Impact of maternal ART on mother-to-child transmission (MTCT) of HIV at six weeks postpartum in Rwanda

BACKGROUND: In 2010, Rwanda adopted ART for prevention of mother to child transmission of HIV from pregnant women living with HIV during pregnancy and breasfeeding period. This study examines rates of mother-to-childtransmission of HIV at 6–10 weeks postpartum and risk factors for mother-to-child transmission of HIV (MTCT) among HIV infected women on ART during pregnancy and breastfeeding. METHODS: A cross-sectional survey study was conducted between July 2011–June 2012 among HIV-exposed infants aged 6–10 weeks and their mothers/caregivers. Stratified multi-stage, probability proportional to size and systematic sampling to select a national representative sample of clients. Consenting mothers/caregivers were interviewed on demographic and program interventions. Dry blood spots from HIV-exposed infants were collected for HIV testing using DNA PCR technique. Results are weighted for sample realization. Univariable analysis of socio-demographic and programmatic determinants of early mother-to-child transmission of HIV was conducted. Variables were retained for final multivariable models if they were either at least of marginal significance (p-value < 0.10) or played a confounding role (the variable had a noticeable impact > 10% change on the effect estimate). RESULTS: The study sample was 1639 infants with HIV test results. Twenty-six infants were diagnosed HIV-positive translating to a weighted MTCT estimate of 1.58% (95% CI 1.05–2.37%). Coverage of most elimination of MTCT (EMTCT) program interventions, was above 80, and 90.4% of mother-infant pairs received antiretroviral treatment or prophylaxis. Maternal ART and infant antiretroviral prophylaxis (OR 0.01; 95%CI 0.001–0.17) and maternal age older than 25 years were significantly protective (OR 0.33; 95%CI 0.14–0.78). No disclosure of HIV status, not testing for syphilis during pregnancy and preterm birth were significant risk factors for MTCT. Factors suggesting higher sociodemographic status (flush toilet, mother self-employed) were borderline risk factors for MTCT. CONCLUSION: ART for all women during pregnancy and breastfeeding was associated with the estimated low MTCT rate of 1.58%. Mothers who did not receive a full package of anti-retroviral therapy according to the Rwanda EMTCT protocol, and young and single mothers were at higher risk of MTCT and should be targeted for support in preventing HIV infection

Vulnerability of women in an African setting: lessons for mother-to-child HIV transmission prevention programmes

After discussing advantages and risks, only a third of the 290 HIV-infected women included in an intervention study to reduce mother-to-child transmission of HIV in Mombasa, Kenya, informed their partners of their results. Despite careful counselling, 10% subsequently experienced violence or disruption of their relationship. To increase the uptake of interventions to reduce perinatal HIV transmission safely, we recommend the involvement of partners in HIV testing. In addition, the counselling of women has to address methods and skills to deal with violence

Exposure to HIV-1 during delivery and mother-to-child transmission.

Background The correlation between the presence of HIV-1 in maternal cervico-vaginal secretions and in the infant\u27s oro-pharyngal secretions at birth, and mother-to-child HIV transmission (MTCT) were examined to obtain a better understanding of its mechanism. Methods Women without medical and obstetrical complications, living within a reasonable distance of the government hospital in Mombasa, Kenya, were recruited after informed consent. Maternal and infant characteristics were collected. Polymerase chain reaction was used to detect HIV-1 in cervico-vaginal and oro-pharyngal secretions. Infants were tested for HIV-1 by polymerase chain reaction within 48 h and at 6 weeks after delivery. Results Between April 1998 and April 1999, 228 woman–infant pairs were included in the study. HIV-1 DNA in cervico-vaginal secretions was independently associated with HIV-1 maternal viral load and with infant birth-weight, whereas HIV-1 RNA was associated with maternal viral load and maternal age. HIV-1 DNA in the oro-pharyngal secretions was also independently associated with maternal viral load. MTCT rate at the age of 6 weeks was 23.6%. Intrapartum and early postpartum HIV transmission was independently associated with maternal viral load [adjusted odds ratio (OR), 1.6; 95% confidence interval (CI),1.0–2.7], detection of HIV-1 RNA in cervico-vaginal secretions (adjusted OR, 3.2; 95% CI, 1.5–7.3) and of HIV-1 DNA in oro-pharyngal secretions (adjusted OR, 3.2; 95% CI, 1.1–9.0). Discussion As far as is known, this is the first study showing that infant exposure to HIV-1 in the birth canal and the presence of HIV-infected cells in the infant\u27s oro-pharyngal cavity are independently associated with intrapartum and early postpartum MTCT. It supports the hypothesis that MTCT could occur through the oral route

Vaginal lavage with chlorhexidine during labour to reduce mother to child HIV transmission: clinical trial in Mombasa, Kenya.

Objectives To evaluate the effect of vaginal lavage with diluted chlorhexidine on mother-to child transmission of HIV (MTCT) in a breastfeeding population. Methods This prospective clinical trial was conducted in a governmental hospital in Mombasa, Kenya. On alternating weeks, women were allocated to non-intervention or to intervention consisting of vaginal lavage with 120 ml 0.2% chlorhexidine, later increased to 0.4%, repeated every 3 h from admission to delivery. Infants were tested for HIV by DNA polymerase chain reaction within 48 h and at 6 and 14 weeks of life. Results Enrolment and follow-up data were available for 297 and 309 HIV-positive women, respectively, in the non-lavage and the lavage groups. There was no evidence of a difference in intrapartum MTCT (17.2 versus 15.9%, OR 0.9, 95% CI 0.6–1.4) between the groups. Lavage solely before rupture of the membranes tended towards lower MTCT with chlorhexidine 0.2% (OR O.6, 95% CI 0.3–1.1), and even more with chlorhexidine 0.4% (OR 0.1, 95% CI 0.0–0.9). Conclusion The need remains for interventions reducing MTCT without HIV testing, often unavailable in countries with a high prevalence of HIV. Vaginal lavage with diluted chlorhexidine during delivery did not show a global effect on MTCT in our study. However, the data suggest that lavage before the membranes are ruptured might be associated with a reduction of MTCT, especially with higher concentrations of chlorhexidine

Placental inflammation and perinatal transmission of HIV-1

The effect of placental membrane inflammation oil mother-to-child transmission (MTCT) of HIV-1 is reported. Placentas from HIV-1-infected women were examined as part of a perinatal HIV-1 project in Mombasa, Kenya. Polymerase chain reaction analysis was used to test for HIV-1 in the infants at birth and at 6 weeks. The maternal HIV-1 seroprevalence as 13.3% (298 of 2.235). The overall rate of MTCT of HIV-1 was 25.4%: polymerase chain reaction analysis revealed that of the 201 infants 6.0% (12) were already, HIV-1-positive at birth (intrauterine transmission) and 19.4% (39) were infected during the peripartum period or in early neonatal life (perinatal transmission). The prevalence of acute chorioamnionitis was 8.8%, that of deciduitis vas 10.8%, and that of villitis vas 1.6%. Acute chorioamnionitis was independently associated with peripartum HIV-1 transmission but not with in utero MTCT (17.9% vs. 6.7%, respectively: adjusted odds ratio, 3.9: 95% confidence interval. 1.2-12.5: p = .025). Other correlates of perinatal MTCT were presence of HIV in the genital tract and in the baby's oral cavity and a high maternal viral load in peripheral blood. The adjusted population attributable fraction of 12.8% (95% confidence interval, 1.5%-22.8%) indicated that approximately 3% of MTCT could be prevented if acute chorioamnionitis A as eliminated, We suggest that further research oil the role of antimicrobial treatment in the prevention of chorioamnionitis and the reduction of peripartum MTCT needs to be performed

Diversity of the Human Immunodeficiency Virus Type 1 (HIV-1) env Sequence after Vertical Transmission in Mother-Child Pairs Infected with HIV-1 Subtype A

Although several virologic and immunologic factors associated with an increased risk of perinatal human immunodeficiency virus type 1 (HIV-1) transmission have been described, the mechanism of mother-to-child transmission is still unclear. More specifically, the question of whether selective pressures influence the transmission remains unanswered. The aim of this study was to assess the genetic diversity of the transmitted virus after in utero transmission and after peripartum transmission and to compare the viral heterogeneity in the child with the viral heterogeneity in the mother. To allow a very accurate characterization of the viral heterogeneity in a single sample, limiting-dilution sequencing of a 1,016-bp fragment of the env gene was performed. Thirteen children were tested, including 6 with in utero infections and 7 with peripartum infections. Samples were taken the day after birth and at the ages of 6 and 14 weeks. A homogeneous virus population was seen in six (46.2%) infants, of whom two were infected in utero and four were infected peripartum. A more heterogeneous virus population was detected in seven infants (53.8%), four infected in utero and three infected peripartum. The phylogenetic trees of the mother-child pairs presented a whole range of different tree topologies and showed infection of the child by one or more maternal variants. In conclusion, after HIV-1 transmission from mother to child a heterogeneous virus population was detected in approximately one-half of the children examined. Heterogeneous virus populations were found after peripartum infection as well as after in utero infection. Phylogenetic tree topologies argue against selection processes as the major mechanism driving mother-to-child transmission but support the hypothesis that virus variability is mainly driven by the inoculum level and/or exposure time

Perspectives of stakeholders regarding the value of maternal and newborn health interventions and practices supported by UNICEF and other partners in the West Nile region of Uganda: a qualitative study

Abstract Introduction Uganda has high maternal, neonatal, and under-five mortality rates. This study documents stakeholder perspectives on best practices in a maternal and newborn health (MNH) quality-improvement programme implemented in the West Nile region of Uganda to improve delivery and utilisation of MNH services. Methods This exploratory cross-sectional qualitative study, conducted at the end of 2021, captured the perspectives of stakeholders representing the different levels of the healthcare system. Data were collected in four districts through: interviews with key informants working at all levels of the health system; focus group discussions with parents and caretakers and with community health workers; and interviews with individual community members whose lives had been impacted by the MNH programme. The initial content analysis was followed by a deductive synthesis pitched according to the different levels of the health system and the health-systems building blocks. Results The findings are summarised according to the health-systems building blocks and an account is given of three of the interventions most valued by participants: (1) data use for evidence-based decision making (with regard to human resources, essential reproductive health commodities, and financing); (2) establishment of special newborn care units and high-dependency maternity units at district hospitals and training of the health workforce (also with reference to other infrastructural improvements such as the provision of water, sanitation and hygiene facilities at health facilities); and (3) community referral of pregnant women through a commercial motorcycle voucher referral system. Conclusion The MNH programme in the West Nile region adopted a holistic and system-wide approach to addressing the key bottlenecks in the planning, delivery, and monitoring of quality MNH services. There was general stakeholder appreciation across the board that the interventions had the potential to improve quality of care and newborn and maternal health outcomes. However, as the funding was largely donor-driven, questions about government ownership and sustainability in the context of limited resources remain