159 results on '"Elizabeth M. Stringer"'
Search Results
2. HIV-associated vaginal microbiome and inflammation predict spontaneous preterm birth in Zambia
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Joan T. Price, Bellington Vwalika, Michael France, Jacques Ravel, Bing Ma, Humphrey Mwape, Katelyn J. Rittenhouse, Kristina De Paris, Marcia Hobbs, Julie A. Nelson, Margaret P. Kasaro, Elizabeth M. Stringer, and Jeffrey S. A. Stringer
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Medicine ,Science - Abstract
Abstract A Lactobacillus-deficient, anaerobe-rich vaginal microbiome has been associated with local inflammation and spontaneous preterm birth (sPTB), but few studies have assessed this association in the setting of HIV. We performed metagenomic sequencing and inflammatory marker assays on vaginal swabs collected in pregnancy. We grouped samples into 7 metagenomic clusters (mgClust) using the non-redundant VIRGO catalogue, and derived inflammatory scores by factor analysis. Of 221 participants, median Shannon diversity index (SDI) was highest in HIV+ with detectable viral load (1.31, IQR: 0.85–1.66; p 50% predicted sPTB (RR 2.6; 95%CI: 1.1, 6.4) and was higher in HIV+ (23% vs. 10%; p = 0.001). A novel Gardnerella metagenomic subspecies more abundant in women with HIV predicted sPTB. The risk of sPTB among women with HIV may be mediated by the vaginal microbiome and inflammation, suggesting potential targets for prevention.
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- 2022
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3. Antibody Immunity to Zika Virus among Young Children in a Flavivirus-Endemic Area in Nicaragua
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Omar Zepeda, Daniel O. Espinoza, Evelin Martinez, Kaitlyn A. Cross, Sylvia Becker-Dreps, Aravinda M. de Silva, Natalie M. Bowman, Lakshmanane Premkumar, Elizabeth M. Stringer, Filemón Bucardo, and Matthew H. Collins
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Zika ,antibodies ,humoral immunity ,neonatal immunity ,flavivirus ,antibody-dependent enhancement ,Microbiology ,QR1-502 - Abstract
Objective: To understand the dynamics of Zika virus (ZIKV)-specific antibody immunity in children born to mothers in a flavivirus-endemic region during and after the emergence of ZIKV in the Americas. Methods: We performed serologic testing for ZIKV cross-reactive and type-specific IgG in two longitudinal cohorts, which enrolled pregnant women and their children (PW1 and PW2) after the beginning of the ZIKV epidemic in Nicaragua. Quarterly samples from children over their first two years of life and maternal blood samples at birth and at the end of the two-year follow-up period were studied. Results: Most mothers in this dengue-endemic area were flavivirus-immune at enrollment. ZIKV-specific IgG (anti-ZIKV EDIII IgG) was detected in 82 of 102 (80.4%) mothers in cohort PW1 and 89 of 134 (66.4%) mothers in cohort PW2, consistent with extensive transmission observed in Nicaragua during 2016. ZIKV-reactive IgG decayed to undetectable levels by 6–9 months in infants, whereas these antibodies were maintained in mothers at the year two time point. Interestingly, a greater contribution to ZIKV immunity by IgG3 was observed in babies born soon after ZIKV transmission. Finally, 43 of 343 (13%) children exhibited persistent or increasing ZIKV-reactive IgG at ≥9 months, with 10 of 30 (33%) tested demonstrating serologic evidence of incident dengue infection. Conclusions: These data inform our understanding of protective and pathogenic immunity to potential flavivirus infections in early life in areas where multiple flaviviruses co-circulate, particularly considering the immune interactions between ZIKV and dengue and the future possibility of ZIKV vaccination in women of childbearing potential. This study also shows the benefits of cord blood sampling for serologic surveillance of infectious diseases in resource-limited settings.
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- 2023
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4. Capnocytophaga bacteremia precipitating severe thrombocytopenia and preterm labor in an asplenic host
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Austin M. Hopkins, Nerlyne Desravines, Elizabeth M. Stringer, Katelin Zahn, Carolyn M. Webster, Kayla Krajick, and Neeta L. Vora
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capnocytophaga ,thrombocytopenia ,preterm labor ,Other systems of medicine ,RZ201-999 - Abstract
Capnocytophaga species are gram-negative bacilli that inhabit mammalian oral surfaces and can cause opportunistic infection, especially in asplenic patients. The species Capnocytophaga canimorsus is particularly associated with dog bites and is known to cause endocarditis, meningitis, and sepsis in the general population. In pregnant patients, infections tied to Capnocytophaga species from human flora have been associated with preterm labor, chorioamnionitis, and neonatal septicemia. There is little known about the effects of zoonotically-acquired Capnocytophaga infection in pregnant patients. In this case report, we present a patient with Capnocytophaga bacteremia acquired after a dog bite associated with profound thrombocytopenia and preterm labor. Dog bites are common in the United States, and we present basic recommendations for management of dog bites in pregnant patients in order to avoid morbidity associated with delay in time to antibiotic treatment of infection as described in this case.
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- 2019
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5. Epstein–Barr Virus-Induced Mononucleosis as an Imitator of Severe Preeclampsia
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S. Allison Staley, Marcela C. Smid, Sarah K. Dotters-Katz, and Elizabeth M. Stringer
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preeclampsia ,mononucleosis ,preterm birth ,maternal ,thrombocytopenia ,Gynecology and obstetrics ,RG1-991 - Abstract
Abstract Background In pregnancy, conditions presenting with hematologic abnormalities, transaminitis, and proteinuria pose diagnostic challenges in pregnancy. Case We present the case of an 18-year-old woman, G1P0, at 33 weeks' gestation with fever of unknown cause, who developed progressively elevated liver enzymes, proteinuria, and thrombocytopenia, due to Epstein–Barr virus (EBV) infection. Conclusion Acute infection with EBV should be included in the differential diagnosis of preeclampsia with severe features, particularly in the setting of fever. Supportive treatment and observation may prevent iatrogenic preterm birth.
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- 2017
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6. Modern Contraceptive and Dual Method Use among HIV-Infected Women in Lusaka, Zambia
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Carla J. Chibwesha, Michelle S. Li, Christine K. Matoba, Reuben K. Mbewe, Benjamin H. Chi, Jeffrey S. A. Stringer, and Elizabeth M. Stringer
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Gynecology and obstetrics ,RG1-991 ,Infectious and parasitic diseases ,RC109-216 - Abstract
HIV-infected women in sub-Saharan Africa are at substantial risk of unintended pregnancy and sexually transmitted infections (STIs). Linkages between HIV and reproductive health services are advocated. We describe implementation of a reproductive health counseling intervention in 16 HIV clinics in Lusaka, Zambia. Between November 2009 and November 2010, 18,407 women on antiretroviral treatment (ART) were counseled. The median age was 34.6 years (interquartile range (IQR): 29.9–39.7), and 60.1% of women were married. The median CD4+ cell count was 394 cells/uL (IQR: 256–558). Of the women counseled, 10,904 (59.2%) reported current modern contraceptive use. Among contraceptive users, only 17.7% reported dual method use. After counseling, 737 of 7,503 women not previously using modern contraception desired family planning referrals, and 61.6% of these women successfully accessed services within 90 days. Unmet contraceptive need remains high among HIV-infected women. Additional efforts are needed to promote reproductive health, particularly dual method use.
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- 2011
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7. Ultrasonic Measurement of Body Fat as a Means of Assessing Body Condition in Free-Ranging Raccoons (Procyon lotor)
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Elizabeth M. Stringer, Michael K. Stoskopf, Theodore Simons, Allan F. O'Connell, and Arielle Waldstein
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Zoology ,QL1-991 - Abstract
Assessment of body condition of free-ranging animals is important when evaluating population health and fitness. The following study used body condition scoring, ultrasound, and dissected physical measurement to assess fat stores in free-ranging raccoons (Procyon lotor). Measurements were taken of subcutaneous fat at interscapular, thoracolumbar, and lumbosacral paraspinal and ventral midline sites. These measurements were examined in relationship to body condition scores and body weight. The ultrasound technique accurately measured the subcutaneous fat of raccoons when compared to dissected physical measurement and yielded data that strongly correlated with both body condition score and body weight, with the ventral midline measurement most strongly correlated. This noninvasive method may be useful in conjunction with body condition score and body weight when assessing the nutritional status of raccoons and potentially other small carnivore species.
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- 2010
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8. SimNorth: A Novel Contrastive Learning Approach for Clustering Prenatal Ultrasound Images.
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Juan Carlos Prieto 0001, Chiraz BenAbdelkader, Teeranan Pokaprakarn, Hina Shah, Yuri Sebastião, Qing Dan, Nariman Almnini, Arieska Nicole Diaz, Srihari Chari, Harmony Chi, Elizabeth M. Stringer, and Jeffrey S. A. Stringer
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- 2023
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9. An automated framework for image classification and segmentation of fetal ultrasound images for gestational age estimation.
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Juan Carlos Prieto 0001, Hina Shah, Alan J. Rosenbaum, Xiaoning Jiang, Patrick Musonda, Joan T. Price, Elizabeth M. Stringer, Bellington Vwalika, David M. Stamilio, and Jeffrey S. A. Stringer
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- 2021
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10. Maternal mid‐upper arm circumference to predict small for gestational age: Findings in a Zambian cohort
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Ashley Appiagyei, Bellington Vwalika, M. Bridget Spelke, Madelyn G. Conner, Chileshe M. Mabula‐Bwalya, Margaret P. Kasaro, Anne West Honart, Andrew Kumwenda, Elizabeth M. Stringer, Jeffrey S. A. Stringer, and Joan T. Price
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Obstetrics and Gynecology ,General Medicine - Abstract
To compare the performance of mid upper arm circumference (MUAC) and body mass index (BMI) for prediction of small for gestational age (SGA) in Zambia.This is a secondary analysis of an ongoing clinical cohort that included women with a single gestation and MUAC measured before 24 weeks of pregnancy. We assessed relationships between maternal MUAC and birth weight centile using regression. The performance of MUAC and BMI to predict SGA was compared using receiver operating characteristic curves and the effect of maternal HIV was investigated in sub-group analyses.Of 1117 participants, 847 (75%) were HIV-negative (HIV-) and 270 (24%) were HIV-positive (HIV+). Seventy-four (7%) delivered severe SGA infants (3rd centile), of whom 56 (76%) were HIV- and 18 (24%) were HIV+ (odds ratio [OR] 1.01, 95% confidence interval [CI] 0.58-1.75). MUAC was associated with higher birth weight centile (+1.2 centile points, 95% CI 0.7-1.6; P 0.001); this relationship was stronger among HIV+ women (+1.7 centile points, 95% CI 0.8-2.6; P 0.001) than HIV- women (+0.9 centile points, 95% CI 0.4-1.4; P = 0.001). The discriminatory power was similar, albeit poor (area under the curve [AUC] 0.7), between MUAC and BMI for the prediction of SGA. In stratified analysis, MUAC and BMI showed excellent discrimination predicting severe SGA among HIV+ (AUC 0.83 and 0.81, respectively) but not among HIV- women (AUC 0.64 and 0.63, respectively).Maternal HIV infection increased the discrimination of both early pregnancy MUAC and BMI for prediction of severe SGA in Zambia.ClinicalTrials.gov (NCT02738892).
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- 2022
11. Visual findings in children exposed to Zika in utero in Nicaragua
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Evelin Martinez, Ryan Max, Filemón Bucardo, Elizabeth M. Stringer, Sylvia Becker-Dreps, Christian Toval-Ruíz, Meylin Chavarria, María J. Meléndez-Balmaceda, Carlos Nuñez, Matthew H. Collins, Michael Boivin, Shiara Ortiz-Pujols, Omar Zepeda, Kaitlyn Cross, Emily W. Gower, Natalie M. Bowman, and Sara F. Grace
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Infectious Diseases ,Public Health, Environmental and Occupational Health - Abstract
Knowledge regarding the frequency of ocular abnormalities and abnormal visual function in children exposed to Zika virus (ZIKV) in utero but born without congenital Zika syndrome (CZS) is limited. We hypothesized that children exposed to ZIKV in utero born without CZS may have visual impairments in early childhood. We performed ophthalmic examination between 16 and 21 months of age and neurodevelopment assessment at 24 months of age with the Mullen Scales of Early Learning test (MSEL) on children enrolled in a cohort born to women pregnant during and shortly after the ZIKV epidemic in Nicaragua (2016–2017). ZIKV exposure status was defined based on maternal and infant serological testing. Visual impairment was defined as abnormal if the child had an abnormal ophthalmic exam and/or low visual reception score in the MSEL assessment. Of 124 children included in the analysis, 24 (19.4%) were classified as ZIKV-exposed and 100 (80.6%) unexposed according to maternal or cord blood serology. Ophthalmic examination showed that visual acuity did not differ significantly between groups, thus, 17.4% of ZIKV-exposed and 5.2% of unexposed had abnormal visual function (p = 0.07) and 12.5% of the ZIKV-exposed and 2% of the unexposed had abnormal contrast testing (p = 0.05). Low MSEL visual reception score was 3.2-fold higher in ZIKV-exposed than unexposed children, but not statistically significant (OR 3.2, CI: 0.8–14.0; p = 0.10). Visual impairment (a composite measure of visual function or low MESL visual reception score) was present in more ZIKV-exposed than in unexposed children (OR 3.7, CI: 1.2, 11.0; p = 0.02). However, the limited sample size warrants future investigations to fully assess the impact of in utero ZIKV exposure on ocular structures and visual function in early childhood, even in apparently healthy children.
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- 2023
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12. Single-center serological surveillance of SARS-CoV-2 in pregnant patients presenting to labor and delivery
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Kim A. Boggess, Elizabeth M. Stringer, Whitney R. Robinson, M. Cristina Munoz, William H. Goodnight, Lisa Rahangdale, Neeta L. Vora, Alan J. Rosenbaum, Vidhya Bala, Amber Ivins, Tara M. Narowski, Ramesh Jadi, and Lakshmanane Premkumar
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Obstetrics and Gynecology ,General Medicine - Abstract
To measure maternal/fetal SARS-CoV-2 antibody levels.A prospective observational study of eligible parturients admitted to the hospital for infant delivery was conducted between April and September 2020. SARS-CoV-2 antibody levels were measured in maternal and umbilical cord specimens using an in-house ELISA based on the receptor-binding domain (RBD) of the spike protein. Among SARS-CoV-2 seropositive patients, spike RBD antibody isotypes (IgG, IgM, and IgA) and ACE2 inhibiting antibodies were measured.In total, 402 mothers were enrolled and spike RBD antibodies in 388 pregnancies were measured (336 maternal and 52 cord specimens). Of them, 19 were positive (15 maternal, 4 cord) resulting in a seroprevalence estimate of 4.8% (95% confidence interval 2.9-7.4). Of the 15 positive maternal specimens, all had cord blood tested. Of the 15 paired specimens, 14 (93.3%) were concordant. Four of the 15 pairs were from symptomatic mothers, and all four showed high spike-ACE2 blocking antibody levels, compared to only 3 of 11 (27.3%) from asymptomatic mothers.A variable antibody response to SARS-CoV-2 in pregnancy among asymptomatic infections compared to symptomatic infections was found, the significance of which is unknown. Although transfer of transplacental neutralizing antibodies occurred, additional research is needed to determine how long maternal antibodies can protect the infant against SARS-CoV-2 infection.
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- 2022
13. Interpersonal therapy versus antidepressant medication for treatment of postpartum depression and anxiety among women with HIV in Zambia: a randomized feasibility trial
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M. Bridget Spelke, Ravi Paul, Bryan S. Blette, Samantha Meltzer‐Brody, Crystal E. Schiller, J. M. Ncheka, Margaret P. Kasaro, Joan T. Price, Jeffrey S. A. Stringer, and Elizabeth M. Stringer
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Depression, Postpartum ,Infectious Diseases ,Public Health, Environmental and Occupational Health ,Feasibility Studies ,Humans ,Zambia ,Female ,HIV Infections ,Pilot Projects ,Anxiety ,Pandemics ,Antidepressive Agents - Abstract
Postpartum depression (PPD) is a prevalent and debilitating disease that may affect medication adherence and thus maternal health and vertical transmission among women with HIV. We assessed the feasibility of a trial of interpersonal psychotherapy (IPT) versus antidepressant medication (ADM) to treat PPD and/or anxiety among postpartum women with HIV in Lusaka, Zambia.Between 29 October 2019 and 8 September 2020, we pre-screened women 6-8 weeks after delivery with the Edinburgh Postnatal Depression Scale (EPDS) and diagnosed PPD or anxiety with the Mini International Neuropsychiatric Interview. Consenting participants were randomized 1:1 to up to 11 sessions of IPT or daily self-administered sertraline and followed for 24 weeks. We assessed EPDS score, Clinical Global Impression-Severity of Illness (CGI-S) and medication side effects at each visit and measured maternal HIV viral load at baseline and final study visit. Retention, visit adherence, change in EPDS, CGI-S and log viral load were compared between groups with t-tests and Wilcoxon signed rank tests; we report mean differences, relative risks and 95% confidence intervals. A participant satisfaction survey assessed trial acceptability.78/80 (98%) participants were retained at the final study visit. In the context of the COVID-19 pandemic, visit adherence was greater among women allocated to ADM (9.9 visits, SD 2.2) versus IPT (8.9 visits, SD 2.4; p = 0.06). EPDS scores decreased from baseline to final visit overall, though mean change was greater in the IPT group (-13.8 points, SD 4.7) compared to the ADM group (-11.4 points, SD 5.5; p = 0.04). Both groups showed similar changes in mean log viral load from baseline to final study visit (mean difference -0.43, 95% CI -0.32, 1.18; p = 0.48). In the IPT group, viral load decreased significantly from baseline (0.9 log copies/ml, SD 1.7) to final visit (0.2 log copies/ml, SD 0.9; p = 0.01).This pilot study demonstrates that a trial of two forms of PPD treatment is feasible and acceptable among women with HIV in Zambia. IPT and ADM both improved measures of depression severity; however, a full-scale trial is required to determine whether treatment of PPD and anxiety improves maternal-infant HIV outcomes.
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- 2022
14. Neurodevelopmental Outcomes of Children Following In Utero Exposure to Zika in Nicaragua
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Evelin Martinez, Bryan Blette, Marlen Morales, Omar Zepeda, Michael J. Boivin, Filemon Bucardo, Christian Eduardo Toval Ruiz, Sylvia Becker-Dreps, Michael G. Hudgens, Natalie M. Bowman, Barbara D. Goldman, Jeffrey S. A. Stringer, Shiara Ortiz-Pujols, Elizabeth M. Stringer, Daniel Westreich, Matthew H. Collins, Aravinda M. de Silva, Meylin Chavarria, and Itziar Familiar
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Microbiology (medical) ,Pediatrics ,medicine.medical_specialty ,Nicaragua ,Asymptomatic ,Zika virus ,03 medical and health sciences ,0302 clinical medicine ,Zika ,children ,Pregnancy ,medicine ,Humans ,Medical history ,030212 general & internal medicine ,Prospective Studies ,Pregnancy Complications, Infectious ,Prospective cohort study ,Online Only Articles ,Child ,biology ,business.industry ,Zika Virus Infection ,Infant, Newborn ,Gestational age ,neurodevelopmental outcome ,Infant ,Zika Virus ,Anthropometry ,biology.organism_classification ,Infectious Diseases ,AcademicSubjects/MED00290 ,In utero ,Female ,medicine.symptom ,business ,Neurocognitive ,030217 neurology & neurosurgery - Abstract
Background Neurodevelopmental outcomes of asymptomatic children exposed to Zika virus (ZIKV) in utero are not well characterized. Methods We prospectively followed 129 newborns without evidence of congenital Zika syndrome (CZS) up to 24 months of age. Participants were classified as ZIKV exposed or ZIKV unexposed. The Mullen Scales of Early Learning (MSEL) was administered in the participants’ homes at 6, 12, 15, 18, 21, and 24 months of age by trained psychologists. Sociodemographic data, medical history, and infant anthropometry at birth were collected at each home visit. Our primary outcome was the Mullen Early Learning Composite Score (ECL) at 24 months of age between our 2 exposure groups. Secondary outcomes were differences in MSEL subscales over time and at 24 months. Results Of 129 infants in whom exposure status could be ascertained, 32 (24.8%) met criteria for in utero ZIKV exposure and 97 (75.2%) did not. There were no differences in maternal age, maternal educational attainment, birthweight, or gestational age at birth between the 2 exposure groups. The adjusted means and standard errors (SEs) for the ELC score between the ZIKV-exposed children compared to ZIKV-unexposed children were 91.4 (SE, 3.1) vs 96.8 (SE, 2.4) at 12 months and 93.3 (SE, 2.9) vs 95.9 (SE, 2.3) at 24 months. In a longitudinal mixed model, infants born to mothers with an incident ZIKV infection (P = .01) and low-birthweight infants (, Children with in utero Zika virus exposure and without congenital Zika syndrome in Nicaragua had lower neurocognitive scores at 24 months. Our study includes multiple evaluations over time and a contemporary nonexposed comparator group of children, which is currently lacking in the literature.
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- 2021
15. Maternal HIV, antiretroviral timing, and spontaneous preterm birth in an urban Zambian cohort: the role of local and systemic inflammation
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John Mwale, Elizabeth M. Stringer, Michael G. Hudgens, Jeffrey S. A. Stringer, Kristina De Paris, Julie A. E. Nelson, Humphrey Mwape, Katelyn J. Rittenhouse, Gabriel Chipili, Bellington Vwalika, and Joan T. Price
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0301 basic medicine ,medicine.medical_specialty ,Multivariate analysis ,Art initiation ,Immunology ,Zambia ,HIV Infections ,Inflammation ,Maternal hiv ,Systemic inflammation ,Article ,03 medical and health sciences ,0302 clinical medicine ,Pregnancy ,Gestational Weeks ,medicine ,Humans ,Immunology and Allergy ,030212 general & internal medicine ,Pregnancy Complications, Infectious ,business.industry ,Obstetrics ,Infant, Newborn ,medicine.disease ,030104 developmental biology ,Infectious Diseases ,Anti-Retroviral Agents ,Cohort ,Premature Birth ,Female ,medicine.symptom ,business - Abstract
OBJECTIVE To assess plasma and vaginal inflammation in three antenatal groups (HIV-uninfected women, HIV-infected women entering care on preconceptional ART, and HIV-infected women not on preconceptional ART) and whether these measures are associated with spontaneous preterm birth (sPTB). DESIGN Case--control study nested within a pregnancy cohort in Lusaka, Zambia. METHODS We analyzed 11 pro-inflammatory and two anti-inflammatory markers in 207 women with paired plasma and vaginal specimens collected between 16 and 20 gestational weeks. Among 51 HIV-infected women, we repeated the assays in 24-34-week samples. We used confirmatory factor analysis to create inflammation scores and compared them among the three groups. RESULTS At baseline, HIV-infected women not on ART had higher vaginal pro-inflammatory scores than HIV-uninfected women [mean 0.37 (95% CI -0.06 to 0.80) vs. -0.02 (-0.32 to 0.27), P = 0.02]. In repeat testing, women not on preconceptional ART had an increase in vaginal inflammation between the baseline and 24-34-week visits compared with those continuing preconceptional ART [mean 0.62 (95% CI -0.80 to 4.20) vs. -0.07 (-2.78 to 2.11), P = 0.04]. In multivariate analyses, baseline vaginal inflammation predicted sPTB (aOR 1.5; 95% CI 1.0-2.3; P = 0.02). Plasma inflammation did not differ by HIV or ART exposure and was not associated with sPTB. CONCLUSION Women not receiving ART at entry into pregnancy care had more vaginal inflammation than women entering on treatment. They also experienced an increase in vaginal inflammation between the two sampling timepoints, possibly as a consequence of ART initiation. Vaginal (but not systemic) inflammation was associated with sPTB and offers a potential mechanistic insight into this important adverse birth outcome.
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- 2020
16. AI Estimation of Gestational Age from Blind Ultrasound Sweeps in Low-Resource Settings
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Teeranan Pokaprakarn, Juan C. Prieto, Joan T. Price, Margaret P. Kasaro, Ntazana Sindano, Hina R. Shah, Marc Peterson, Mutinta M. Akapelwa, Filson M. Kapilya, Yuri V. Sebastião, William Goodnight, Elizabeth M. Stringer, Bethany L. Freeman, Lina M. Montoya, Benjamin H. Chi, Dwight J. Rouse, Stephen R. Cole, Bellington Vwalika, Michael R. Kosorok, and Jeffrey S. A. Stringer
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Article - Abstract
BACKGROUND: Ultrasound is indispensable to gestational age estimation and thus to quality obstetrical care, yet high equipment cost and the need for trained sonographers limit its use in low-resource settings. METHODS: From September 2018 through June 2021, we recruited 4695 pregnant volunteers in North Carolina and Zambia and obtained blind ultrasound sweeps (cineloop videos) of the gravid abdomen alongside standard fetal biometry. We trained a neural network to estimate gestational age from the sweeps and, in three test data sets, assessed the performance of the artificial intelligence (AI) model and biometry against previously established gestational age. RESULTS: In our main test set, the mean absolute error (MAE) (±SE) was 3.9±0.12 days for the model versus 4.7±0.15 days for biometry (difference, −0.8 days; 95% confidence interval [CI], −1.1 to −0.5; P
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- 2022
17. Infection With a Novel Rickettsiella Species in Emperor Scorpions (Pandinus imperator)
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Janet E. Hill, Elizabeth M. Stringer, Yanyun Huang, Dan S Bradway, Aníbal G. Armién, Sushan Han, Alisa L. Newton, and Champika Fernando
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0303 health sciences ,General Veterinary ,biology ,030306 microbiology ,Rickettsiella ,Coxiellaceae ,Midgut ,Vacuole ,biology.organism_classification ,Microbiology ,03 medical and health sciences ,Pandinus ,Pathogen ,Bacteria ,030304 developmental biology ,Emperor scorpion - Abstract
Rickettsiella infection was diagnosed in 4 adult emperor scorpions ( Pandinus imperator) from 2 different collections over a 3-year period. One case had a 2-day history of weakness, failure to lift the tail, or respond to stimulation, with rapid progression to death. The other 3 cases were found dead. There were no gross lesions, but histologically the hemolymphatic vasculature and sinuses, presumed hematopoietic organ, heart, midgut and midgut diverticula, nerves, and skeletal muscle were infiltrated with phagocytic and granular hemocytes with necrosis. Phagocytic hemocytes contained abundant intracellular microorganisms that were Fite’s acid-fast-positive, Macchiavello-positive, variably gram-positive or gram-negative, and Grocott’s methenamine silver-negative. By transmission electron microscopy, hemocytes contained numerous phagocytic vacuoles with small dense bacterial forms (mean 0.603 × 0.163 μm) interspersed with large bacterial forms (mean 1.265 × 0.505 μm) and few intermediary forms with electron-dense nucleoids and membrane-bound crystalline arrays (average 4.72 μm). Transmission electron microscopy findings were consistent with bacteria of the family Coxiellaceae. Based on sequencing the 16S ribosomal RNA gene, the identity was confirmed as Rickettsiella, and phylogenetic analysis of protein-coding genes gidA, rspA, and sucB genes suggested the emperor scorpion pathogen as a new species. This study identifies a novel Rickettsiella causing infection in emperor scorpions and characterizes the unique pathological findings of this disease. We suggest this organism be provisionally named Rickettsiella scorpionisepticum.
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- 2020
18. Risk of Adverse Birth Outcomes in Two Cohorts of Pregnant Women With HIV in Zambia
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Joan T. Price, Yuri V. Sebastião, Bellington Vwalika, Stephen R. Cole, Felistas M. Mbewe, Winifreda M. Phiri, Bethany L. Freeman, Margaret P. Kasaro, Marc Peterson, Dwight J. Rouse, Elizabeth M. Stringer, and Jeffrey S. A. Stringer
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Pregnancy Complications ,Epidemiology ,Pregnancy ,Infant, Newborn ,Pregnancy Outcome ,Humans ,Premature Birth ,Zambia ,Female ,HIV Infections ,Pregnant Women ,Article - Abstract
A trial of progesterone to prevent preterm birth among HIV-infected Zambian women [Improving Pregnancy Outcomes with Progesterone (IPOP)] found no treatment effect, but the risk of the primary outcome was among the lowest ever documented in women with HIV. In this secondary analysis, we compare the risks of preterm birth (37 weeks), stillbirth, and a composite primary outcome comprising the two in IPOP versus an observational pregnancy cohort [Zambian Preterm Birth Prevention Study (ZAPPS)] in Zambia, to evaluate reasons for the low risk in IPOP.Both studies enrolled women before 24 gestational weeks, during August 2015-September 2017 (ZAPPS) and February 2018-January 2020 (IPOP). We used linear probability and log-binomial regression to estimate risk differences and risk ratios (RR), before and after restriction and standardization with inverse probability weights.The unadjusted risk of composite outcome was 18% in ZAPPS (N = 1450) and 9% in IPOP (N = 791) (RR = 2.0; 95% CI = 1.6, 2.6). After restricting and standardizing the ZAPPS cohort to the distribution of IPOP baseline characteristics, the risk remained higher in ZAPPS (RR = 1.6; 95% CI = 1.0, 2.4). The lower risk of preterm/stillbirth in IPOP was only partially explained by measured risk factors.Possible benefits in IPOP of additional monetary reimbursement, more frequent visits, and group-based care warrant further investigation.
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- 2022
19. Deep learning to estimate gestational age from blind ultrasound sweeps of the gravid abdomen
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Lina Montoya, Filson M Kapilya, Margaret P Kasaro, Hina R Shah, Jeffrey S. A. Stringer, Michael R. Kosorok, Stephen R. Cole, Bethany L. Freeman, Joan T. Price, Bellington Vwalika, Teeranan Pokaprakarn, Dwight J. Rouse, Marc Peterson, Benjamin H. Chi, William Goodnight, Mutinta M Akapelwa, Yuri V. Sebastião, Ntazana Sindano, Juan Prieto, and Elizabeth M. Stringer
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medicine.medical_specialty ,business.industry ,Obstetrics ,Ultrasound ,Mean absolute error ,Gestational age ,Obstetric care ,ESTIMATED GESTATIONAL AGE ,Standard error ,medicine.anatomical_structure ,Fetal biometry ,medicine ,Abdomen ,business - Abstract
BackgroundUltrasound is indispensable to gestational age estimation, and thus to quality obstetric care, yet high equipment cost and need for trained sonographers limit its use in low-resource settings.MethodsFrom September 2018 through June 2021, we recruited 4,695 pregnant volunteers in North Carolina and Zambia and obtained blind ultrasound sweeps (cineloops) of the gravid abdomen alongside standard fetal biometry. We trained a neural network to estimate gestational age from the sweeps and, in three test sets, assessed performance of the model and biometry against previously established gestational age.ResultsIn our main test set, model mean absolute error (MAE) was 3.9 days (standard error [SE] 0.12) vs. 4.7 days (SE 0.15) for biometry (difference -0.8 days; 95% CI -1.1, -0.5; pConclusionsOur model estimated gestational age more accurately from blindly obtained ultrasound sweeps than did trained sonographers performing fetal biometry. These results presage a future where all pregnant people – not just those in rich countries – can access the diagnostic benefits of sonography.
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- 2021
20. IJGO in 2021: A year of growth and development
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Amy Goggins, Michael Geary, and Elizabeth M. Stringer
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Obstetrics ,medicine.medical_specialty ,business.industry ,Gynecology ,Family medicine ,MEDLINE ,Obstetrics and Gynecology ,Medicine ,Humans ,General Medicine ,Growth and Development ,business - Published
- 2021
21. Contemporary Issues in Women's Health
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Elizabeth M. Stringer and Ashraf Nabhan
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Humans ,Women's Health ,Obstetrics and Gynecology ,Female ,General Medicine - Published
- 2022
22. Emergency Care Utilization Among Pregnant Medicaid Recipients in North Carolina: An Analysis Using Linked Claims and Birth Records
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Elizabeth M. Stringer, Jill Ruppenkamp, Catherine J. Vladutiu, Veni Kandasamy, and M. Kathryn Menard
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Adult ,Emergency Medical Services ,medicine.medical_specialty ,Adolescent ,Epidemiology ,Cohort Studies ,Insurance Claim Review ,03 medical and health sciences ,0302 clinical medicine ,Pregnancy ,Health care ,North Carolina ,medicine ,Humans ,030212 general & internal medicine ,Retrospective Studies ,030219 obstetrics & reproductive medicine ,Medicaid ,business.industry ,Public health ,Public Health, Environmental and Occupational Health ,Obstetrics and Gynecology ,Retrospective cohort study ,Emergency department ,Patient Acceptance of Health Care ,medicine.disease ,Triage ,United States ,Birth Certificates ,Pediatrics, Perinatology and Child Health ,Emergency medicine ,Cohort ,Female ,business - Abstract
Objectives To estimate the rate of pregnancy-associated emergency care visits and identify maternal and pregnancy characteristics associated with high utilization of emergency care among pregnant Medicaid recipients in North Carolina. Methods A retrospective cohort study using linked Medicaid hospital claims and birth records of 107,207 pregnant Medicaid recipients who delivered a live-born infant in North Carolina between January 1, 2008 and December 31, 2009. Rates were estimated per 1000 member months of Medicaid coverage. High utilization was defined as ≥ 4 visits. Emergency care visits included encounters in the emergency department or obstetric triage unit during pregnancy that did not result in hospital admission. Results During the study period, 57.5% of pregnant Medicaid recipients sought emergency care at least once during pregnancy. There were 171,909 emergency care visits with an overall rate of 202.3 visits per 1000 member months. Among the subset of pregnant women with Medicaid coverage for the majority of their pregnancy (n = 75,157), 18.1% were high utilizers. High emergency care utilization was associated with young age, black race, lower education, tobacco use, late preterm delivery, multifetal gestation, and having ≥ 1 comorbidity. Threatened labor and abdominal pain were the leading indications for visits. Conclusion Utilization of hospital-based emergency care services was common in this cohort of pregnant Medicaid recipients. Additional research is needed to assess the drivers for accessing care through the emergency department, and to examine differences in pregnancy outcomes and health care costs between high and low utilizers.
- Published
- 2019
23. An automated framework for image classification and segmentation of fetal ultrasound images for gestational age estimation
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Hina R Shah, Patrick Musonda, Juan Prieto, Joan T. Price, Xiaoning Jiang, Alan J. Rosenbaum, David M. Stamilio, Bellington Vwalika, Elizabeth M. Stringer, and Jeffrey S. A. Stringer
- Subjects
Crown-rump length ,Observational error ,Contextual image classification ,business.industry ,Computer science ,Gestational age ,Pattern recognition ,Article ,Sonographer ,Calipers ,Leverage (statistics) ,Segmentation ,Artificial intelligence ,business - Abstract
Accurate assessment of fetal gestational age (GA) is critical to the clinical management of pregnancy. Industrialized countries rely upon obstetric ultrasound (US) to make this estimate. In low- and middle- income countries, automatic measurement of fetal structures using a low-cost obstetric US may assist in establishing GA without the need for skilled sonographers. In this report, we leverage a large database of obstetric US images acquired, stored and annotated by expert sonographers to train algorithms to classify, segment, and measure several fetal structures: biparietal diameter (BPD), head circumference (HC), crown rump length (CRL), abdominal circumference (AC), and femur length (FL). We present a technique for generating raw images suitable for model training by removing caliper and text annotation and describe a fully automated pipeline for image classification, segmentation, and structure measurement to estimate the GA. The resulting framework achieves an average accuracy of 93% in classification tasks, a mean Intersection over Union accuracy of 0.91 during segmentation tasks, and a mean measurement error of 1.89 centimeters, finally leading to a 1.4 day mean average error in the predicted GA compared to expert sonographer GA estimate using the Hadlock equation.
- Published
- 2021
24. Seroreduction of syphilis non-treponemal titers during pregnancy for women with and without HIV co-infection
- Author
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Carolyn M. Webster, Margaret P. Kasaro, Joan T. Price, Elizabeth M. Stringer, Christopher A. Wiesen, Bellington Vwalika, and Jeffrey S. A. Stringer
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Coinfection ,Infant, Newborn ,Pregnancy Outcome ,Obstetrics and Gynecology ,HIV Infections ,General Medicine ,Article ,Syphilis Serodiagnosis ,Pregnancy ,Humans ,Premature Birth ,Female ,Prospective Studies ,Syphilis ,Pregnancy Complications, Infectious ,Reagins - Abstract
To evaluate the effect of HIV co-infection on non-treponemal titers during pregnancy in women with syphilis.This is a secondary analysis of pregnant women with syphilis in the prospective, observational Zambian Preterm Birth Prevention Study (ZAPPS). Treponemal (Treponema pallidum particle agglutination) and non-treponemal (rapid plasma reagin; RPR) testing were performed on serum biospecimens, resulting in 47 participants with serologically confirmed syphilis (27 HIV-positive, 20 HIV-negative). The primary outcome, achievement of RPR titer seroreduction during pregnancy, was analyzed by logistic regression. Secondary outcomes included overall titer reduction, seroreduction rate, serologic cure, and adverse pregnancy outcomes.Seroreduction of RPR titer occurred in 78% (21/27) of women with HIV versus 45% (9/20) of women without (adjusted odds ratio 4.66; 95% confidence interval [CI] 1.14 - 19.08). Overall RPR titer reduction, rate of seroreduction per week, and the proportion achieving serologic cure each trended higher among women with HIV compared with those without HIV. There was a trend toward decreased stillbirth incidence in participants achieving seroreduction (odds ratio 0.15, 95% CI 0.01-1.58).HIV co-infection in this cohort of Zambian women with syphilis was associated with greater odds of RPR titer seroreduction during pregnancy. Pregnant women with syphilis and HIV may not be at increased risk for a delayed syphilis treatment response compared with women without HIV.
- Published
- 2021
25. Low‐ and middle‐income country abstract representation at the Society for Maternal Fetal Medicine Annual Pregnancy Meeting
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Jamil Kazma, Alexis C. Gimovsky, Homa K. Ahmadzia, Monica Saleeb, Elizabeth M. Stringer, and Savita Potarazu
- Subjects
medicine.medical_specialty ,Pregnancy ,business.industry ,Representation (systemics) ,Obstetrics and Gynecology ,General Medicine ,medicine.disease ,Perinatology ,Maternal-fetal medicine ,Obstetrics ,Pregnancy Complications ,Income ,medicine ,Humans ,Female ,Low and middle income ,business ,Demography - Published
- 2021
26. Serologic surveillance of maternal Zika infection in a prospective cohort in Leon, Nicaragua during the peak of the Zika epidemic
- Author
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Matthew H. Collins, Aravinda M. de Silva, Filemon Bucardo, Magelda Montoya-Cruz, Bryan Blette, Marlen Morales, Guei-Jiun Alice Liou, Jeffrey S. A. Stringer, Omar Zepeda, Ramesh Jadi, Sylvia Becker-Dreps, Elizabeth M. Stringer, Eva Harris, and Rigoberto Pérez
- Subjects
RNA viruses ,0301 basic medicine ,Pediatrics ,Time Factors ,Physiology ,Maternal Health ,Nicaragua ,Pathology and Laboratory Medicine ,Geographical locations ,Dengue fever ,Zika virus ,Cohort Studies ,Labor and Delivery ,Families ,0302 clinical medicine ,Pregnancy ,Medicine and Health Sciences ,Prospective Studies ,030212 general & internal medicine ,Children ,Multidisciplinary ,biology ,Zika Virus Infection ,Obstetrics and Gynecology ,Body Fluids ,Flavivirus ,Serology ,Blood ,Medical Microbiology ,Viral Pathogens ,Epidemiological Monitoring ,Viruses ,Cohort ,Medicine ,Female ,Pathogens ,Anatomy ,Infants ,Research Article ,Neglected Tropical Diseases ,Cohort study ,Adult ,medicine.medical_specialty ,Adolescent ,Science ,030106 microbiology ,Mothers ,Prenatal care ,Microbiology ,Young Adult ,03 medical and health sciences ,medicine ,Humans ,Seroprevalence ,Serologic Tests ,Epidemics ,Microbial Pathogens ,Biology and life sciences ,Flaviviruses ,business.industry ,Organisms ,Central America ,Zika Virus ,Tropical Diseases ,Zika Fever ,biology.organism_classification ,medicine.disease ,Age Groups ,People and Places ,North America ,Birth ,Women's Health ,Population Groupings ,business - Abstract
BackgroundZika virus caused thousands of congenital anomalies during a recent epidemic. Because Zika emerged in areas endemic for dengue and these related flaviviruses elicit cross-reactive antibodies, it is challenging to serologically monitor pregnant women for Zika infection.MethodsA prospective cohort of 253 pregnant women was established in León, Nicaragua. Women were followed during prenatal care through delivery. Serologic specimens were obtained at each visit, and birth outcome was recorded. Established flavivirus serologic methods were adapted to determine Zika seroprevalence, and a stepwise testing algorithm estimated timing of Zika infection in relation to pregnancy.ResultsZika seroprevalence was approximately 59% among women tested. Neutralization testing was highly concordant with Zika NS1 BOB results. Per study algorithm, 21% (40/187) of women were classified as experiencing Incident ZIKV infection during pregnancy. Importantly, the Incident ZIKV group included mostly women pregnant during the 2016 Zika epidemic peak and the only 3 subjects in the cohort with RT-PCR-confirmed infections. Approximately 17% of births had complications; 1.5% (3/194) manifesting clinical criteria of congenital Zika syndrome, one was RT-PCR-confirmed as a case of congenital Zika syndrome. Adverse birth outcome did not correlate with timing of Zika infection.ConclusionsBy leveraging prenatal care systems, we developed a simple algorithm for identifying women who were likely infected by Zika during pregnancy.
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- 2020
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27. Adverse birth outcomes and their clinical phenotypes in an urban Zambian cohort [version 2; peer review: 2 approved]
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Joan T Price, Bellington Vwalika, Katelyn J Rittenhouse, Humphrey Mwape, Jennifer Winston, Bethany L Freeman, Ntazana Sindano, Elizabeth M Stringer, Margaret P Kasaro, Benjamin H Chi, and Jeffrey SA Stringer
- Subjects
lcsh:R ,lcsh:Medicine - Abstract
Background: Few cohort studies of pregnancy in sub-Saharan Africa use rigorous gestational age dating and clinical phenotyping. As a result, incidence and risk factors of adverse birth outcomes are inadequately characterized. Methods: The Zambian Preterm Birth Prevention Study (ZAPPS) is a prospective observational cohort established to investigate adverse birth outcomes at a referral hospital in urban Lusaka. This report describes ZAPPS phase I, enrolled August 2015 to September 2017. Women were followed through pregnancy and 42 days postpartum. At delivery, study staff assessed neonatal vital status, birthweight, and sex, and assigned a delivery phenotype. Primary outcomes were: (1) preterm birth (PTB; delivery
- Published
- 2020
28. 976 The utility of third trimester fetal biometry in predicting SGA infants in a zambian population
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Ashley Appiagyei, Joan T. Price, Andrew Kumwenda, Mwansa Ketty Lubeya, Anne West Honart, Bellington Vwalika, Emily Reichert, Jeffrey S. A. Stringer, and Elizabeth M. Stringer
- Subjects
medicine.medical_specialty ,education.field_of_study ,Fetal biometry ,Obstetrics ,business.industry ,Population ,medicine ,Obstetrics and Gynecology ,business ,Third trimester ,education - Published
- 2021
29. Operationalizing 17α-Hydroxyprogesterone Caproate to Prevent Recurrent Preterm Birth
- Author
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Elizabeth M. Stringer, Priya Batra, Catherine J Vladutiu, M. Kathryn Menard, and Jeffrey S. A. Stringer
- Subjects
medicine.medical_specialty ,education.field_of_study ,Pregnancy ,030219 obstetrics & reproductive medicine ,Singleton ,business.industry ,Obstetrics ,Public health ,Population ,Obstetrics and Gynecology ,17α-Hydroxyprogesterone ,Prenatal care ,medicine.disease ,03 medical and health sciences ,0302 clinical medicine ,Premature birth ,030225 pediatrics ,medicine ,Gestation ,education ,business ,medicine.drug - Abstract
Each year in the United States, more than 500,000 neonates are born before 37 weeks of gestation. Women who have experienced a previous preterm birth are at high risk of recurrence. A weekly prenatal injection of 17α-hydroxyprogesterone caproate decreases the risk of recurrent preterm birth and is recommended from as early as 16 weeks of gestation in women carrying singleton pregnancies who have a history of spontaneous singleton preterm birth. A commonly used metric for public health program effectiveness is population coverage of an intervention. In the case of 17α-hydroxyprogesterone caproate, population coverage can be defined as the proportion of women who are eligible for 17α-hydroxyprogesterone caproate (ie, previous pregnancy complicated by spontaneous singleton preterm birth) who actually receive the intervention. To receive a full course of 17α-hydroxyprogesterone caproate, women must negotiate a complex series of steps that includes presenting early for prenatal care, being identified as eligible for 17α-hydroxyprogesterone caproate, being offered 17α-hydroxyprogesterone caproate, accepting 17α-hydroxyprogesterone caproate, and adhering to the weekly 17α-hydroxyprogesterone caproate dose schedule. We describe this series of steps as well potential solutions to increase 17α-hydroxyprogesterone caproate coverage.
- Published
- 2016
30. An Overview of Advances in Global Maternal Health: From Broad to Specific Improvements
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Juliana Stone, Homa K. Ahmadzia, Elizabeth M. Stringer, Maria Small, and Najma Khorrami
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Economic growth ,medicine.medical_specialty ,United Nations ,Maternal Health ,Prenatal care ,Global Health ,Midwifery ,Essential medicines ,03 medical and health sciences ,0302 clinical medicine ,Pregnancy ,030202 anesthesiology ,eHealth ,Global health ,Humans ,Medicine ,030212 general & internal medicine ,mHealth ,Perinatal Mortality ,Sustainable development ,030219 obstetrics & reproductive medicine ,business.industry ,Public health ,Obstetrics and Gynecology ,Prenatal Care ,General Medicine ,Sustainable Development ,Millennium Development Goals ,Maternal Mortality ,Female ,business - Abstract
After the declaration of the Millennium Development Goals in 2000 by the United Nations, many stakeholders allocated financial resources to "global maternal health." Research to expand care and improve delivery of maternal health services has exponentially increased. The present article highlights an overview, namely 10 of the health system, clinical, and technology-based advancements that have occurred in the past three decades in the field of global maternal health. The list of topics has been selected through the cumulative clinical and public health expertise of the authors and is certainly not exhaustive. Rather, the list is intended to provide a mapping of key topics arranged from broad to specific that span from the global policy level to the level of individual care. The list of health system, clinical, and technology-based advancements include: (10) Millennium Development Goals and Sustainable Development Goals; (9) Development of clinical training programs, including the potential for subspecialty development; (8) Prenatal care expansion and potential; (7) Decentralized health systems, including the use of skilled birth attendants; (6) Antiretroviral therapy for HIV; (5) Essential medicines; (4) Vaccines; (3) mHealth/eHealth; (2) Ultrasonography; and (1) Obstetric hemorrhage management. With the Sustainable Development Goals now underway, the field must build upon past successes to sustain maternal and neonatal well-being in the future global health agenda.
- Published
- 2019
31. Is there a silver lining to the Zika virus epidemic in the Americas?
- Author
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Sylvia Becker-Dreps, Elizabeth M. Stringer, Michael J. Boivin, Natalie M. Bowman, and Filemon Bucardo
- Subjects
biology ,business.industry ,Extramural ,Zika Virus Infection ,Zika Virus ,biology.organism_classification ,Virology ,Communicable Diseases, Emerging ,Article ,Zika virus ,Infectious Diseases ,Pregnancy ,Microcephaly ,Medicine ,Humans ,Female ,Americas ,Pregnancy Complications, Infectious ,business ,Epidemics - Published
- 2019
32. Misclassification in defining and diagnosing microcephaly
- Author
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Elizabeth T Rogawski McQuade, Mariah M Kalmin, Emily W. Gower, Natalie M. Bowman, Daniel Westreich, and Elizabeth M. Stringer
- Subjects
Pediatrics ,medicine.medical_specialty ,Microcephaly ,Percentile ,Epidemiology ,Cephalometry ,Article ,Zika virus ,Disease Outbreaks ,03 medical and health sciences ,0302 clinical medicine ,Pregnancy ,medicine ,Humans ,030212 general & internal medicine ,Pregnancy Complications, Infectious ,Confusion ,030219 obstetrics & reproductive medicine ,biology ,business.industry ,Zika Virus Infection ,Infant, Newborn ,medicine.disease ,biology.organism_classification ,Predictive value ,Head circumference ,Pediatrics, Perinatology and Child Health ,Female ,medicine.symptom ,business - Abstract
Background Several health agencies define microcephaly for surveillance purposes using a single criterion, a percentile or Z-score cut-off for newborn head circumference. This definition, however, conflicts with the reported prevalence of microcephaly even in populations with endemic Zika virus. Objective We explored possible reasons for this conflict, hypothesising that the definition of microcephaly used in some studies may be incompletely described, lacking the additional clinical criteria that clinicians use to make a formal diagnosis. We also explored the potential for misclassification that can result from differences in these definitions, especially when applying a percentile cut-off definition in the presence of the much lower observed prevalence estimates that we believe to be valid. Methods We conducted simulations under a theoretical bimodal distribution of head circumference. For different definitions of microcephaly, we calculated the sensitivity and specificity using varying cut-offs of head circumference. We then calculated and plotted the positive predictive value for each of these definitions by prevalence of microcephaly. Results Simple simulations suggest that if the true prevalence of microcephaly is approximately what is reported in peer-reviewed literature, then relying on cut-off-based definitions may lead to very poor positive predictive value under realistic conditions. Conclusions While a simple head circumference criterion may be used in practice as a screening or surveillance tool, the definition lacks clarification as to what constitutes true pathological microcephaly and may lead to confusion about the true prevalence of microcephaly in Zika-endemic areas, as well as bias in aetiologic studies.
- Published
- 2019
33. A Review of Gynecologic Oncology in the Global Setting: Educating and Training the Next Generation of Women's Health Providers
- Author
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Linda Van Le, Elizabeth M. Stringer, and Stephanie A. Sullivan
- Subjects
medicine.medical_specialty ,MEDLINE ,Uterine Cervical Neoplasms ,Gynecologic oncology ,Global Health ,Medical Oncology ,03 medical and health sciences ,International education ,0302 clinical medicine ,Obstetrics and gynaecology ,medicine ,Global health ,Humans ,030212 general & internal medicine ,030219 obstetrics & reproductive medicine ,business.industry ,Obstetrics and Gynecology ,Capacity building ,Internship and Residency ,General Medicine ,Gynecology ,Family medicine ,Uterine Neoplasms ,Women's Health ,Female ,Clinical Competence ,business ,Healthcare providers ,Gynecologic Oncologist - Abstract
Importance Women in low- and middle-income countries (LMICs) are responsible for the stability of their families. Child survival is directly linked to the health and well-being of their mother. Cancer is the leading cause of morbidity and mortality worldwide, and the incidence and mortality for women from cancer are projected to increase over the coming decades. Gynecologic cancer outcomes are improved when women are cared for by a gynecologic oncologist; however, there are limited specialized providers in LMICs. Increasing interest and involvement from specialists in the United States will improve partnerships abroad and the care of women worldwide. Objective To summarize the importance of global gynecologic oncology care and the current data for US trainees in obstetrics and gynecology to participate in clinical and capacity-building opportunities. Evidence acquisition We performed a PubMed literature search for articles pertaining to the topic of global health education in obstetrics and gynecology and gynecologic oncology specifically. Results Many obstetric and gynecologic residency programs offer international opportunities, but these are less than those in other specialties and are more frequently focused in obstetrics. Many gynecologic oncology fellowship programs offer international experiences for fellows; however, the time and resources required are limited. Several US and international programs are ongoing to improve capacity building for gynecologic oncology in LMICs with local trainees. Conclusions and relevance Training and care in gynecologic oncology care worldwide are improving through efforts at multiple levels. Continued efforts are needed to improve US trainee international education and experience.
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- 2019
34. Matern Child Health J
- Author
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Catherine E. Ford, Pius M. Tih, Thomas Welty, Didier K. Ekouevi, Jennifer Winston, Suzanne Maman, Jeffrey S. A. Stringer, Carla J. Chibwesha, Elizabeth M. Stringer, Benjamin Hanpin Chi, David Coetzee, Bordeaux population health (BPH), and Université de Bordeaux (UB)-Institut de Santé Publique, d'Épidémiologie et de Développement (ISPED)-Institut National de la Santé et de la Recherche Médicale (INSERM)
- Subjects
Adult ,medicine.medical_specialty ,Adolescent ,Anti-HIV Agents ,Epidemiology ,Decision Making ,Psychological intervention ,Mothers ,HIV Infections ,Logistic regression ,Choice Behavior ,Article ,IDLIC ,03 medical and health sciences ,Health services ,0302 clinical medicine ,Secondary analysis ,Environmental health ,Health care ,Humans ,Medicine ,030212 general & internal medicine ,030219 obstetrics & reproductive medicine ,business.industry ,Public health ,Public Health, Environmental and Occupational Health ,Gender Identity ,Obstetrics and Gynecology ,Prevention of mother to child transmission ,Odds ratio ,Patient Acceptance of Health Care ,Infectious Disease Transmission, Vertical ,3. Good health ,Pediatrics, Perinatology and Child Health ,Female ,[SDV.SPEE]Life Sciences [q-bio]/Santé publique et épidémiologie ,business - Abstract
Objectives We investigated whether a woman's role in household decision-making was associated with receipt of services to prevent mother-to-child HIV transmission (PMTCT). Methods We conducted a secondary analysis of the PEARL study, an evaluation of PMTCT effectiveness in Cameroon, Cote d'Ivoire, South Africa, and Zambia. Our exposure of interest was the women's role (active vs. not active) in decision-making about her healthcare, large household purchases, children's schooling, and children's healthcare (i.e., four domains). Our primary outcomes were self-reported engagement at three steps in PMTCT: maternal antiretroviral use, infant antiretroviral prophylaxis, and infant HIV testing. Associations found to be significant in univariable logistic regression were included in separate multivariable models. Results From 2008 to 2009, 613 HIV-infected women were surveyed and provided information about their decision-making roles. Of these, 272 (44.4%) women reported antiretroviral use; 281 (45.9%) reported infant antiretroviral prophylaxis; and 194 (31.7%) reported infant HIV testing. Women who reported an active role were more likely to utilize infant HIV testing services, across all four measured domains of decision-making (adjusted odds ratios [AORs] 2.00-2.89 all p
- Published
- 2019
35. Highly diverse anaerobe-predominant vaginal microbiota among HIV-infected pregnant women in Zambia
- Author
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Julie A. E. Nelson, Margaret P Kasaro, Bellington Vwalika, Andrea Azcarate-Peril, Marcia M. Hobbs, Jeffrey S. A. Stringer, Fei Zou, Elizabeth M. Stringer, Joan T. Price, and Katelyn J. Rittenhouse
- Subjects
RNA viruses ,0301 basic medicine ,Maternal Health ,medicine.medical_treatment ,HIV Infections ,Atopobium vaginae ,Pathology and Laboratory Medicine ,medicine.disease_cause ,Assisted Reproductive Technology ,Cohort Studies ,Immunodeficiency Viruses ,Pregnancy ,Antiretroviral Therapy, Highly Active ,Medicine and Health Sciences ,Gardnerella vaginalis ,Public and Occupational Health ,Young adult ,Phylogeny ,Multidisciplinary ,Ecology ,biology ,Obstetrics ,Microbiota ,Obstetrics and Gynecology ,virus diseases ,Genomics ,Biodiversity ,Vaccination and Immunization ,3. Good health ,Medical Microbiology ,Viral Pathogens ,Viruses ,Vagina ,Medicine ,Female ,Pathogens ,Research Article ,Cohort study ,Adult ,medicine.medical_specialty ,Ecological Metrics ,Science ,Immunology ,030106 microbiology ,Antiretroviral Therapy ,Zambia ,Microbial Genomics ,Preterm Birth ,Microbiology ,Bacteria, Anaerobic ,Young Adult ,03 medical and health sciences ,Antiviral Therapy ,Retroviruses ,Genetics ,medicine ,Humans ,Microbiome ,Microbial Pathogens ,Assisted reproductive technology ,Bacteria ,business.industry ,Lentivirus ,Gut Bacteria ,Ecology and Environmental Sciences ,Organisms ,Biology and Life Sciences ,HIV ,Species Diversity ,medicine.disease ,biology.organism_classification ,Pregnancy Complications ,Lactobacillus ,030104 developmental biology ,Birth ,Women's Health ,Preventive Medicine ,business ,Serostatus ,human activities - Abstract
Vaginal dysbiosis has been shown to increase the risk of some adverse birth outcomes. HIV infection may be associated with shifts in the vaginal microbiome. We characterized microbial communities in vaginal swabs collected between 16–20 gestational weeks in the Zambian Preterm Birth Prevention Study to investigate whether HIV and its treatment alter the microbiome in pregnancy. We quantified relative abundance and diversity of bacterial taxa by whole-genome shotgun sequencing and identified community state types (CST) by hierarchical clustering. Associations between exposures—HIV serostatus (HIV+ vs HIV-) and preconceptional ART (ART+ vs ART-)—and microbiome characteristics were tested with rank-sum, and by linear and logistic regression, accounting for sampling by inverse-probability weighting. Of 261 vaginal swabs, 256 (98%) had evaluable sequences; 98 (38%) were from HIV+ participants, 55 (56%) of whom had preconceptional ART exposure. Major CSTs were dominated by: L. crispatus (CST 1; 17%), L.] iners (CST 3; 32%), Gardnerella vaginalis (CST 4-I; 37%), G. vaginalis & Atopobium vaginae (CST 4-II; 5%), and other mixed anaerobes (CST 4-III; 9%). G. vaginalis was present in 95%; mean relative abundance was higher in HIV+ (0.46±0.29) compared to HIV- participants (0.35±0.33; rank-sum p = .01). Shannon diversity was higher in HIV+/ART+ (coeff 0.17; 95%CI (0.01,0.33), p = .04) and HIV+/ART- (coeff 0.37; 95%CI (0.19,0.55), p < .001) participants compared to HIV-. Anaerobe-dominant CSTs were more prevalent in HIV+/ART+ (63%, AOR 3.11; 95%CI: 1.48,6.55, p = .003) and HIV+/ART- (85%, AOR 7.59; 95%CI (2.80,20.6), p < .001) compared to HIV- (45%). Restricting the comparison to 111 women in either CST 3 (L. iners dominance) or CST 1 (L. crispatus dominance), CST 3 frequency was similar in HIV- (63%) and HIV+/ART- participants (67%, AOR 1.31; 95%CI: (0.25,6.90), p = .7), but higher in HIV+/ART+ (89%, AOR 6.44; 95%CI: (1.12,37.0), p = .04). Pregnant women in Zambia, particularly those with HIV, had diverse anaerobe-dominant vaginal microbiota.
- Published
- 2019
36. 945 Fetal biometry using hadlock versus INTERGROWTH-21st in an urban zambian population
- Author
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Elizabeth M. Stringer, Bellington Vwalika, Joan T. Price, Anne West Honart, Emily Reichert, Mwansa Ketty Lubeya, Andrew Kumwenda, Jeffrey S. A. Stringer, and Ashley Appiagyei
- Subjects
medicine.medical_specialty ,education.field_of_study ,Fetal biometry ,Obstetrics ,business.industry ,Population ,medicine ,Obstetrics and Gynecology ,Intergrowth 21st ,education ,business - Published
- 2021
37. 61 Maternal mid-upper arm circumference is associated with small for gestational age in a Zambian cohort
- Author
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Andrew Kumwenda, Bellington Vwalika, Elizabeth M. Stringer, Chileshe Mabula, Anne West Honart, Katelyn J. Rittenhouse, Joan T. Price, Margaret P Kasaro, Jeffrey S. A. Stringer, and Ashley Appiagyei
- Subjects
medicine.medical_specialty ,business.industry ,Obstetrics ,Mid upper arm circumference ,Cohort ,Obstetrics and Gynecology ,Medicine ,Small for gestational age ,business ,medicine.disease - Published
- 2021
38. Association of previous severe low birth weight with adverse perinatal outcomes in a subsequent pregnancy among HIV-prevalent urban African women
- Author
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Bellington Vwalika, Jeffrey S. A. Stringer, Marie C D Stoner, Elizabeth M. Stringer, Marcela C. Smid, and Yusuf Ahmed
- Subjects
Adult ,medicine.medical_specialty ,Pediatrics ,Birth weight ,Population ,Zambia ,HIV Infections ,Article ,Tertiary Care Centers ,Young Adult ,03 medical and health sciences ,0302 clinical medicine ,Pregnancy ,Recurrence ,Risk Factors ,parasitic diseases ,Odds Ratio ,medicine ,Birth Weight ,Humans ,030212 general & internal medicine ,education ,Perinatal Mortality ,reproductive and urinary physiology ,Retrospective Studies ,education.field_of_study ,030219 obstetrics & reproductive medicine ,Obstetrics ,business.industry ,Infant, Newborn ,Parturition ,Obstetrics and Gynecology ,Retrospective cohort study ,General Medicine ,Odds ratio ,Infant, Low Birth Weight ,Stillbirth ,medicine.disease ,Confidence interval ,Low birth weight ,Logistic Models ,Multivariate Analysis ,Female ,medicine.symptom ,business ,Cohort study - Abstract
Objective To evaluate the association between severity of prior low birth weight (LBW) delivery and adverse perinatal outcomes in the subsequent delivery among an HIV-prevalent urban African population. Methods A retrospective cohort study was conducted among 41 109 women who had undergone two deliveries in Lusaka, Zambia, between February 1, 2006, and May 31, 2013. The relationship between prior LBW delivery (
- Published
- 2016
39. Non-reassuring fetal status: Case definition & guidelines for data collection, analysis, and presentation of immunization safety data
- Author
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Tresor Bodjick Muena Mujobu, Courtney Gravett, Michael G. Gravett, Sonali Kochhar, Olga Lyabis, Elizabeth M. Stringer, Geeta K. Swamy, Donald J. Dudley, and Linda O. Eckert
- Subjects
Adverse event ,medicine.medical_specialty ,Case definition ,Guidelines as Topic ,Guidelines ,Article ,Fetal Distress ,03 medical and health sciences ,0302 clinical medicine ,Immunology and Microbiology(all) ,medicine ,Fetal distress ,Adverse Drug Reaction Reporting Systems ,Humans ,030212 general & internal medicine ,Adverse effect ,Fetus ,Vaccines ,030219 obstetrics & reproductive medicine ,Data collection ,General Veterinary ,General Immunology and Microbiology ,business.industry ,Non-reassuring fetal status ,Fetal intolerance to labor ,Data Collection ,Public Health, Environmental and Occupational Health ,medicine.disease ,veterinary(all) ,Infectious Diseases ,Immunization ,Emergency medicine ,Molecular Medicine ,Female ,Medical emergency ,Presentation (obstetrics) ,business - Published
- 2016
40. Epstein–Barr Virus-Induced Mononucleosis as an Imitator of Severe Preeclampsia
- Author
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Sarah K. Dotters-Katz, Elizabeth M. Stringer, S. Allison Staley, and Marcela C. Smid
- Subjects
mononucleosis ,Mononucleosis ,Case Report ,thrombocytopenia ,medicine.disease_cause ,lcsh:Gynecology and obstetrics ,Preeclampsia ,preeclampsia ,03 medical and health sciences ,0302 clinical medicine ,hemic and lymphatic diseases ,medicine ,030212 general & internal medicine ,lcsh:RG1-991 ,Pregnancy ,030219 obstetrics & reproductive medicine ,Proteinuria ,business.industry ,preterm birth ,Obstetrics and Gynecology ,medicine.disease ,Epstein–Barr virus ,maternal ,Pediatrics, Perinatology and Child Health ,Immunology ,Transaminitis ,Gestation ,medicine.symptom ,Differential diagnosis ,business - Abstract
Background In pregnancy, conditions presenting with hematologic abnormalities, transaminitis, and proteinuria pose diagnostic challenges in pregnancy. Case We present the case of an 18-year-old woman, G1P0, at 33 weeks' gestation with fever of unknown cause, who developed progressively elevated liver enzymes, proteinuria, and thrombocytopenia, due to Epstein–Barr virus (EBV) infection. Conclusion Acute infection with EBV should be included in the differential diagnosis of preeclampsia with severe features, particularly in the setting of fever. Supportive treatment and observation may prevent iatrogenic preterm birth.
- Published
- 2017
41. Minimizing the Risk of Perinatal Human Immunodeficiency Virus Transmission
- Author
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Sarah K. Dotters-Katz, Elizabeth M. Stringer, Matthew Givens, Lisa Rahangdale, and Jeffrey A. Kuller
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Perinatal transmission ,medicine.medical_specialty ,Anti-HIV Agents ,Human immunodeficiency virus (HIV) ,Directive Counseling ,Human immunodeficiency virus transmission ,HIV Infections ,Prenatal care ,medicine.disease_cause ,Adult women ,03 medical and health sciences ,0302 clinical medicine ,Patient Education as Topic ,Pregnancy ,Risk Factors ,Antiretroviral Therapy, Highly Active ,Peripartum Period ,Medicine ,Humans ,030212 general & internal medicine ,030219 obstetrics & reproductive medicine ,business.industry ,Obstetrics ,Obstetrics and Gynecology ,HIV ,Prenatal Care ,General Medicine ,medicine.disease ,Infectious Disease Transmission, Vertical ,Perinatal Care ,Female ,business - Abstract
There are approximately 284,500 adolescent and adult women living with human immunodeficiency virus (HIV) in the United States. It is estimated that approximately 8500 of these women give birth annually. While the rate of perinatal transmission in the United States has decreased by more than 90% since the early 1990s, potentially preventable HIV transmission events still occur and cause significant morbidity and mortality.The aim of this review was to summarize the current data regarding perinatal HIV transmission timing and risk factors, current management recommendations, and implications of timing of transmission on patient management.Literature review.This review reiterates that the risk of perinatal HIV transmission can be reduced to very low levels by following current recommendations for screening for HIV in all pregnant women and properly treating HIV-infected mothers, as well as using evidence-based labor management practices.Familiarity with the pathogenesis of HIV transmission is important for obstetric care providers to appropriately manage HIV-infected women in pregnancy, intrapartum, and the postpartum period.
- Published
- 2018
42. Measured fetal and neonatal exposure to Lumacaftor and Ivacaftor during pregnancy and while breastfeeding
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Aaron T. Trimble, Mary J. Terrell, Charles R. Esther, Cameron J. McKinzie, and Elizabeth M. Stringer
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Pulmonary and Respiratory Medicine ,Adult ,Pediatrics ,medicine.medical_specialty ,Cystic Fibrosis ,Breastfeeding ,Aminopyridines ,Cystic Fibrosis Transmembrane Conductance Regulator ,Breast milk ,Quinolones ,Aminophenols ,Cystic fibrosis ,Article ,Ivacaftor ,03 medical and health sciences ,chemistry.chemical_compound ,0302 clinical medicine ,Liver Function Tests ,Pregnancy ,medicine ,Humans ,030212 general & internal medicine ,Benzodioxoles ,Chloride Channel Agonists ,Fetus ,Milk, Human ,business.industry ,Lumacaftor ,Infant, Newborn ,medicine.disease ,Fetal Blood ,Pregnancy Complications ,Drug Combinations ,Breast Feeding ,Treatment Outcome ,030228 respiratory system ,chemistry ,Cord blood ,Prenatal Exposure Delayed Effects ,Pediatrics, Perinatology and Child Health ,Female ,Drug Monitoring ,business ,medicine.drug - Abstract
With the growing class of CFTR modulator therapy available to more patients and with increasing pregnancies in individuals with CF, there is a growing need to understand the effects of these agents during pregnancy. There are few reports of their continued use in the literature, although it is likely that this is not an uncommon occurrence. We report the uncomplicated and successful pregnancy of a woman treated with lumacaftor/ivacaftor, as well as the clinical course of the infant during the first 9 months of life. We also report drug levels in plasma from the mother, cord blood, breast milk, and infant to estimate fetal and infant drug exposure.
- Published
- 2018
43. HIV serostatus, viral load, and midtrimester cervical length in a Zambian prenatal cohort
- Author
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Mwansa Ketty Lubeya, Joan T. Price, Andrew Kumwenda, Elizabeth M. Stringer, Margaret P Kasaro, Bellington Vwalika, Katelyn J. Rittenhouse, Jennifer Winston, and Jeffrey S. A. Stringer
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Adult ,medicine.medical_specialty ,Human immunodeficiency virus (HIV) ,Zambia ,Gestational Age ,HIV Infections ,medicine.disease_cause ,Logistic regression ,Article ,03 medical and health sciences ,Young Adult ,0302 clinical medicine ,Pregnancy ,Linear regression ,medicine ,Humans ,Mass Screening ,030212 general & internal medicine ,Prospective Studies ,Prospective cohort study ,030219 obstetrics & reproductive medicine ,Obstetrics ,business.industry ,Obstetrics and Gynecology ,Gestational age ,General Medicine ,Viral Load ,Cervical Length Measurement ,Pregnancy Trimester, Second ,Cohort ,Linear Models ,Female ,Serostatus ,business ,Viral load - Abstract
Objective To evaluate whether maternal HIV serostatus and plasma viral load (VL) are associated with midtrimester cervical length (CL). Methods The Zambian Preterm Birth Prevention Study (ZAPPS) is an ongoing prospective cohort that began enrolling in Lusaka in August 2015. Pregnant women undergo ultrasound to determine gestational age and return for CL measurement at 16-28 weeks. We evaluated crude and adjusted associations between dichotomous indicators and short cervix (≤2.5 cm) via logistic regression, and between VL and CL as a continuous variable via linear regression. Results This analysis includes 1171 women enrolled between August 2015 and September 2017. Of 294 (25.1%) HIV-positive women, 275 (93.5%) had viral load performed close to CL measurement; of these, 148 (53.8%) had undetectable virus. Median CL was 3.6 cm (IQR 3.5-4.0) and was similar in HIV-infected (3.7 cm, IQR 3.5-4.0) versus uninfected (3.6 cm, IQR 3.5-4.0) participants (P=0.273). The odds of short CL were similar by HIV serostatus (OR 0.64; P=0.298) and detectable VL among those infected (OR 2.37, P=0.323). We observed no association between log VL and CL via linear regression (-0.12 cm; P=0.732). Conclusion We found no evidence of association between HIV infection and short CL.
- Published
- 2018
44. Risk of stillbirth among Zambian women with a prior cesarean delivery
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Marie C D Stoner, Marcela C. Castillo, Elizabeth M. Stringer, Margaret P Kasaro, Benjamin Hanpin Chi, Andrew Kumwenda, Bellington Vwalika, and Jeffrey S. A. Stringer
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Adult ,medicine.medical_specialty ,Perinatal Death ,Zambia ,Gestational Age ,Article ,03 medical and health sciences ,symbols.namesake ,Young Adult ,0302 clinical medicine ,Pregnancy ,Risk Factors ,Medicine ,Humans ,030212 general & internal medicine ,Poisson regression ,Risk factor ,reproductive and urinary physiology ,Retrospective Studies ,030219 obstetrics & reproductive medicine ,business.industry ,Obstetrics ,Cesarean Section ,Confounding ,Infant, Newborn ,Obstetrics and Gynecology ,Retrospective cohort study ,General Medicine ,Stillbirth ,medicine.disease ,Confidence interval ,female genital diseases and pregnancy complications ,Relative risk ,Cohort ,symbols ,population characteristics ,Female ,business - Abstract
OBJECTIVE Cesarean delivery (CD) may be associated with stillbirth in future pregnancies. We investigated prior CD as a risk factor for stillbirth in Lusaka, Zambia. METHODS We conducted a retrospective cohort analysis of women with only one prior pregnancy who delivered between February 1, 2006, and May 31, 2013. We analysed data from the Zambia Electronic Perinatal System. Maternal and infant characteristics were analyzed for association with stillbirth using Pearson's χ2 test or the Wilcoxon rank-sum test. We calculated risk ratios for the relationship between stillbirth (antepartum vs intrapartum) and prior CD, with a log Poisson model to adjust for confounding. RESULTS Of 57 320 women in our cohort, 1933 (3.4%) reported a prior CD. There were 1012 (1.8%) stillbirths in the no prior CD group and 81 (4.2%) in the prior CD group (P
- Published
- 2018
45. Pregnancy outcomes among HIV-infected women who conceived on antiretroviral therapy
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Karin Nielsen-Saines, Xingye Wu, Michelle A. Kendall, Elizabeth M. Stringer, Judith S. Currier, Susan Cu-Uvin, Thomas B. Campbell, Fred Sawe, Shahin Lockman, and Law, Matthew
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0301 basic medicine ,HPTN 052 ,RNA viruses ,medicine.medical_treatment ,Maternal Health ,HIV Infections ,Reproductive health and childbirth ,Abortion ,Low Birth Weight and Health of the Newborn ,Miscarriage ,Pathology and Laboratory Medicine ,Assisted Reproductive Technology ,0302 clinical medicine ,Immunodeficiency Viruses ,Pregnancy ,Antiretroviral Therapy, Highly Active ,Infant Mortality ,Medicine and Health Sciences ,Public and Occupational Health ,030212 general & internal medicine ,Termination of Pregnancy ,Pregnancy Complications, Infectious ,Pediatric ,Multidisciplinary ,Ectopic pregnancy ,Obstetrics ,Infectious ,Pregnancy Outcome ,Obstetrics and Gynecology ,Stillbirth ,Vaccination and Immunization ,Infectious Diseases ,Mental Health ,Medical Microbiology ,Viral Pathogens ,Viruses ,Gestation ,Premature Birth ,Medicine ,Female ,Pathogens ,Live birth ,Stillbirths ,Research Article ,Adult ,medicine.medical_specialty ,General Science & Technology ,Anti-HIV Agents ,Science ,Immunology ,Antiretroviral Therapy ,Preterm Birth ,Microbiology ,03 medical and health sciences ,Antiviral Therapy ,Clinical Research ,Preterm ,Retroviruses ,medicine ,Humans ,Highly Active ,Conditions Affecting the Embryonic and Fetal Periods ,Microbial Pathogens ,Proportional Hazards Models ,Assisted reproductive technology ,business.industry ,Contraception/Reproduction ,Lentivirus ,Organisms ,Biology and Life Sciences ,HIV ,Perinatal Period - Conditions Originating in Perinatal Period ,medicine.disease ,030112 virology ,United States ,Pregnancy Complications ,Birth ,Women's Health ,Preventive Medicine ,business - Abstract
As antiretroviral therapy (ART) expands in resource-limited settings, understanding the impact of ART on pregnancy outcomes is critical. We analyzed women who became pregnant on ART while enrolled in a clinical trial (HPTN 052, ACTG A5208, and ACTG A5175); the majority of women were from Africa, with a median age of 29 years. Eligible women were on ART at conception and had a documented date of a last menstrual period and a pregnancy outcome. The primary outcome was non-live birth (stillbirth; spontaneous abortion; elective termination; or ectopic pregnancy) versus live birth. Preterm birth (
- Published
- 2018
46. Buprenorphine and Naloxone Compared With Methadone Treatment in Pregnancy
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Samantha Wiegand, Carl Seashore, John M. Thorp, Hendrée E. Jones, Elizabeth M. Stringer, and Alison M. Stuebe
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Adult ,Narcotics ,medicine.medical_specialty ,Neonatal intensive care unit ,Narcotic Antagonists ,Birth weight ,Young Adult ,Pregnancy ,Naloxone ,Opiate Substitution Treatment ,Humans ,Medicine ,Retrospective Studies ,business.industry ,Obstetrics ,Infant, Newborn ,Obstetrics and Gynecology ,Retrospective cohort study ,Opioid-Related Disorders ,medicine.disease ,Buprenorphine ,Pregnancy Complications ,Anesthesia ,Morphine ,Female ,business ,Neonatal Abstinence Syndrome ,Methadone ,medicine.drug - Abstract
OBJECTIVE: To compare neonatal abstinence syndrome prevalence and characteristics among neonates born to women prescribed buprenorphine and naloxone compared with methadone during pregnancy. METHODS: Retrospective cohort analysis of mother– neonate dyads treated with either buprenorphine and naloxone or methadone during pregnancy. Primary neonatal outcomes included diagnosis of neonatal abstinence syndrome, neonatal abstinence syndrome peak scores, total amount of morphine used to treat neonatal abstinence syndrome (mg), and duration of treatment for neonatal abstinence syndrome (days). Secondary outcomes included head circumference, birth weight, length, preterm birth, neonatal intensive care unit admission, Apgar scores, and overall length of hospitalization. RESULTS: From January 1, 2011, to November 30, 2013, we identified 62 mother–neonate dyads, 31 treated with methadone and 31 treated with buprenorphine and naloxone. Sixteen neonates (51.6%) in the methadone group were diagnosed with neonatal abstinence syndrome compared with eight (25.1%) in the buprenorphine and naloxone group (adjusted odds ratio 2.55, 95% confidence interval [CI] 1.31–4.98, P5.01). The buprenorphine and naloxone-exposed neonates had lower peak neonatal abstinence syndrome scores (9.064.4 compared with 10.763.7, multivariate-adjusted mean difference522.77, 95% CI 24.99 to 20.56, P5.02) and shorter overall hospitalization (5.665.0 compared with 9.867.4 days, multivariate-adjusted mean difference523.90, 95% CI, 27.13 to 20.67, P5.02). We found no other differences in primary or secondary outcomes. CONCLUSION: In a cohort of pregnant patients treated with either methadone or buprenorphine and naloxone in pregnancy, newborns exposed to maternal buprenorphine and naloxone had less frequent neonatal abstinence syndrome. Additionally, neonates exposed to buprenorphine and naloxone had shorter overall hospitalization lengths.
- Published
- 2015
47. Temporal Trends and Predictors of Modern Contraceptive Use in Lusaka, Zambia, 2004–2011
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Benjamin H. Chi, Nancy L. Hancock, Marie C D Stoner, Jeffrey S. A. Stringer, Sujit D Rathod, Carla J. Chibwesha, Margaret P Kasaro, Elizabeth M. Stringer, and Bellington Vwalika
- Subjects
Adult ,Pediatrics ,medicine.medical_specialty ,Adolescent ,Article Subject ,Cross-sectional study ,Population ,Alternative medicine ,lcsh:Medicine ,Zambia ,Developing country ,General Biochemistry, Genetics and Molecular Biology ,Patient Education as Topic ,5. Gender equality ,medicine ,Humans ,education ,Reproductive health ,education.field_of_study ,General Immunology and Microbiology ,business.industry ,lcsh:R ,Social change ,General Medicine ,Middle Aged ,3. Good health ,Contraception ,Family planning ,Pill ,Female ,business ,Research Article ,Demography - Abstract
Introduction. Although increasing access to family planning has been an important part of the global development agenda, millions of women continue to face unmet need for contraception.Materials and Methods. We analyzed data from a repeated cross-sectional community survey conducted in Lusaka, Zambia, over an eight-year period. We described prevalence of modern contraceptive use, including long-acting reversible contraception (LARC), among female heads of household aged 16–50 years. We also identified predictors of LARC versus short-term contraceptive use among women using modern methods.Results and Discussion. Twelve survey rounds were completed between November 2004 and September 2011. Among 29,476 eligible respondents, 17,605 (60%) reported using modern contraception. Oral contraceptive pills remained the most popular method over time, but use of LARC increased significantly, from less than 1% in 2004 to 9% by 2011 (p<0.001). Younger women (OR: 0.46, 95% CI: 0.34, 0.61) and women with lower levels of education (OR: 0.70, 95% CI: 0.56, 0.89) were less likely to report LARC use compared to women using short-term modern methods.Conclusions. Population-based assessments of contraceptive use over time can guide programs and policies. To achieve reproductive health equity and reduce unmet contraceptive need, future efforts to increase LARC use should focus on young women and those with less education.
- Published
- 2015
48. USE OF COMPOSITE MATERIALS AS A COMPONENT OF TUSK FRACTURE MANAGEMENT IN AN ASIAN ELEPHANT (ELEPHAS MAXIMUS) AND AN AFRICAN ELEPHANT (LOXODONTA AFRICANA)
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Selvum Pillay, Pat Flora, Stephanie McCain, Benjamin Willis, Jon Hall, Elizabeth M. Stringer, Richard R. Sim, Rachael Chappell, and Dennis Donovan
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0301 basic medicine ,Endodontic therapy ,Male ,040301 veterinary sciences ,Elephants ,Sulfadiazine ,Trimethoprim ,0403 veterinary science ,African elephant ,03 medical and health sciences ,Tooth Fractures ,Elephas ,Asian elephant ,biology.animal ,Tusk ,medicine ,Animals ,Pulpitis ,Composite material ,Dental Pulp ,General Veterinary ,biology ,business.industry ,Chlorhexidine ,04 agricultural and veterinary sciences ,General Medicine ,030108 mycology & parasitology ,medicine.disease ,biology.organism_classification ,Anti-Bacterial Agents ,Drug Combinations ,Resins, Synthetic ,visual_art ,visual_art.visual_art_medium ,Pulp (tooth) ,Animal Science and Zoology ,Animals, Zoo ,business - Abstract
Tusk fractures in Asian (Elephas maximus) and African elephants (Loxodonta africana) can result in damage to the distal end or to longitudinal cracks, potentially progressing to pulpitis. With pulp exposure, endodontic therapy is the treatment of choice, but conservative therapy has sufficed for some elephants. This manuscript describes the use of composite materials as a component of tusk fracture management. A 7-yr-old male Asian elephant fractured the distal end of both tusks with pulp exposure in one. Capping of each tusk with a Kevlar/fiberglass composite prevented further damage, and a modification allowed care of the exposed pulp tissue. A 34-yr-old male African elephant with a longitudinal crack received a carbon fiber/fiberglass composite circumferential wrap to potentially stabilize the crack. Compression of the crack was achieved, but follow-up was truncated due to bacterial pulpitis. Both cases show that composite material allows for lightweight, durable management of tusk fractures with continued radiographic monitoring.
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- 2017
49. In Reply
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Elizabeth M. Stringer, Catherine J. Vladutiu, Priya Batra, Jeffrey S. A. Stringer, and M. Kathryn Menard
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Obstetrics and Gynecology - Published
- 2017
50. Universal combination antiretroviral regimens to prevent mother-to-child transmission of HIV in rural Zambia: a two-round cross-sectional study
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Elizabeth M. Stringer, Patrick Musonda, Namwinga Chintu, Matthew G. Gartland, Eleanor R. Turnbull, Saziso N. Mulenga, Mwila K. Lembalemba, Benjamin H. Chi, Jeffrey S. A. Stringer, and Maximillian Bweupe
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Male ,Rural Population ,Anti-HIV Agents ,Research ,Infant, Newborn ,Public Health, Environmental and Occupational Health ,virus diseases ,Zambia ,HIV Infections ,Pilot Projects ,Infectious Disease Transmission, Vertical ,Survival Rate ,Breast Feeding ,Cross-Sectional Studies ,immune system diseases ,Pregnancy ,Humans ,Drug Therapy, Combination ,Female ,sense organs ,Pregnancy Complications, Infectious ,Program Evaluation - Abstract
To evaluate if a pilot programme to prevent mother-to-child transmission (PMTCT) of the human immunodeficiency virus (HIV) was associated with changes in early childhood survival at the population level in rural Zambia.Combination antiretroviral regimens were offered to pregnant and breastfeeding, HIV-infected women, irrespective of immunological status, at four rural health facilities. Twenty-four-month HIV-free survival among children born to HIV-infected mothers was determined before and after PMTCT programme implementation using community surveys. Households were randomly selected and women who had given birth in the previous 24 months were asked to participate. Mothers were tested for HIV antibodies and children born to HIV-infected mothers were tested for viral deoxyribonucleic acid. Multivariable models were used to determine factors associated with child HIV infection or death.In the first survey (2008-2009), 335 of 1778 women (18.8%) tested positive for HIV. In the second (2011), 390 of 2386 (16.3%) tested positive. The 24-month HIV-free survival in HIV-exposed children was 0.66 (95% confidence interval, CI: 0.63-0.76) in the first survey and 0.89 (95% CI: 0.83-0.94) in the second. Combination antiretroviral regimen use was associated with a lower risk of HIV infection or death in children (adjusted hazard ratio: 0.33, 95% CI: 0.15-0.73). Maternal knowledge of HIV status, use of HIV tests and use of combination regimens during pregnancy increased between the surveys.The PMTCT programme was associated with an increased HIV-free survival in children born to HIV-infected mothers. Maternal utilization of HIV testing and treatment in the community also increased.Évaluer si un programme pilote pour prévenir la transmission mère-enfant (PTME) du virus de l'immunodéficience humaine (VIH) est associé à des changements en matière de survie du jeune enfant au sein de la population dans les régions rurales de la Zambie.Des thérapies antirétrovirales combinées ont été proposées à des femmes infectées par le VIH, enceintes et allaitantes, indépendamment de leur statut immunologique, dans quatre centres de santé ruraux. La survie sans VIH à 24 mois chez les enfants nés de mères infectées par le VIH a été déterminée avant et après la mise en œuvre du programme PTME à l'aide d'enquêtes communautaires. Les ménages ont été choisis de manière aléatoire, et il a été demandé aux femmes qui avaient accouché au cours des 24 derniers mois, d'y participer. On a testé la présence d'anticorps anti-VIH chez les mères et d'acide désoxyribonucléique viral chez les enfants nés de mères infectées par le VIH. Des modèles à variables multiples ont été utilisés pour déterminer les facteurs associés à l'infection par le VIH ou au décès de l'enfant.Dans la première étude (2008–2009), 335 femmes parmi 1778 (18,8%) ont été testées positives à l'infection par le VIH. Dans la deuxième étude (2011), 390 femmes parmi 2386 (16,3%) ont été testées positives. La survie sans VIH à 24 mois chez les enfants exposés au VIH était de 0,66 (intervalle de confiance de 95%, IC: 0,63–0,76) dans la première étude et de 0,89 (IC de 95%: 0,83–0,94) dans la seconde. La combinaison de la thérapie antirétrovirale était associée à un risque inférieur d'infection par le VIH ou de décès chez les enfants (rapport de risques ajusté: 0,33, IC de 95%: 0,15–0,73). La connaissance du statut VIH des mères, l'utilisation des tests de dépistage du VIH et des traitements combinés pendant la grossesse ont augmenté entre les études.Le programme PTME était associé à une augmentation de la survie sans VIH chez les enfants nés de mères infectées par le VIH. L'utilisation par les mères du dépistage et du traitement contre le VIH a également augmenté au sein de la communauté.Evaluar si un programa piloto para prevenir la transmisión maternoinfantil (PTMI) del virus de la inmunodeficiencia humana (VIH) está asociado a cambios en la supervivencia en la primera infancia a nivel de población en las zonas rurales de Zambia.Se ofreció una combinación de tratamientos antirretrovirales a mujeres embarazadas y lactantes infectadas por el VIH, independientemente de su estado inmunológico, en cuatro centros de salud rurales. Mediante encuestas en la comunidad se determinó una supervivencia sin VIH de veinticuatro meses entre los niños nacidos de madres infectadas por el VIH antes y después de la implementación del programa PTMI. Los hogares se seleccionaron al azar y se pidió que participaran las mujeres que habían dado a luz en los 24 meses anteriores. Las madres se sometieron a una prueba para detectar los anticuerpos contra el VIH y se realizó una prueba del ácido desoxirribonucleico viral a los niños nacidos de madres infectadas con VIH. Se utilizaron modelos multivariables para determinar los factores asociados con la infección o muerte por VIH del niño.En la primera encuesta (2008–2009), 335 de 1778 mujeres (18,8 %) dieron positivo en el VIH. En la segunda (2011), dieron positivo 390 de 2386 (16,3 %). La supervivencia sin VIH de 24 meses en los niños expuestos al VIH fue del 0,66 (intervalo de confianza del 95 %, IC: 0,63–0,76) en la primera encuesta y del 0,89 (IC del 95 %: 0,83–0,94) en la segunda. La combinación de un tratamiento antirretroviral se asoció con un menor riesgo de infección por VIH o muerte en los niños (razón de riesgo ajustada: 0,33, IC del 95 %: 0,15–0,73). El conocimiento de las madres de su estado serológico, el uso de pruebas para el VIH y los tratamientos combinados durante el embarazo aumentaron en el tiempo transcurrido entre las encuestas.El programa PTMI estuvo asociado a un aumento de la supervivencia sin VIH en los niños nacidos de madres infectadas por el VIH. La utilización materna de la prueba y el tratamiento del VIH en la comunidad también aumentó.تقييم ما إذا كان البرنامج التجريبي لتوقي انتقال فيروس العوز المناعي البشري من الأم إلى الطفل مرتبطاً بالتغيرات في البقاء على قيد الحياة في مرحلة الطفولة المبكرة على صعيد السكان في المناطق الريفية في زامبيا.تم تقديم نظم العلاج التوليفي بمضادات الفيروسات القهقرية إلى النساء الحوامل والمرضعات المصابات بعدوى فيروس العوز المناعي البشري، بغض النظر عن حالتهن المناعية، في أربعة مرافق صحية ريفية. وتم تحديد بقاء الأطفال في سن 24 شهراً على قيد الحياة دون الإصابة بفيروس العوز المناعي البشري بين الأطفال الذين ولدوا لأمهات مصابات بعدوى فيروس العوز المناعي البشري قبل تنفيذ برنامج توقي الانتقال من الأم إلى الطفل وبعده باستخدام دراسات استقصائية مجتمعية. وتم اختيار الأسر المعيشية عشوائياً ومطالبة النساء اللاتي ولدن خلال الأربع والعشرين شهراً السابقة بالمشاركة. وتم اختبار الأمهات للكشف عن أضداد فيروس العوز المناعي البشري، وتم اختبار الأطفال الذين ولدوا لأمهات مصابات بفيروس العوز المناعي البشري للكشف عن الحمض الريبي النووي منزوع الأكسجين الفيروسي. وتم استخدام نماذج متعددة المتغيرات لتحديد العوامل المرتبطة بإصابة الطفل بعدوى فيروس العوز المناعي البشري أو وفاته.كانت نتيجة اختبار 335 سيدة من إجمالي 1778 سيدة (18.8 %) في الدراسة الاستقصائية الأولى (من 2008 إلى 2009) إيجابية لفيروس العوز المناعي البشري. وكانت نتيجة اختبار 390 سيدة من إجمالي 2386 سيدة (16.3 %) في الدراسة الاستقصائية الثانية (2011) إيجابية. وكان بقاء الأطفال في سن 24 شهراً على قيد الحياة دون الإصابة بفيروس العوز المناعي البشري في الأطفال المعرضين لفيروس العوز المناعي البشري 0.66 (فاصل الثقة 95 %، فاصل الثقة: 0.63 –0.76) في الدراسة الاستقصائية الأولى و0.89 (فاصل الثقة: 95 %، فاصل الثقة: 0.83 –0.94) في الدراسة الاستقصائية الثانية. وكان استخدام نظام العلاج التوليفي بمضادات الفيروسات القهقرية مرتبطاً بانخفاض مخاطر الإصابة بعدوى فيروس العوز المناعي البشري أو الوفاة في الأطفال (نسبة المخاطر المصححة: 0.33، فاصل الثقة: 95 %، فاصل الثقة: 0.15 –0.73). وازدادت معرفة الأمهات بحالة فيروس العوز المناعي البشري واستخدام اختبارات فيروس العوز المناعي البشري واستخدام نظم العلاج التوليفي أثناء الحمل بين الدراسات الاستقصائية.ارتبط برنامج توقي الانتقال من الأم إلى الطفل بازدياد بقاء الأطفال الذين ولدوا لأمهات مصابات بعدوى فيروس العوز المناعي البشري على قيد الحياة دون الإصابة بفيروس العوز المناعي البشري. وازداد كذلك استخدام الأمهات لاختبارات فيروس العوز المناعي البشري وعلاجه في المجتمع المحلي.评估赞比亚农村防止艾滋病毒(HIV)母婴传播的试点计划(PMTCT)是否在人口水平上与儿童早期存活的改变有关。在四个农村卫生设施,对于处于怀孕和哺乳期并感染艾滋病毒的妇女,无论其免疫状态如何均提供联合抗逆转录病毒治疗方案。使用社区调查确定PMTCT计划实施之前和之后HIV感染母亲生育的孩子中24月无HIV存活情况。随机选择家庭,并要求在之前24个月生育的妇女参与调查。母亲接受HIV抗体检测,HIV感染母亲所生婴儿接受病毒脱氧核糖核酸检测。使用多变量模型确定与儿童HIV感染或死亡相关的因素。在第一次调查中(2008–2009年),1778名妇女中有335名(18.8%)检测HIV阳性。在第二次调查中(2011年),2386名中有390(16.3%)名检测阳性。在第一次调查中HIV暴露儿童中24月无HIV存活率为0.66(95%置信区间,CI:0.63–0.76),在第二次中为0.89(95% CI:0.83–0.94)。使用联合抗逆转录疗法与更低HIV感染或儿童死亡风险相关(校正危险比:0.33,95% CI:0.15–0.73)。在两次调查之间,母亲HIV知识的状态、使用HIV检测和在怀孕期间使用联合治疗方案的情况有所增强。PMTCT计划与HIV感染母亲所生儿童更高的无HIV生存率有关。社区中母亲使用HIV检测和治疗也有增加。Определить, связана ли пилотная программа по предотвращению передачи от матери к ребенку (ППМР) вируса иммунодефицита человека (ВИЧ) с изменениями в уровне выживаемости в раннем детском возрасте в сельских районах Замбии.В четырех сельских медицинских учреждениях беременным и кормящим ВИЧ-инфицированным женщинам предлагалась комбинированная антиретровирусная терапия вне зависимости от их иммунологического статуса. До и после реализации программы ППМР на основе исследований общин были определены уровни 24-месячной выживаемости без ВИЧ среди детей, рожденных от ВИЧ-инфицированных матерей. Домохозяйства выбирались случайным образом, и женщинам, родившим в течение последних 24 месяцев, предлагалось принять участие в исследовании. Матери были протестированы на наличие антител к ВИЧ, а дети, рожденные от ВИЧ-инфицированных матерей, были проверены на наличие ДНК ВИЧ. Для определения факторов, связанных с инфицированием детей ВИЧ или смертью, использовались многопараметрические модели.В первом исследовании (2008–2009 гг.) 335 из 1778 женщин (18,8%) имели положительный результат на ВИЧ. Во втором исследовании (2011 г.) положительный результат показали 390 из 2386 (16,3%) обследованных женщин. Уровень 24-месячной выживаемости без ВИЧ у детей, подверженных ВИЧ, составил 0,66 (95% доверительный интервал, ДИ: 0,63–0,76) в первом исследовании и 0,89 (95% ДИ: 0,83–0,94) – во втором. Применение комбинированной антиретровирусной терапии сопровождалось более низким риском инфицирования ВИЧ или смерти у детей (скорректированное отношение рисков: 0,33, 95% ДИ: 0,15–0,73). Осведомленность матерей о ВИЧ-статусе, использование тестов на ВИЧ и применение комбинированной терапии во время беременности возросло в период между исследованиями.Программа ППМР сопровождалась увеличением выживаемости без ВИЧ у детей, рожденных от ВИЧ-инфицированных матерей. Также увеличилось число матерей в сельских общинах, проходящих проверку и лечение ВИЧ-инфекции.
- Published
- 2014
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