral from Bulawayo circumcision clinic (aRR: 1.5 (95% CI: 1.3 to 1.7)) and undergoing circumcision at outreach sites (aRR: 1.2 (95% CI: 1.1 to 1.3)) were associated with 'not being linked' to ASRH services., Conclusion: Linkage to ASRH services from VMMC is feasible as one-third VMMC clients were successfully linked. However, there is need to explore reasons for not accessing ASRH services and take corrective actions to improve the linkages., Competing Interests: Competing interests: None declared., (© Author(s) (or their employer(s)) 2020. Re-use permitted under CC BY. Published by BMJ.)
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- 2020
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16. Does peer education go beyond giving reproductive health information? Cohort study in Bulawayo and Mount Darwin, Zimbabwe.
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Mangombe A, Owiti P, Madzima B, Xaba S, Makoni TM, Takarinda KC, Timire C, Chimwaza A, Senkoro M, Mabaya S, Samuelson J, Ameyan W, Tapera T, Zwangobani N, Tripathy JP, and Kumar AMV
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- Adolescent, Age Factors, Child, Circumcision, Male methods, Contraception methods, Counseling, Female, HIV Infections diagnosis, Humans, Male, Referral and Consultation, Residence Characteristics, Sex Factors, Sexually Transmitted Diseases drug therapy, Sexually Transmitted Diseases prevention & control, Socioeconomic Factors, Young Adult, Zimbabwe, Health Education organization & administration, Peer Group, Reproductive Health education
- Abstract
Objective: Peer education is an intervention within the voluntary medical male circumcision (VMMC)-adolescent sexual reproductive health (ASRH) linkages project in Bulawayo and Mount Darwin, Zimbabwe since 2016. Little is known if results extend beyond increasing knowledge. We therefore assessed the extent of and factors affecting referral by peer educators and receipt of HIV testing services (HTS), contraception, management of sexually transmitted infections (STIs) and VMMC services by young people (10-24 years) counselled., Design: A cohort study involving all young people counselled by 95 peer educators during October-December 2018, through secondary analysis of routinely collected data., Setting: All ASRH and VMMC sites in Mt Darwin and Bulawayo., Participants: All young people counselled by 95 peer educators., Outcome Measures: Censor date for assessing receipt of services was 31 January 2019. Factors (clients' age, gender, marital and schooling status, counselling type, location, and peer educators' age and gender) affecting non-referral and non-receipt of services (dependent variables) were assessed by log-binomial regression. Adjusted relative risks (aRRs) were calculated., Results: Of the 3370 counselled (66% men), 65% were referred for at least one service. 58% of men were referred for VMMC. Other services had 5%-13% referrals. Non-referral for HTS decreased with clients' age (aRR: ~0.9) but was higher among group-counselled (aRR: 1.16). Counselling by men (aRR: 0.77) and rural location (aRR: 0.61) reduced risks of non-referral for VMMC, while age increased it (aRR ≥1.59). Receipt of services was high (64%-80%) except for STI referrals (39%). Group counselling and rural location (aRR: ~0.52) and male peer educators (aRR: 0.76) reduced the risk of non-receipt of VMMC. Rural location increased the risk of non-receipt of contraception (aRR: 3.18) while marriage reduced it (aRR: 0.20)., Conclusion: We found varying levels of referral ranging from 5.1% (STIs) to 58.3% (VMMC) but high levels of receipt of services. Type of counselling, peer educators' gender and location affected receipt of services. We recommend qualitative approaches to further understand reasons for non-referrals and non-receipt of services., Competing Interests: Competing interests: None declared., (© Author(s) (or their employer(s)) 2020. Re-use permitted under CC BY. Published by BMJ.)
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- 2020
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17. Effects of a Peer-Led Intervention on HIV Care Continuum Outcomes Among Contacts of Children, Adolescents, and Young Adults Living With HIV in Zimbabwe.
- Author
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Tapera T, Willis N, Madzeke K, Napei T, Mawodzeke M, Chamoko S, Mutsinze A, Zvirawa T, Dupwa B, Mangombe A, Chimwaza A, Makoni TM, Mandewo W, Senkoro M, Owiti P, Tripathy JP, and Kumar AMV
- Subjects
- Adolescent, Child, Female, Humans, Male, Retrospective Studies, Young Adult, Zimbabwe, Anti-HIV Agents therapeutic use, Anti-Retroviral Agents therapeutic use, Community Health Services organization & administration, Continuity of Patient Care organization & administration, HIV Infections drug therapy, Peer Group
- Abstract
Background: Africaid Zvandiri, in partnership with the Ministry of Health and Child Care (MOHCC) in Zimbabwe, implemented a comprehensive, peer-led program, focused on children, adolescents, and young adults living with HIV aged 0-24 years. The peers, known as community adolescent treatment supporters (CATS), are people living with HIV (PLHIV) aged 18-24 years who are trained and mentored to support their peers throughout the HIV care continuum through support groups, home visits, phone call reminders, and messages. We report the HIV care continuum outcomes (HIV testing uptake, antiretroviral therapy [ART] uptake, retention, and viral suppression) in a cohort of household contacts and sexual partners (aged younger than 25 years) of index children, adolescents, and young adults living with HIV identified by CATS from October 2017 to September 2018 in 24 districts of Zimbabwe., Methods: This was a retrospective cohort study involving analysis of routine program data, extracted from electronic databases consisting of data on contacts of index PLHIV and ART outcomes. We used April 30, 2019, as the censor date for all analyses., Results: A total of 15,223 household contacts and sexual partners with unknown HIV status (linked to 9,353 index PLHIV) were identified and referred for HIV testing. Of these, 12,114 (79.6%) were tested and 1,193 (9.8%) were HIV-positive. Of the latter, 1,153 (96.6%) were initiated on ART with 99% starting on the day of diagnosis. Of those on ART, 1,151 (99.8%) were alive on ART at 6 months and 2 (0.2%) died. A total of 1,044 (91%) children, adolescents, and young people living with HIV underwent viral load testing at 6 months or later, of whom 1,037 (99.3%) were virally suppressed (<1000 copies/ml)., Conclusion: These findings add to the global evidence demonstrating the effectiveness of peer-led interventions in children, adolescents, and young adults living with HIV and justify the decision of the MOHCC in Zimbabwe to scale-up the model nationally. Future research should aim to understand the reasons for the gaps in HIV testing and viral load testing using qualitative research., (© Tapera et al.)
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- 2019
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18. Autism spectrum disorder (ASD) symptom profiles of children with comorbid Down syndrome (DS) and ASD: A comparison with children with DS-only and ASD-only.
- Author
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Godfrey M, Hepburn S, Fidler DJ, Tapera T, Zhang F, Rosenberg CR, and Raitano Lee N
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- Behavior Observation Techniques methods, Child, Comorbidity, Female, Humans, Male, Psychiatric Status Rating Scales, Symptom Assessment methods, United States, Autism Spectrum Disorder diagnosis, Autism Spectrum Disorder epidemiology, Autism Spectrum Disorder psychology, Behavioral Symptoms diagnosis, Down Syndrome diagnosis, Down Syndrome epidemiology, Down Syndrome psychology
- Abstract
Background: Down syndrome (DS) is associated with increased rates of autism spectrum disorder (ASD), characterized by social-communicative impairments (SOC-COM) and repetitive behaviors and interests (RBI). However, little is known about the ASD symptom presentation in children with DS + ASD., Aims: The current study sought to describe parent-report of SOC-COM and RBI symptoms on the Autism Diagnostic Interview -Revised (ADI-R) in children with DS (n = 22), DS + ASD (n = 11), and ASD (n = 66)., Method: SOC-COM and RBI scores from the ADI-R were compared across the groups whose autism status was ascertained using the Autism Diagnostic Observation Schedule., Results: Differences in SOC-COM and RBI symptom severity was observed. The general pattern of findings was ASD > DS+ASD > DS. Dissimilar ASD symptom profiles were observed across groups. In ASD, SOC-COM scores were higher than RBI scores; in DS + ASD, similar SOC-COM and RBI scores were observed. Lastly, SOC-COM impairments were highly related to verbal cognition in youth with DS + ASD but not in those with DS or ASD., Conclusions and Implications: These findings suggest that children with DS + ASD have a distinct profile of ASD symptoms that differs from peers with either disorder in isolation. Thus, care should be taken in evaluating and designing treatments for this group., (Copyright © 2019. Published by Elsevier Ltd.)
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- 2019
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