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1.

Background  

Implementation of programs for the prevention of mother-to-child transmission (PMTCT) of HIV faces a variety of barriers and challenges. The assessment of these challenges has generally been conducted in large urban health facilities. As programs expand into rural areas, the potential barriers that may be encountered there also need to be assessed. This study examines potential barriers that might affect the acceptability of interventions for PMTCT in rural and urban settings.  相似文献   

2.

Background  

HIV remains responsible for an estimated 40% of mortality in South African pregnant women and their children. To address these avoidable deaths, eligibility criteria for antiretroviral therapy (ART) in pregnant women were revised in 2010 to enhance ART coverage. With greater availability of HIV services in public health settings and increasing government attention to poor maternal-child health outcomes, this study used the patient's journey through the continuum of maternal and child care as a framework to track and document women's experiences of accessing ART and prevention of mother-to-child HIV transmission (PMTCT) programmes in the Eastern Cape (three peri-urban facilities) and Gauteng provinces (one academic hospital).  相似文献   

3.

Background

Prevention of mother-to-child transmission of HIV (PMTCT) is a major public health challenge in Zimbabwe.

Methods

Using trained peer counselors, a nevirapine (NVP)-based PMTCT program was implemented as part of routine care in urban antenatal clinics.

Results

Between October 2002 and December 2004, a total of 19,279 women presented for antenatal care. Of these, 18,817 (98%) underwent pre-test counseling; 10,513 (56%) accepted HIV testing, of whom 1986 (19%) were HIV-infected. Overall, 9696 (92%) of women collected results and received individual post-test counseling. Only 288 men opted for HIV testing. Of the 1807 HIV-infected women who received posttest counseling, 1387 (77%) collected NVP tablet and 727 (40%) delivered at the clinics. Of the 1986 HIV-infected women, 691 (35%) received NVPsd at onset of labor, and 615 (31%) infants received NVPsd. Of the 727 HIV-infected women who delivered in the clinics, only 396 women returned to the clinic with their infants for the 6-week follow-up visit; of these mothers, 258 (59%) joined support groups and 234 (53%) opted for contraception. By the end of the study period, 209 (53%) of mother-infant pairs (n = 396) came to the clinic for at least 3 follow-up visits.

Conclusion

Despite considerable challenges and limited resources, it was feasible to implement a PMTCT program using peer counselors in urban clinics in Zimbabwe.  相似文献   

4.
Low uptake of prevention of mother-to-child transmission of HIV (PMTCT) services in resource-limited settings requires new approaches to prevent missed opportunities. Routine HIV testing ("opt-out" testing) in antenatal care (ANC) should be considered. An exploratory cross-sectional survey was conducted in 6 PMTCT sites in rural Zimbabwe. Women who had attended ANC in health centers where PMTCT was provided were surveyed in postnatal services. Of 520 women sampled, 285 (55%) had been HIV tested during their last pregnancy. Primary education or no education (P = 0.02), reporting receiving neither group education in the ANC clinic (P < 0.001) nor individual pretest counseling (P < 0.001), and having attended <6 ANC visits (P < 0.03) were associated with not having been HIV tested. Among the 235 women not HIV tested in ANC, 79% would accept HIV testing if opt-out testing was introduced. Factors associated with accepting the opt-out approach were being <20 years old (P = 0.005), having secondary education or more (P = 0.03), living with a partner (P = 0.001), and the existence of a PMTCT service where the untested women delivered. Thirty-seven women of 235 (16%) would decline routine HIV testing, mainly because of their fear of knowing their HIV status and the need to have their partner's consent. Among the women already tested in ANC (n = 285), 97% would accept the opt-out approach. In Zimbabwe, where 25% of pregnant women are HIV infected, introducing the opt-out strategy for HIV testing may have a far-reaching public health impact on PMTCT. Issues regarding, stigma, quality of post-testing counseling and staffing must be considered, however.  相似文献   

5.
Current trends in HIV/AIDS research in sub-Saharan Africa (SSA) highlight socially and culturally sensitive interventions that mobilize community members and resources for universal access to HIV prevention, treatment, and care services. These factors are particularly important when addressing the complex social and cultural nature of implementing services for prevention of mother-to-child transmission of HIV (PMTCT). Across the globe approximately 34 % fewer children were infected with HIV through the perinatal or breastfeeding route in 2011 (est. 330,000) than in 2001 (est. 500,000), but ongoing mother-to-child HIV transmission is concentrated in sub-Saharan Africa, where fully 90 % of 2011 cases are estimated to have occurred. Recent literature suggests that PMTCT in Africa is optimized when interventions engage and empower community members, including male partners, to support program implementation and confront the social, cultural and economic barriers that facilitate continued vertical transmission of HIV. In resource-limited settings the feasibility and sustainability of PMTCT programs require innovative approaches to strengthening male engagement by leveraging lessons learned from successful initiatives in SSA. This review presents an overview of studies assessing barriers and facilitators of male participation in PMTCT and new interventions designed to increase male engagement in East, West, and Central Africa from 2000–2013, and examines the inclusion of men in PMTCT programs through the lens of community and facility activities that promote the engagement and involvement of both men and women in transformative PMTCT initiatives.  相似文献   

6.

Purpose of Review

The goal of this paper is to describe areas in prevention of mother-to-child transmission of HIV (PMTCT) programs that could benefit from ehealth and to summarize current evidence of ehealth effectiveness in PMTCT.

Recent Findings

PMTCT programs require maternal retention, adherence to antiretroviral treatment (ART), and return for infant diagnosis of HIV. eHealth systems for PMTCT could either be integrated within MCH ehealth systems or within HIV adherence ehealth systems. PMTCT ehealth messages need to balance maternal concerns about pregnancy, childbirth, and infant care with need for clinic retention and ART adherence for PMTCT. Health approaches currently being assessed for effects on PMTCT outcomes include SMS, phone reminders, and integration of laboratory results and health worker reminders. Randomized trials are ongoing to determine effect of PMTCT ehealth interventions on retention, adherence, viral suppression, and early infant diagnosis (EID). There is evidence that ehealth for PMTCT improves early retention and EID, while data on long-term outcomes are accruing.

Summary

PMTCT ehealth interventions may be useful to enhance maternal retention and ART adherence and decrease risk of infant HIV infection. Ongoing clinical trials will be important to determine effectiveness of mhealth approaches in improving PMTCT outcomes.
  相似文献   

7.

Background

We evaluate the impact of clinic-based PMTCT community support by trained lay health workers in addition to standard clinical care on PMTCT infant outcomes.

Methods

In a cluster randomized controlled trial, twelve community health centers (CHCs) in Mpumalanga Province, South Africa, were randomized to have pregnant women living with HIV receive either: a standard care (SC) condition plus time-equivalent attention-control on disease prevention (SC; 6 CHCs; n? = 357), or an enhanced intervention (EI) condition of SC PMTCT plus the “Protect Your Family” intervention (EI; 6 CHCs; n? = 342). HIV-infected pregnant women in the SC attended four antenatal and two postnatal video sessions and those in the EI, four antenatal and two postnatal PMTCT plus “Protect Your Family” sessions led by trained lay health workers. Maternal PMTCT and HIV knowledge were assessed. Infant HIV status at 6 weeks postnatal was drawn from clinic PCR records; at 12 months, HIV status was assessed by study administered DNA PCR. Maternal adherence was assessed by dried blood spot at 32 weeks, and infant adherence was assessed by maternal report at 6 weeks. The impact of the EI was ascertained on primary outcomes (infant HIV status at 6 weeks and 12 months and ART adherence for mothers and infants), and secondary outcomes (HIV and PMTCT knowledge and HIV transmission related behaviours). A series of logistic regression and latent growth curve models were developed to test the impact of the intervention on study outcomes.

Results

In all, 699 women living with HIV were recruited during pregnancy (8–24 weeks), and assessments were completed at baseline, at 32 weeks pregnant (61.7%), and at 6 weeks (47.6%), 6 months (50.6%) and 12 months (59.5%) postnatally. Infants were tested for HIV at 6 weeks and 12 months, 73.5% living infants were tested at 6 weeks and 56.7% at 12 months. There were no significant differences between SC and EI on infant HIV status at 6 weeks and at 12 months, and no differences in maternal adherence at 32 weeks, reported infant adherence at 6 weeks, or PMTCT and HIV knowledge by study condition over time.

Conclusion

The enhanced intervention administered by trained lay health workers did not have any salutary impact on HIV infant status, ART adherence, HIV and PMTCT knowledge. Trial registration clinicaltrials.gov: number NCT02085356
  相似文献   

8.

Background

In the context of universal access to prevention, treatment, care and support, each country has to ensure that 80% of women and children in need have access to PMTCT interventions.

Objective

To assess the PMTCT program achievement in Ouagadougou, the capital city of Burkina Faso.

Methods

Between August and October 2008, a cross sectional study was carried out in the five health districts of the Centre Health Region. We reviewed weekly statistics from all health care centres (HCC) to compute the coverage of PMTCT program. In 38 HCC with functional PMTCT program, we extracted data of interest from HCC registers and made direct observations of PMTCT services.

Results

The PMTCT program was implemented in 49% of HCC (target for the national program: 70%). Fifteen to 31% of these centers were often in shortage for PMTCT consumables. Patients'' privacy was not observed in 67% of Voluntary Counselling & HIV Testing wards. Care providers were not qualified enough to deliver PMTCT services. Vitamin A supplementation was not implemented. None of the facilities offered the whole package of PMTCT program interventions. HCC providing HIV testing in labour or in postnatal ward were consistently lacking. Only 86% of antenatal care new attendants benefited from pre-test counselling; 2.4% of pretested women were HIV-positive and 39% of positive mothers received antiretroviral prophylaxis.

Conclusion

Coverage and quality of PMTCT programme in the Centre Health Region in Burkina Faso are still limited. Particular support is needed for training, supervision and infrastructures upgrading.  相似文献   

9.
目的通过对艾滋病病毒(HIV)感染孕产妇及所生婴儿采取预防艾滋病母婴传播措施的现状分析,探讨重庆地区预防艾滋病母婴传播干预措施实施的相关影响因素及对策。方法采用统一问卷及个案表,对68例HIV感染孕产妇进行有关检测时间、感染原因、妊娠结局、影响各种预防传播措施的实施情况的回顾性调查。结果在调查的68例HIV感染孕产妇中,22例在孕期终止了妊娠,占32.4%。28.3%的分娩产妇和68.6%的新生儿服用了抗逆转录病毒药物,100%婴儿采用了人工喂养方式。结论现行的预防艾滋病母婴传播措施是可行的。孕产妇初次产检的时间影响了孕产妇的服药比例,应该提高孕早期检测率。  相似文献   

10.
OBJECTIVES: To determine the prevalence of anemia (serum hemoglobin <10 g/dL) and assess zidovudine use and toxicity in HIV-positive pregnant women in India. METHODS: From 2002 through 2006, 24,105 pregnant women in Pune were screened for HIV and anemia. As part of an infant prevention of mother-to-child transmission (PMTCT) trial, enrolled HIV-positive women (n = 467) were assessed for anemia and associated outcomes, comparing women receiving zidovudine for >or=2 weeks versus no zidovudine. RESULTS: The prevalence of anemia was 38.7% in HIV-positive women. Anemic women were as likely as nonanemic women to receive zidovudine. At delivery, regardless of anemia status at enrollment, women receiving >or=2 weeks of zidovudine were 70% less likely to be anemic compared with women receiving no zidovudine (odds ratio = 0.28, 95% confidence interval: 0.14 to 0.57; P < 0.01), received iron and folic acid supplements for longer periods, and had no increased adverse delivery or newborn birth outcomes. CONCLUSIONS: A significant proportion of HIV-positive pregnant women in India present for antenatal care with anemia. With concurrent iron and folic acid supplementation, however, zidovudine use is not associated with persistent or worsening anemia or associated adverse outcomes. In Indian community settings, all pregnant HIV-positive women should receive early anemia treatment. Mild anemia should not limit zidovudine use for PMTCT in India.  相似文献   

11.

Background

Children living with HIV worldwide majority are infected through mother to child transmission of HIV (MTCT) acquired during pregnancy. Knowledge, attitude and behavioral changes are pivot tools towards success of any interventions.

Objectives

To determine the effectiveness of counseling on HIV done in primary health facilities (PHF), level of knowledge gained and attitude changes towards PMTCT.

Methods

A cross sectional study assessing pregnant women''s knowledge and their attitude towards PMTCT was conducted in Temeke district from October 2010 to Jan 2011 using a structured questionnaire.

Results

A total of 383 antenatal attendees were referred to Temeke district for management after counselled and tested for HIV in PHFs. Majority (86.9%) had primary education and good knowledge on MTCT. Correct timing of ARVs prophylaxis (15.7%) as preventive measures for MTCT was poor. Education and employment were associated with good knowledge on MTCT of HIV. Women had positive attitudes towards HIV counseling and testing, but stigma was a barrier to disclosure of one''s serostatus.

Conclusion

There is knowledge gap in routine PMTCT counseling among antenatal attendees in our PHFs. Effective counseling on PMTCT in the PHFs will bridge the identified knowledge gap and help in reduction of pediatric HIV.  相似文献   

12.

Background

Single dose nevirapine and a short course of zidovudine (AZT) are now administered in most hospitals in Uganda to prevent mother-to-child transmission (MTCT) of HIV. The effectiveness of these antiretroviral (ARV) regimens has been shown in the clinical trials but has not been demonstrated outside the clinical trials setting in this country.

Objectives

The study evaluated the effectiveness of short course ARV regimens in a pilot program to prevent mother-to-child transmission of HIV and determined the risk factors for perinatal transmission.

Methods

Cross-sectional study design was used to compare perinatal transmission rates of HIV in two sets of mothers: ARV-treated mothers and ARV-untreated mothers.

Results

109 treated and 90 naïve mother-infant pairs were recruited. HIV transmission rates were similar in the nevirapine (10/61) and AZT (8/48) groups (16.4% vs. 16.7%) respectively but higher in the naïve group (43/90 48%, p= 0.0001). ARV therapy offers a protective effect against MTCT of HIV (Adjusted Odds Ratio 0.22 95%CI 0.09, 0.54) but mothers in Stage 1 and 2 of disease were more likely to benefit from this intervention than mothers in Stage 3 and 4.

Conclusion

In this community-based observational study, ARV reduces the risk of perinatal transmission of HIV but does not eliminate the risk completely. Early screening of asymptomatic pregnant women will identify a group of mothers more likely to benefit from the intervention.  相似文献   

13.

Background

Children living with HIV worldwide majority are infected through mother to child transmission of HIV (MTCT) acquired during pregnancy. Knowledge, attitude and behavioral changes are pivot tools towards success of any interventions.

Objectives

To determine the effectiveness of counseling on HIV done in primary health facilities (PHF), level of knowledge gained and attitude changes towards PMTCT.

Methods

A cross sectional study assessing pregnant women''s knowledge and their attitude towards PMTCT was conducted in Temeke district from October 2010 to Jan 2011 using a structured questionnaire.

Results

A total of 383 antenatal attendees were referred to Temeke district for management after counselled and tested for HIV in PHFs. Majority (86.9%) had primary education and good knowledge on MTCT. Correct timing of ARVs prophylaxis (15.7%) as preventive measures for MTCT was poor. Education and employment were associated with good knowledge on MTCT of HIV. Women had positive attitudes towards HIV counseling and testing, but stigma was a barrier to disclosure of one''s serostatus.

Conclusion

There is knowledge gap in routine PMTCT counseling among antenatal attendees in our PHFs. Effective counseling on PMTCT in the PHFs will bridge the identified knowledge gap and help in reduction of pediatric HIV.  相似文献   

14.

Background  

Toll-like receptors (TLRs) recognize pathogen-associated molecular patterns and play a crucial role in the host's innate immune response. Genetic variations in TLR genes may influence host-viral interactions and might impact upon the risk of mother-to-child transmission (MTCT) of Human Immunodeficiency Virus type 1 (HIV-1). The aim of this study was to investigate the influence of genetic variants of TLR 9 gene on MTCT.  相似文献   

15.

Background  

Understanding infant feeding practices in the context of HIV and factors that put mothers at risk of HIV infection is an important step towards prevention of mother to child transmission of HIV (PMTCT). Face-to-face (FTF) interviewing may not be a suitable way of ascertaining this information because respondents may report what is socially desirable. Audio computer-assisted self-interviewing (ACASI) is thought to increase privacy, reporting of sensitive issues and to eliminate socially desirable responses. We compared ACASI with FTF interviewing and explored its feasibility, usability, and acceptability in a PMTCT program in Kenya.  相似文献   

16.
Background: Over 90% of infant acquired immunodeficiency syndrome (AIDS) cases have been through mother-to-child transmission (MTCT) of human immunodeficiency virus (HIV). Consequent to this, prevention of mother-to-child transmission (PMTCT) programs have instituted as dual purposes for prevention of HIV transmission from mother to child and enrollment of infected pregnant women and their families into antiretroviral treatment (ART) program. However, there are still some breakthrough infections and challenges. Therefore, this study was designed to assess risk of HIV transmission among HIV-exposed infants on follow-up at a PMTCT clinic in an antiretroviral (ARV) referral health facility in southwest Nigeria.

Methods: A cohort of 60 purposively recruited consenting pregnant women referred to PMTCT HIV clinic in Ibadan, southwest Nigeria were enrolled and followed up for 1 year (2015–2016). A well-structured epidemiological questionnaire was used to capture all relevant information. Data were then analyzed by SPSS version 21 (St. Louis, MO, USA), while bivariate and multivariate analyses were used to identify associations.

Results: A total of 44 mothers and their infants were available for the analysis with an attrition rate of 26.7%. The mean age of mothers at enrollment to follow-up was 32.9 years (SD = 4.2 years). Two (4.5%, 95% CI: 7.2–12.3%) of the infants were HIV positive by DNA PCR test. There was no linear relationship between age of the mothers with CD4 count or viral load both before and after delivery but there was a significant positive relationship with year on ARV (= 0.318, 95% CI: 0.024–0.562). Infants of rural dwelling mothers were at 3.39 (adjusted odds ratio (AOR) = 3.39, 95% CI: 1.32, 2.29) times higher risk of vertical HIV transmission compared to those of urban dwelling mothers. Infants delivered at home had 2.61(AOR = 2.61, 95% CI: 1.59, 7.91) times higher risk of MTCT compared to those delivered at health institution. Mixed feeding was also another important predictor in which the risk of MTCT was about two (AOR = 2.21, 95% CI: 0.68, 9.97) times higher compared to exclusive breastfeeding.

Conclusions: There was a high risk of MTCT of HIV among exposed infants on follow-up at the PMTCT clinic of Adeoyo Maternity Teaching referral hospital. Our findings will assist health policy makers in providing important information capable of enhancing assurance HIV control in such population and in raising the standard of PMTCT program in Nigeria.  相似文献   


17.

Background

Over the last decade, Ethiopia adopted different strategies of prevention of mother to child transmission of HIV (PMTCT). Prior to implementation of Option A in 2011, there was no provision of prophylaxis for PMTCT. With ‘Option A’, PMTCT interventions relied on maternal CD4 count. In early 2013, ‘‘Option B+’’ has been started; with this option, antiretroviral therapy is started and continued for life to any HIV positive pregnant mother irrespective of CD4 count with an enhanced treatment for the baby. Though there are a number of studies which evaluated the effectiveness of PMTCT interventions, the current study assessed the real-world effectiveness of PMTCT options in a setting where there is limitation of resources.

Objective

This study tried to address three questions: what proportion of babies tested by DNA-PCR are HIV infected in the first 2 months of life? How does the type of PMTCT intervention affect presence of HIV infection at this age? What are the factors affecting HIV transmission, after controlling for type of PMCT-HIV intervention?

Methods

We assessed records of 624 registered HIV exposed infants and 412 mothers who were delivered at Bishoftu Hospital from May 2006 to August 2014. Presence of HIV infection at 6–8 weeks of age was assessed from the records. Maternal and infant risk factors for infection at this age were analyzed. Data were collected using standard data abstraction format and were analyzed using SPSS version 20.

Results

Among all the infants who were delivered at the hospital during the study period, 624/936 (66.7 %) had undergone early infant diagnosis at 6–8 weeks. Twenty-seven (4.3 %) were positive for HIV DNA PCR at the age of 6–8 weeks. None of the infants who received ‘‘Option B+’’ had a positive HIV DNA PCR result. HIV infection rate was highest among those who took either no prophylaxis or single dose Nevirapine (11.5 and 11.1 % respectively). Those who took single dose Nevirapine and Zidovudine had HIV positivity rate of 3.9 %. Many of the covariates which were shown to be predictors on bivariate analysis were found not to be independent predictors on multivariate analysis.

Conclusion

PMTCT ‘’Option B+’’ resulted in zero HIV infection rates among the included infants. There was a high loss to follow up rate at 6–8 weeks of age. The authors recommend that a better strategy of linkage to care and treatment should be devised for HIV exposed infants.
  相似文献   

18.
BACKGROUND: Botswana has high HIV prevalence among pregnant women (37.4% in 2003) and provides free services for prevention of mother-to-child transmission (PMTCT) of HIV. Nearly all pregnant women (>95%) have antenatal care (ANC) and deliver in hospital. Uptake of antenatal HIV testing was low from 1999 through 2003. In 2004, Botswana's President declared that HIV testing should be "routine but not compulsory" in medical settings. METHODS: Health workers were trained to provide group education and recommend HIV testing as part of routine ANC services. Logbook data on ANC attendance, HIV testing, and uptake of PMTCT interventions were reviewed before and after routine testing training, and ANC clients were interviewed. RESULTS: After routine testing started, the percentage of all HIV-infected women delivering in the regional hospital who knew their HIV status increased from 47% to 78% and the percentage receiving PMTCT interventions increased from 29% to 56%. ANC attendance and the percentage of HIV-positive women who disclosed their HIV status to others remained stable. Interviews indicated that ANC clients supported the policy. CONCLUSIONS: Routine HIV testing was more accepted than voluntary testing in this setting and led to substantial increases in the uptake of testing and PMTCT interventions without detectable adverse consequences. Routine testing in other settings may strengthen HIV care and prevention efforts.  相似文献   

19.
OBJECTIVE: To determine whether data from voluntary counseling and testing (VCT)/prevention of mother-to-child transmission (PMTCT) programs can be used for HIV surveillance. METHODS: Women attending an antenatal clinic at the district hospital in Entebbe, Uganda, from May 2002 to April 2003 were offered counseling and HIV testing with same-day results (VCT) and nevirapine for PMTCT was provided for HIV-positive women and their babies. Those who declined VCT were tested for HIV anonymously. RESULTS: Overall, 2635 women accepted VCT; 883 were tested anonymously. HIV prevalence was higher in VCT than in anonymously tested women in the first month of the program (20% vs. 11%, P=0.05) and in months with <70% VCT uptake (17% vs. 8%, P<0.001) but was similar in months with high uptake. Uptake of VCT was higher in women who had risk factors for HIV, especially those who believed themselves to have been exposed (84% vs. 73%, P<0.001). CONCLUSION: There was a bias to accepting VCT in women with HIV, or risk factors for HIV infection, the former most apparent when there was low coverage. Data from VCT/PMTCT programs cannot replace anonymous surveillance for monitoring of HIV epidemic trends where coverage is incomplete within clinics or communities.  相似文献   

20.
OBJECTIVE: In Africa, prevention of mother-to-child HIV transmission (PMTCT) programs are hindered by limited uptake by women and their male partners. Routine HIV counseling and testing (HCT) during labor has been proposed as a way to increase PMTCT uptake, but little data exist on the impact of such intervention in a programmatic context in Africa. DESIGN AND METHODS: In May 2004, PMTCT services were established in the antenatal clinic (ANC) of a 200-bed hospital in rural Uganda; in December 2004, ANC PMTCT services became opt-out, and routine opt-out intrapartum HCT was established in the maternity ward. We compared acceptability, feasibility, and uptake of maternity and ANC PMTCT services between December 2004 and September 2005. RESULTS: HCT acceptance was 97% (3591/3741) among women and 97% (104/107) among accompanying men in the ANC and 86% (522/605) among women and 98% (176/180) among their male partners in the maternity. Thirty-four women were found to be HIV seropositive through intrapartum testing, representing an 12% (34/278) increase in HIV infection detection. Of these, 14 received their result and nevirapine before delivery. The percentage of women discharged from the maternity ward with documented HIV status increased from 39% (480/1235) to 88% (1395/1594) over the period. Only 2.8% undocumented women had their male partners tested in the ANC in contrast to 25% in the maternity ward. Of all male partners who presented to either unit, only 48% (51/107) came together and were counseled with their wife in the ANC, as compared with 72% (130/180) in the maternity ward. Couples counseled together represented 2.8% of all persons tested in the ANC, as compared with 37% of all persons tested in the maternity ward. CONCLUSION: Intrapartum HCT may be an acceptable and feasible way to increase individual and couple participation in PMTCT interventions.  相似文献   

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