Prevention Of Mother-to-child Transmission Research Articles

Evaluation of prevention of mother to child transmission programme at a tertiary healthcare facility in Southwestern Nigeria.

Most children acquire HIV infection as a result of mother to child transmission (MTCT). The risk of MTCT of HIV is generally estimated at between 15 and 40% without prophylaxis. MTCT was responsible for approximately 370,000 infant HIV infections worldwide with Nigeria accounting for 30%. The study evaluated the effectiveness of prevention of MTCT of HIV infection programme by determining the rate of MTCT of HIV in babies who underwent the programme by review of health records of mother- infant pairs at Olabisi Onabanjo University Teaching Hospital. This was a cross-sectional analytical conducted over twelve years period with medical records of 545 mother-infant pairs analysed. The rate of MTCT of HIV infection was 2.9% compared to 7.1% earlier reported in the centre. The rate of MTCT of HIV was lowest among mother-infant pairs who both received prophylaxis. Ages at recruitment are strong determinant of the risk of infection. Late usage of MTCT prevention service is a risk for HIV infection among exposed infants.

From Option B+ to Universal "Test and Treat" in Cameroon: Identification and Evaluation of District-level Factors Associated with Retention in Care.

Retaining women in Option B+ services is crucial for eliminating new pediatric HIV infections. However, there are few studies on factors influencing retention at the district level. This study evaluates the factors associated with retention in two health districts of Cameroon. From September 1, 2015, to February 29, 2016, we reviewed the records of pregnant and breastfeeding women initiating Option B+, a lifelong approach to preventing mother-to-child transmission (PMTCT) of HIV, between October 2013 and July 2014. We abstracted sociodemographic and clinical data from registers in 22 health facilities in the Bamenda urban and Kumba rural districts into spreadsheets. Cox regression age-adjusted survival curves were used to compare retention probabilities at 6 and 12 months post-antiretroviral therapy (ART) initiation. Multivariable modified Poisson regressions were run to estimate adjusted relative risk (aRR) of factors associated with retention in PMTCT care at 12 months post-ART initiation. STATA software was used for the analyses. Of the 560 files reviewed, majority, 62.7% (n=351), were above 24 years of age and married, 68.9% (n=386). From the multivariable analysis, enrolling early in antenatal care (ANC) (aRR: 1.50, 95% CIL: 1.17-1.93) and knowing the male partner's HIV-negative status (aRR: 1.16, 95% CI: 1.00-1.34) were significantly associated with higher retention in care, adjusting for maternal age, marital status, and distance from the health facility. By health district, knowing the male partner's HIV-negative status (aRR: 1.30, 95% CI: 1.13-1.50) in the Bamenda urban and enrolling early in ANC (aRR: 2.03, 95% CI" 1.21-3.41) in the Kumba rural district, had significantly higher retention rates after adjusting for the same covariates. Overall, factors influencing retention varied by urban or rural district. Therefore, tailored district-level interventions are needed to enhance early ANC enrollment in the rural and partner HIV status disclosure in the urban districts to improve retention in PMTCT care.

The Psychosocial Profile of Women Who Defaulted Option B+ HIV Treatment: An Interpretive Phenomenological Analysis Study.

The study explored the psychosocial profile of women who defaulted Option B+ HIV treatment at Chitungwiza Municipality clinics in Zimbabwe. Option B+ is a strategy to prevent mother-to-child transmission (PMTCT) of HIV to reduce MTCT rate to less than or equal to 5%. An interpretive phenomenological analysis (IPA) design was used. Data were collected from 04 September to 12 October 2020 on twelve purposively selected HIV-positive breastfeeding women aged 18 to 40 years, who defaulted Option B+ HIV treatment. Unstructured individual face-to-face interviews were utilised. Data were analysed thematically using the interpretive phenomenological analysis framework for data analysis. The study findings revealed that participants experienced the following: psychosocial and emotional challenges due to HIV positive results, shown emotional distress and suicidal tendencies which affected their mental health. Their relationship was derailed due to abuse, infidelity, partner's high-risk behaviour and to lack of support stemming from their partners and family members. Strengthening adherence support interventions and effective counselling on HIV-positive status disclosure and male partner involvement is important for retaining women in care and for improving their quality of life. Comprehensive, integrated, and tailor-made interventions should be adopted. Couple HIV counselling and testing should be encouraged. Psychosocial and mental health should be encouraged. Furthermore, community sensitization, risk reduction behaviour, education on purpose and side effects of ART as well as the benefits of Option B+ to new enrolments should be intensified and strengthened to minimize defaulting of treatment and LTFUP. Vigorous patient tracing and visit reminders help retain women in care.

Needs and contents of a customized digital tool for retention in care and medication adherence among pregnant and breastfeeding women living with HIV in Kilimanjaro

BackgroundRetention in care and adherence to medication among pregnant and breastfeeding women living with HIV (PBWLH) are crucial for preventing mother-to-child transmission (PMTCT) of HIV. Wide coverage of mobile phones, digital tools, including internet-enabled medication dispensers and short message service (SMS), have been recommended as potential interventions to improve adherence to medication by PBWLH. The main objective of the study was to understand the needs and contents for a customized digital tool for retention in care and medication adherence among PBWLH.MethodA mixed-methods study was conducted from September 2021 to March 2022 at five health facilities in the Kilimanjaro region. We interviewed 142 pregnant and breastfeeding women, receiving PMTCT services, using a semi-structured questionnaire. Among the interviewed, twenty breastfeeding women were purposively selected and enrolled to use an internet-enabled Wisepill medication dispenser for one month. They received different types of SMS reminders for one month, and feedback on their adherence patterns was received after one month using an adherence graph from the Wisepill digital tool. Later, exit and in-depth interviews were conducted to explore the needs and contents of a future customized digital adherence tool. Descriptive analyses for quantitative data and thematic content analyses for qualitative data were also done.ResultsAmong 142 women interviewed, 42(30%) were pregnant and 100 (70%) were breastfeeding. Most 136 (95%) had access to mobile phones and used SMS daily, while 90% were interested in receiving reminder messages. Qualitative findings revealed more insights into reminders’ content and educational SMS. Most people preferred neutral SMS, which does not contain the word “medication”. Health educational SMS content was preferred to be on breastfeeding, opportunistic diseases, nutrition and entrepreneurship education. Overall, SMSs were regarded as helpful to remind clients of medication time and the medication dispenser provided them with privacy and safe storage for their medication.ConclusionsThis study's findings will help construct useful content for future digital adherence tools to support the health of pregnant and breastfeeding women living with HIV.

BARRIERS TO EARLY DETECTION OF HIV/AIDS IN PREGNANT WOMEN IN MEDAN HELVETIA SUB-DISTRICT MEDAN CITY 2023

Pregnant women are one of the populations at risk of contracting Human immunodeficiency Virus (HIV), Syphilis, and Hepatitis B diseases in children more than 90% are infected from their mothers. The risk of mother-to-child transmission for HIV/AIDS is 20%-45%, for Syphilis is 69-80%, and for Hepatitis B is more than 90%. All three have the same transmission routes in the form of sexual intercourse, blood, and this transmission mostly occurs through vertical transmission from mother to fetus during pregnancy. Triple elimination is a program that aims to achieve and sustain mother-to-infant elimination of HIV/AIDS, Hepatitis B, and Syphilis in order to achieve better health for women, children, and their families through a coordinated approach. Detection and prevention of HIV incidence during pregnancy or postpartum should be prioritized and is essential to reduce mother-to-child transmission of HIV. In line with the increasing cases of mother-to-child HIV transmission, the government has made various control efforts through the PPIA or PMTCT (Prevention of Mother-to-Child Transmission) program. This research used field research to obtain qualitative data. Researchers go to the field to make observations about a phenomenon in a natural situation and are closely related to participant-observation. The results of the research obtained ANC services have been running well. Barriers to ANC access are related to cultural aspects and organizational systems that have not made maximum efforts to improve services, especially STIs (HIV/AIDS). At Puskesmas Helvetia, every pregnant woman will be directed to do HIV testing. Integrated ANC services have been running well. Routine technical training to improve obstetric competence for midwives and other supporting training needed as well as laboratory examination training for laboratory analysts (including STI and HIV/AIDS testing training) has been running well and systematically.

Low Prevalence and Risk Factors Related to HIV-1 Mother to Child Transmission under Option B+ Program at 3 Referral Military and Public Hospitals in Cameroon

Immunodeficiency Virus type 1 (HIV-1) Mother-To-Child Transmission (MTCT) prevalence and its predictors. Following the limited success achieved with the previous MTCT prevention programs, the Cameroon’s public health ministry adopted in 2014 the Option B+ program that recommends a systematic lifelong treatment to all HIV positive pregnant woman.
 Study Design: A case-control study was conducted within two groups: a reference group constituted of exposed infants from HIV positive mothers undergoing Option B+ program, and a control group of infants from Anti-Retroviral Treatment (ART) naive HIV positive mothers during pregnancy.
 Place and Duration of Study: Douala and Yaounde Military Hospitals (HMR2 and HMR1 respectively) as well as the Bertoua Regional Hospital (HRB), From October 2017 to March 2018.
 Methodology: This research included infected mother - exposed child pairs. Infected mothers’ sociodemographic and clinical characteristics were reported. Infants sampled at six weeks at the HIV MTCT prevention units were tested at the Military Health Research Center for HIV-1 RNA early detection through rtPCR with Abbott m2000sp automated system. Multivariate logistic regression model was built to assess the predictors of MTCT and to compare groups.
 Results: Within the study period, the overall HIV-1 prevalence in the 107 six weeks old reference group infants and 23 control group infants was nil and 4.35% (1/23) respectively. Logistic regression showed that predictors of HIV-1 MTCT were: home delivery p=0.03 and absence of ART during pregnancy p = 0.04.
 Conclusion: Vertical transmission of HIV-1 infection is more likely in ART naïve pregnant women as compared to their counterparts established on ART. Hence, implementation of the Option B+ appear to be very essential in eliminating HIV-1 MTCT. Consequently, a systematic enrolment of these pregnant women living with HIV if scaled up, would be very instrumental in eliminating HIV-1 MTCT in Cameroon.

Prevention-of-mother-to-child-transmission (PMTCT) program outcomes in South Africa in the pre-COVID and COVID eras

IntroductionTwo decades after implementing the Prevention of Mother to Child transmission (PMTCT) program, South Africa has still not managed to eliminate intrauterine mother-to-child (MTCT) HIV transmission. During the COVID pandemic access to maternal health services was reduced, potentially compromising the PMTCT program.MethodA retrospective record review was conducted at a midwife-run obstetric unit in a high HIV prevalence setting. Data on pregnant women who delivered between January 2019 and December 2020 were analysed to evaluate predictors for MTCT, and compare pre-COVID and COVID-era changes in maternal and infant HIV incidence and prevalence.ResultsA total of 1660 women delivered at the facility over a 24-month period (Jan 2019-Dec 2020), of whom 92.8% enrolled for antenatal care in 2019 and 94.6% in 2020. A significantly greater proportion of women were aware of their HIV status before enrolling for antenatal care in the pre-COVID (2019) than COVID (2020) period (88% vs 40.2%; p < 0.05). There was a significant increase in new HIV infection after enrolling for antenatal care during the COVID period compared to pre-COVID period (120 vs 62 women, p < 0.05). There was also a significant increase in the HIV prevalence among women who delivered during the COVID period than in the pre-COVID era (43.5% compared to 35.8%, p < 0.05). However, more than 95% of HIV-positive women initiated ART in both periods. Overall, a total of thirteen infants tested HIV positive (2.1% MTCT rate), with no difference in MTCT between 2019 and 2020. Infants born to women on antiretroviral therapy (ART) were 93% less likely to have a positive PCR test than those whose mothers who were not on ART. (OR = 0.07, 95% CI 0.031:0.178, p < 0.05).ConclusionThe increase in maternal HIV incidence and prevalence during the COVID era suggest a lapse in HIV prevention strategies during the COVID pandemic. There is an urgent need to improve community test-and-treat campaigns among women of reproductive age in the community and increase access to HIV pre-exposure prophylaxis for pregnant women, especially during periods of health crises.

Availability and readiness of the health facilities to provide HIV counseling and testing and prevention of mother-to-child transmission services in Burkina Faso: a trend analysis from 2012 to 2018

BackgroundProvider-Initiated HIV Testing and Counseling (PITC) and Prevention of Mother-To-Child Transmission (PMTCT) are key services for achieving the goal of complete elimination of HIV. However, there is limited evidence on the ability of health facilities to provide these services in Burkina Faso. Therefore, we aimed to assess the trends and disparities in the availability and readiness of health facilities to provide PITC and PMTCT services in Burkina Faso between 2012 and 2018.MethodsWe performed a secondary analysis of facility-level data from the World Health Organization’s Service Availability and Readiness Assessment (SARA) surveys conducted in 2012, 2014, 2016, and 2018 in Burkina Faso. The availability and readiness of health facilities were assessed using SARA’s manual, and linear regressions were used to examine trends.ResultsBetween 2012 and 2018, the mean proportion of health facilities providing PITC services increased, but not significantly, from 82.9% to 83.4% (p = 0.11), with the mean readiness index significantly decreasing from 71.5% to 65.4% (p < 0.001). This decrease concerned the staff and guidelines (73.8% to 50.5%; p < 0.001), equipment (79.0% to 77.4%; p < 0.001), and medicines and commodities (54.2% to 45.2%; p < 0.001) domains. Regarding the PMTCT services, the mean proportion of health facilities globally providing the service significantly decreased from 83.7% in 2012 to 67.7% (p = 0.030) in 2018, and the mean readiness significantly decreased from 53.2% in 2012 to 50.9% in 2018 (p = 0.004). This decreasing trend was related to the staff and training (80.3% to 57.6%; p < 0.001) and medicines and commodities (9.2% to 6.5%; p < 0.001) domains. The global significant negative trend of readiness was mainly observed at the primary level of healthcare (52.7% to 49.4%; p = 0.030). Four regions experienced a significant decrease in the readiness index of health facilities to provide PMTCT services: Cascades, Centre, Centre-Sud, and Sud-Ouest, while Haut-Bassins and Nord regions showed increasing trends.ConclusionAvailability and readiness of health facilities to provide PITC and PMTCT remain suboptimal in Burkina Faso. Actions to strengthen the skills of professionals and enhance the availability of medicines and commodities while focusing more on health regions with significant decreasing trends are urgently needed to improve the quality of services for HIV.

Determinants of Mother to Child Transmission of HIV in Public Hospitals of West Shewa Zone, Oromiya Region: Mixed Method Study.

Background Mother-to-child transmission of HIV (MTCT) occurs when a mother infected with the human immunodeficiency virus (HIV) passes the virus to her child. Without intervention, the transmission rate of HIV ranges from 15% to 45%. With effective interventions, this rate can be reduced to below 5%. Ethiopia aimed to reduce transmission to lower than 5% by 2020, but their final MTCT rate was 15% in 2016. The aim of this study was to identify the determinants of HIV transmission from mother to child in the West Shoa Zone of the Oromiya region. Methods: This study employs mixed methods, including an unmatched case-control study among children who tested HIV positive and negative at the end of Prevention of Mother-to-Child Transmission (PMTCT) follow-up and one -on - one interview. Additionally, one-on-one interviews with mothers of positive infants were conducted. Variables of interest were collected using structured and semi-structured questionnaires and data abstraction forms from mothers of exposed infants, medical records of mothers, and children. Results: The majority of cases (70.8%) were not included in the Option B+ program. Home delivery increases the chance of HIV transmission by six times, AOR=6.0; CI (1.5–29.2). None-inclusion in the Option B+ program increases the chance of transmission by 18 times, AOR=18.0; CI (5.0–68.1). Partner non-involvement in HIV care increases the chance of transmission by 7.3 times, AOR=7.3; CI (1.1–37.4). The mother-to-mother support program decreases the chance of transmission by 86.5%, AOR=0.13; CI (0.11–0.39). Poor antenatal care (ANC) awareness and practices among rural residents, and unstable marriage in urban residents, contribute to unaware MTCT of HIV. Conclusion: ART clinics should focus on and strengthen the mother-to-mother support program, create space for partner involvement in HIV care, and provide training for Health Extension Workers (HEWs). Health education and awareness creation should be implemented by HEWs to improve ANC practices, reduce home delivery, and increase voluntary counseling and testing among residents.

Using the RE-AIM Framework to Evaluate Implementation of Male Involvement Strategies to Optimize the PMTCT Program in Malawi: A Mixed-Methods Study.

Involvement of male partners has been shown to be key for the prevention of mother-to-child HIV transmission (PMTCT). Despite the recorded success, uptake and implementation of strategies to involve men in PMTCT continues to be low in Malawi. In this study, we used the Reach Effectiveness Adoption Implementation and Maintenance (RE-AIM) implementation science framework to explore the implementation of male involvement (MI) strategies in Lilongwe, Malawi. We used a cross-sectional mixed-methods complementary-concurrent design from September to October 2020 in two health facilities. Qualitatively, we used a phenomenological approach and conducted seven focus group discussions (FGDs), three with women and four with men. We further conducted four key informant interviews (KIIs) among health care workers. Quantitatively, we conducted a cross-sectional study comprising 138 men presenting at an antenatal clinic (ANC). We used univariate analysis in Stata for the quantitative data, whereas a manual thematic analysis was applied to the qualitative data. Implementation and adoption of the strategies was high among health providers and there were indications of maintenance of the strategies. Provider's attitude, coordinated service provision, integrated training and service provision, information provision, and baby's HIV outcomes were driving factors in implementing the MI strategies. These factors have contributed to the sustained implementation of the strategies over time. In contrast, financial and time constraints, inadequate human resources, and male-friendly spaces impede the implementation of MI strategies. Improving MI will require a systems approach considering health system and individual-level factors for both providers and consumers.

Retesting of Patients Receiving Antiretroviral Treatment at HIV Care and Treatment and Prevention of Mother-To-Child HIV Transmission Sites in Cameroon

The World Health Organization recommends retesting of newly diagnosed HIV cases for verification of results prior to antiretroviral therapy (ART) initiation. This study aimed at ascertaining the HIV status of clients on lifelong ART. We tested 25% of ART clients in 6 care and treatment (C&amp;T) sites and all HIV-positive women receiving ART in 22 prevention of mother-to-child HIV transmission (PMTCT) sites in Northwest and Southwest regions. Testing was proposed consecutively to clients in group education sessions during ART refill visit until the sample size was achieved. Individual counselling was provided to clients who opted to be retested. Testing was with Determine HIV-1/2 and First Response rapid tests and further testing was with DNA-PCR. Clients with negative test results were counseled to discontinue ART. Results were analyzed comparing misdiagnosis at ART and PMTCT sites. A total of 4526 ART clients were retested for HIV; 3914(86.5%) from ART and 612(13.5%) from PMTCT sites. Female participants dominated (79%) and the median age was 39 years. Higher proportions of clients retested at PMTCT sites were negative with both tests (0.8% vs 0.1%) and had discordant results (1.1% vs 0.4%) than at ART sites. All 32 clients with negative or discordant results were tested with DNA-PCR and 22(0.5%) were negative; 11(0.3%) in ART and 11(1.8%) in PMTCT sites. HIV positive status was confirmed for 99.5% of clients retested, with a lower rate at PMTCT (98.2%) than C&amp;T (99.7%) sites; meaning misdiagnosis and inappropriate ART treatment was more likely at PMTCT. Adherence to recommendation for HIV retesting for verification will reduce inappropriate treatment. Keywords: HIV, Retesting, Misdiagnosis, Care and Treatment Centre, PMTCT, Cameroon

Midwives' perceptions of and attitudes towards prevention of mother-to-child-transmission of HIV.

Prevention of mother-to-child transmission (PMTCT) of HIV services has become an integral part of antenatal services. Prevention of mother-to-child transmission was introduced in all the regions of Ghana, but mother-to-child transmission (MTCT) continued to increase. To explore and describe midwives' perceptions and attitudes towards PMTCT of HIV services. Quantitative research approach and descriptive cross-sectional design were used. The population includes all midwives between the ages of 21 and 60 years who work in antenatal care (ANC) clinics in 11 district hospitals in the Central Region of Ghana where the study was conducted. Forty-eight midwives were interviewed using a census sample process. Data were analysed using the Statistical Package for the Social Sciences version 21. Correlation analysis was performed to find the relationships between the attitudes and the perceptions of the midwives on PMTCT of HIV services. Seventy percent of midwives had positive perceptions of PMTCT of HIV services and 85% had positive attitudes towards the provision of PMTCT of HIV services. Midwives were screening all pregnant women who visited the ANCs and referring those who tested positive to other institutions where they can be monitored. Some of the concerns considered were views on retesting HIV-infected pregnant women throughout their pregnancy. There was a positive correlation between attitudes and perceptions of midwives on PMTCT of HIV services. Midwives had positive perceptions and positive attitudes towards the PMTCT of HIV services that they were providing to antenatal attendees. Also, as the attitudes of the midwives towards PMTCT of HIV services improved, their perceptions of PMTCT services also improved.Contribution: Decentralisation of PMTCT of HIV services to community-based health facilities is appropriate to enable sub-district health facilities to test for HIV and provide counselling services to pregnant women.

The effect of an interactive weekly text-messaging intervention on retention in prevention of mother-to-child transmission of HIV care: a randomised controlled trial (WelTel PMTCT)

Retention in prevention of mother-to-child transmission (PMTCT) care is critical to prevent vertical HIV transmission and reduce morbidity and mortality of mother-infant pairs. We investigated whether weekly, interactive text-messaging improved 18-month postpartum retention in PMTCT care. This randomised, two-armed, parallel trial was conducted at six PMTCT clinics in western Kenya. Pregnant women with HIV at least 18 years of age with access to a mobile phone, able to text-message, or had somebody who could text on their behalf, were eligible. Participants were randomly assigned at a 1:1 ratio in block sizes of four to the intervention or control group. The intervention group received weekly text messages asking “How are you?” (“Mambo?” in Swahili) and were requested to respond within 48 h. Healthcare workers called women who indicated a problem or did not respond. The intervention was administered up to 24 months after delivery. Both groups received standard care. The primary outcome was retention in care at 18 months postpartum (i.e., clinic attendance 16–24 months after delivery based on data from patient files, patient registers and Kenya’s National AIDS and STI Control Programme database), which was analysed by intention-to-treat. Researchers and data collectors were masked to group assignment, while healthcare workers were not. Between June 25th, 2015, and July 5th, 2016, we randomly assigned 299 women to the intervention and 301 to standard care only. Follow-up concluded on July 26th, 2019. The proportion of women retained in PMTCT care at 18 months postpartum was not significantly different between the intervention (n = 210/299) and control groups (n = 207/301) (risk ratio 1.02, 95% confidence interval 0.92–1.14, p = 0.697). No adverse events related to the mobile phone intervention were reported. Weekly, interactive text-messaging was not associated with improved retention in PMTCT care at 18 months postpartum or linkage to care up to 30 months postpartum in this setting. (ISRCTN No. 98818734).

Positivity rate, trend and associated risk factors of mother-to-child transmission of HIV among HIV-exposed infants

BackgroundMother-To-Child-Transmission (MTCT) of Human Immunodeficiency Virus (HIV) occurs during pregnancy, delivery and breastfeeding, and cause infection among several new-borns. However, there is limited recent evidence on the burden of MTCT of HIV in Ethiopia from a large-scale data. Thus, this study aimed to determine the positivity rate, trend and associated risk factors of MTCT among HIV-exposed infants.MethodologyA cross-sectional study was conducted among 5,679 infants whose specimen referred to Ethiopian Public Health Institute HIV referral laboratory for Early Infant Diagnosis (EID) from January 01, 2016, to December 31, 2020. Data were extracted from the national EID database. Frequencies and percentages were used to summarize the data on characteristics of infants. Logistic regression analysis was employed to identify factors associated with positivity rate of MTCT of HIV. Level of significance was set at 5%.ResultsThe mean age of the infants was 12.6 (± 14.6) weeks with an age range of 4 to 72 weeks. Half of the infants (51.4%) were female. The positivity rate of MTCT decreased from 2.9% in 2016 to 0.9% in 2020 with five-year average positivity rate of 2.6%. HIV test after six weeks (Adjusted odds ratio (AOR) = 2.7; 95% confidence interval (CI): (1.8–4.0,)); p < 0.001), absence of prevention of mother-to-child-transmission (PMTCT) service (AOR = 4.6; 95% CI: (2.9–7.4)); p = 0.001), nevirapine prophylaxis not received (AOR = 2.0; 95% CI: (1.3–3.2)); p < 0.001), and unknown ART status of the mother at delivery (AOR = 11; 95% CI: (5.5–22.1)); p < 0.001) were significantly associated with MTCT of HIV.ConclusionThe positivity rate of MTCT of HIV was showing declining tendency gradually in the study period. Strengthening PMTCT service, early HIV screening and starting ART for pregnant women, and early infant diagnosis are required to reduce the burden of HIV infection among infants exposed to HIV.

HIV testing and knowledge on mother-to-child transmission among pregnant women attending antenatal care at Vanga Hospital, Democratic Republic of Congo.

Human immunodeficiency virus (HIV) causes an infectious disease that can be transmitted from an infected mother to her child. Prevention of Mother-to-Child Transmission (PMTCT) programs provide a range of services to women and children that can reduce the risk of vertical transmission of HIV. Unfortunately, PMTCT programs face many challenges in the rural Democratic Republic of Congo (DRC). A cross-sectional study was conducted among 460 pregnant women attending antenatal care at Vanga Hospital in the Vanga health zone, DRC from March 11th to June 25th, 2019. Serological tests were performed and a pre-tested questionnaire regarding HIV knowledge was given to all participants. Data were analyzed with STATA 13.0. Descriptive statistics of key variables were computed and logistic regression was used to assess the association between participant's characteristics and knowledge of MTCT. Among the participants, 95.4% (439/460) reported that they have heard about HIV, 82.4% (378/460) indicated sexual intercourse as one of the routes of HIV transmission but only 30.4% (139/460) mentioned MTCT as one of the routes. In addition, only 10.1% (46/460) had knowledge of the existence of PMTCT. Participants' age (>29 years), education level, previous antenatal care, and previous HIV tests were significantly associated with knowledge of MTCT. Also, age (>29 years) and education level were significantly associated with previous HIV test uptake. Most pregnant women 82.3% (376/460) reported that they have never been tested in the past for HIV infection and the prevalence was at 0.9% (4/460). Knowledge of MTCT of HIV, previous uptake of HIV testing, and prevalence was low. The rural setting of Vanga and insufficient HIV sensitization activities are considered contributors to this. While the low prevalence is a positive finding, much needs to be done to improve the uptake of HIV testing and knowledge of HIV MTCT.

Programmatic Approach to Hearing Health in Low- and Middle-Income Countries

Programmatic Approach to Hearing Health in Low- and Middle-Income Countries

Association of vitamin D and polymorphisms of its receptor with antiviral therapy in pregnant women with hepatitis B.

The interruption of mother-to-child transmission (MTCT) is considered important to decrease the individual and population morbidity of hepatitis B virus (HBV) infection as well as the global burden of hepatitis B. Serum vitamin D (VD) is associated with hepatitis B. To assess whether baseline VD levels and single nucleotide polymorphisms of the VD receptor gene (VDR SNPs) are associated with the efficacy of tenofovir disoproxil fumarate (TDF) in the prevention of MTCT in pregnant women with high HBV viral loads. Thirty-eight pregnant women who were at high risk for MTCT of HBV (those with an HBV DNA level ≥ 2 × 105 IU/mL during 12-24 wk of gestation) receiving antiviral therapy of TDF between June 1, 2019 and June 30, 2021 in Mianyang were included in this retrospective study. The women received 300 mg TDF once daily from gestational weeks 24-28 until 3 mo after delivery. To further characterize the clinical relevance of maternal serum HBV DNA levels, we stratified patients according to HBV DNA level as follows: Those with levels < 2 × 105 (full responder group) vs those levels ≥ 2 × 105 IU/mL (partial responder group) at delivery. Serum levels of 25-hydroxyvitamin D [25(OH)D], liver function markers, virological parameters, VDR SNPs and other clinical parameters were collected to analyze their association with the efficacy of TDF. The Mann-Whitney U test or t test was used to analyze the serum levels of 25(OH)D in different groups. Multiple linear regressions were utilized to analyze the determinants of the maternal HBV DNA level at delivery. Univariate and multivariate logistic regression analyses were employed to explore the association of targeted antiviral effects with various characteristics at baseline and delivery. A total of 38 pregnant women in Mianyang City at high risk for MTCT of HBV were enrolled in the study. The MTCT rate was 0%. No mother achieved hepatitis B e antigen or hepatitis B surface antigen (HBsAg) clearance at delivery. Twenty-three (60.5%) participants were full responders, and 15 (39.5%) participants were partial responders according to antiviral efficacy. The present study showed that a high percentage (76.3%) of pregnant women with high HBV viral loads had deficient (< 20 ng/mL) or insufficient (≥ 20 but < 31 ng/mL) VD levels. Serum 25(OH)D levels in partial responders appeared to be significantly lower than those in full responders both at baseline (25.44 ± 9.42 vs 17.66 ± 5.34 ng/mL, P = 0.006) and delivery (26.76 ± 8.59 vs 21.24 ± 6.88 ng/mL, P = 0.044). Serum 25(OH)D levels were negatively correlated with maternal HBV DNA levels [log(10) IU/mL] at delivery after TDF therapy (r = -0.345, P = 0.034). In a multiple linear regression analysis, maternal HBV DNA levels were associated with baseline maternal serum 25(OH)D levels (P < 0.0001, β = -0.446), BMI (P = 0.03, β = -0.245), baseline maternal log10 HBsAg levels (P = 0.05, β = 0.285) and cholesterol levels at delivery (P = 0.015, β = 0.341). Multivariate logistic regression analysis showed that baseline serum 25(OH)D levels (OR = 1.23, 95%CI: 1.04-1.44), maternal VDR Cdx2 TT (OR = 0.09, 95%CI: 0.01-0.88) and cholesterol levels at delivery (OR = 0.39, 95%CI: 0.17-0.87) were associated with targeted antiviral effects (maternal HBV DNA levels < 2 × 105 at delivery). Maternal VD levels and VDR SNPs may be associated with the efficacy of antiviral therapy in pregnant women with high HBV viral loads. Future studies to evaluate the therapeutic value of VD and its analogs in reducing the MTCT of HBV may be justified.

Resistance rates among antiretroviral regimens in pregnant people living with HIV.

To update nucleoside reverse transcriptase inhibitor (NRTI), nonnucleoside reverse transcriptase inhibitor (NNRTI) and protease inhibitor (PI) resistance rates and describe the frequency of HIV subtypes in a cohort of pregnant people living with HIV (PPLH) at a national Prevention of Mother-To-Child HIV Transmission (PMTCT) centre. We evaluated genotypic resistance among PPLH during prenatal care who were antiretroviral therapy-naïve or experienced. We determined mutations by the Surveillance of Drug Resistance Mutations (SDRM) dataset and also focused on studying participants with intermediate or high resistance defined through the Stanford score. From 2018 to 2021, 1170 PPLH received prenatal care at the centre and 550 were genotyped. Among the 295 SDRMs, with respect to NRTI resistance mutations, there were 27/295 (9.2%) M184V/I, 14/295 (4.7%) T215Y/C/D/E/F/V/I/S and 12/295 (4.1%) M41L. For NNRTI, there were 75/295 (25.4%) K103N, 18/295 (6.1%) M230L and 14/295 (4.7%) G190A/E/S mutations. For PI, the most frequent mutations were 13/295 (4.4%) V82A/S/F/T, 12/295 (4.1%) M46I/L and 10/295 (3.4%) D30N. Based on the Stanford score, 36/224 (16%) naïve participants had one or more antiretroviral resistance mutations, 81% of whom had NNRTI resistance. In the treatment-experience group, 108/326 (33%) had one or more mutations, 91% of whom had NNRTI resistance. The most frequent HIV subtype was B (82.5%). Our findings suggest that continuous surveys of HIV genotype appear to be important tools to map the distribution and evolution of HIV subtypes and resistance to provide information to support treatment policies. Furthermore, concerns about the use of rilpivirine-containing regimens underscore the importance of resistance surveillance.

Short-term toxicity assessment of combined use of Zidovudine, Lamivudine, and Lopinavir/Ritonavir in vitro and in vivo.

A combination of zidovudine (AZT), lamivudine (3TC), and lopinavir/ritonavir (LPV/r) is one of the most effective drugs for preventing mother-to-child transmission (PMTCT) of HIV. However, limited information is available regarding its systemic toxicity. This study aimed to investigate its potential toxicity. An acute oral toxicity test was conducted to assess the potential acute toxicity of AZT + 3TC + LPV/r. Bacterial reverse mutation, mammalian erythrocyte micronucleus, and mouse spermatogonia chromosomal aberration tests were conducted to assess its potential genotoxicity. A 28-day feeding test was conducted to assess the potential subacute toxicity. In mice, the LD50 of the AZT + 3TC + LPV/r mixture was greater than 2000 mg/kg body weight (BW). The rate of micronucleated polychromatic erythrocytes (PCEs) increased in a dose-dependent manner in mice (P<0.01). After treatment with AZT + 3TC + LPV/r for 28 days, the BW gain of male and female rats in the high-dose group was lower than that in the control group (P<0.05); the relative weights of the liver, kidney, spleen, and brain increased (P<0.05); and pathological abnormalities appeared in the thyroid and spleen of male and female rats in the high-dose group. The hemoglobin (HGB) and red blood cells (RBCs) count in male and female rats decreased, but the white blood cells (WBCs) and lymphocyte apoptosis rates in male and female rats in the high-dose group increased (P<0.05). The total protein, albumin, cholesterol, and blood glucose levels of male and female rats in the high-dose group were significantly decreased (P<0.05). The alanine aminotransferase (ALT), alkaline phosphatase (ALP), lactate dehydrogenase (LDH), creatinine (Cr) and blood urea nitrogen (BUN) levels of male and female rats in the medium- and high-dose groups increased significantly (P<0.05). The results suggest that AZT + 3TC + LPV/r may exhibit genotoxicity and subacute toxicity under experimental conditions.

Residual risk of mother-to-child transmission of HBV despite timely Hepatitis B vaccination: a major challenge to eliminate hepatitis B infection in Cambodia

BackgroundIn countries with intermediate or high hepatitis B virus (HBV) endemicity, mother-to-child transmission (MTCT) represents the main route of chronic HBV infection. There is a paucity of information on HBV MTCT in Cambodia. This study aimed to investigate the prevalence of HBV infection among pregnant women and its MTCT rate in Siem Reap, Cambodia.MethodsThis longitudinal study included two parts, study-1 to screen HBsAg among pregnant women and study-2 to follow up babies of all HBsAg-positive and one-fourth of HBsAg-negative mothers at their delivery and six-month post-partum. Serum or dried blood spot (DBS) samples were collected to examine HBV sero-markers by chemiluminescent enzyme immunoassay (CLEIA), and molecular analyses were performed on HBsAg-positive samples. Structured questionnaires and medical records were used to examine the risk factors for HBV infection. MTCT rate was calculated by HBsAg positivity of 6-month-old babies born to HBsAg-positive mothers and ascertained by the homology of HBV genomes in mother–child pair at 6-month-old.ResultsA total of 1,565 pregnant women were screened, and HBsAg prevalence was 4.28% (67/1565). HBeAg positivity was 41.8% and was significantly associated with high viral load (p < 0.0001). Excluding subjects who dropped out due to restrictions during COVID-19, one out of 35 babies born to HBsAg-positive mothers tested positive for HBsAg at 6 months of age, despite receiving timely HepB birth dose and HBIG, followed by 3 doses of HepB vaccine. Hence the MTCT rate was 2.86%. The mother of the infected baby was positive for HBeAg and had a high HBV viral load (1.2 × 109 copies/mL). HBV genome analysis showed 100% homology between the mother and the child.ConclusionsOur findings illustrate the intermediate endemicity of HBV infection among pregnant women in Siem Reap, Cambodia. Despite full HepB vaccination, a residual risk of HBV MTCT was observed. This finding supports the recently updated guidelines for the prevention of HBV MTCT in 2021, which integrated screening and antiviral prophylaxis for pregnant women at risk of HBV MTCT. Furthermore, we strongly recommend the urgent implementation of these guidelines nationwide to effectively combat HBV in Cambodia.