Ramesh Bhosale

Extended-dose nevirapine to 6 weeks of age for infants to prevent HIV transmission via breastfeeding in Ethiopia, India, and Uganda: an analysis of three randomised controlled trials.

BACKGROUND UNICEF/WHO recommends that infants born to HIV-infected mothers who do not have access to acceptable, feasible, affordable, sustainable, and safe replacement feeding should be exclusively breastfed for at least 6 months. The aim of three trials in Ethiopia, India, and Uganda was to assess whether daily nevirapine given to breastfed infants through 6 weeks of age can decrease HIV transmission via breastfeeding. METHODS HIV-infected women breastfeeding their infants were eligible for participation. Participants were randomly assigned to receive either single-dose nevirapine (nevirapine 200 mg to women in labour and nevirapine 2 mg/kg to newborns after birth) or 6 week extended-dose nevirapine (nevirapine 200 mg to women in labour and nevirapine 2 mg/kg to newborn babies after birth plus nevirapine 5 mg daily from days 8-42 for the infant). The randomisation sequences were generated by computer at a central data coordinating centre. The primary endpoint was HIV infection at 6 months of age in infants who were HIV PCR negative at birth. Analyses were by modified intention to treat, excluding infants with missing specimens and those with indeterminate or confirmed HIV infection at birth. These studies are registered with ClinicalTrials.gov, numbers NCT00074399, NCT00061321, and NCT00639938. FINDINGS 2024 liveborn infants randomised in the study had at least one specimen tested before 6 months of age (1047 infants in the single-dose group and 977 infants in the extended-dose group). The modified intention-to-treat population included 986 infants in the single-dose group and 901 in the extended-dose group. At 6 months, 87 children in the single-dose group and 62 in the extended-dose group were infected with HIV (relative risk 0.80, 95% CI 0.58-1.10; p=0.16). At 6 weeks of age, 54 children in the single-dose group and 25 in the extended-dose group were HIV positive (0.54, 0.34-0.85; p=0.009). 393 infants in the single-dose group and 346 in the extended-dose group experienced grade 3 or 4 serious adverse events during the study (p=0.54). INTERPRETATION Although a 6-week regimen of daily nevirapine might be associated with a reduction in the risk of HIV transmission at 6 weeks of age, the lack of a significant reduction in the primary endpoint-risk of HIV transmission at 6 months-suggests that a longer course of daily infant nevirapine to prevent HIV transmission via breast milk might be more effective where access to affordable and safe replacement feeding is not yet available and where the risks of replacement feeding are high. FUNDING US National Institutes of Health; US National Institute of Allergy and Infectious Diseases; Fogarty International Center.

Postpartum Tuberculosis Incidence and Mortality among HIV-Infected Women and Their Infants in Pune, India, 2002–2005

BACKGROUND In contrast with many other countries, isoniazid preventative therapy is not recommended in clinical care guidelines for human immunodeficiency virus (HIV)-infected persons with latent tuberculosis (TB) in India. METHODS Seven hundred fifteen HIV-infected mothers and their infants were prospectively followed up for 1 year after delivery at a public hospital in Pune, India. Women were evaluated for active TB during regular clinic visits, and tuberculin skin tests were performed. World Health Organization definitions for confirmed, probable, and presumed TB were used. Poisson regression was performed to determine correlates of incident TB, and adjusted probabilities of mortality were calculated. RESULTS Twenty-four of 715 HIV-infected women who were followed up for 480 postpartum person-years developed TB, yielding a TB incidence of 5.0 cases per 100 person-years (95% confidence interval [CI], 3.2-7.4 cases per 100 person-years). Predictors of incident TB included a baseline CD4 cell count <200 cells/mm(3) (adjusted incident rate ratio [IRR], 7.58; 95% CI, 3.07-18.71), an HIV load >50,000 copies/mL (adjusted IRR, 3.92; 95% CI, 1.69-9.11), and a positive tuberculin skin test result (adjusted IRR, 3.08; 95% CI, 1.27-7.47). Three (12.5%) of 24 women with TB died, compared with 7 (1.0%) of 691 women without TB (IRR, 12.2; 95% CI, 2.03-53.33). Among 23 viable infants with mothers with TB, 2 received a diagnosis of TB. Four infants with mothers with TB died, compared with 28 infants with mothers without TB (IRR, 4.71; 95% CI, 1.19-13.57). Women with incident TB and their infants had a 2.2- and 3.4-fold increased probability of death, respectively, compared with women without active TB and their infants, controlling for factors independently associated with mortality (adjusted IRR, 2.2 [95% CI, 0.6-3.8] and 3.4 [95% CI, 1.22-10.59], respectively). CONCLUSIONS Among Indian HIV-infected women, we found a high incidence of postpartum TB and associated postpartum maternal and infant death. Active screening and targeted use of isoniazid preventative therapy among HIV-infected women in India should be considered to prevent postpartum maternal TB and associated mother-to-child morbidity and mortality.

Nevirapine Resistance and Breast-Milk HIV Transmission: Effects of Single and Extended-Dose Nevirapine Prophylaxis in Subtype C HIV-Infected Infants

Background Daily nevirapine (NVP) prophylaxis to HIV-exposed infants significantly reduces breast-milk HIV transmission. We assessed NVP-resistance in Indian infants enrolled in the “six-week extended-dose nevirapine” (SWEN) trial who received single-dose NVP (SD-NVP) or SWEN for prevention of breast-milk HIV transmission but who also acquired subtype C HIV infection during the first year of life. Methods/Findings Standard population sequencing and cloning for viral subpopulations present at ≥5% frequency were used to determine HIV genotypes from 94% of the 79 infected Indian infants studied. Timing of infection was defined based on when an infants blood sample first tested positive for HIV DNA. SWEN-exposed infants diagnosed with HIV by six weeks of age had a significantly higher prevalence of NVP-resistance than those who received SD-NVP, by both standard population sequencing (92% of 12 vs. 38% of 29; p = 0.002) and low frequency clonal analysis (92% of 12 vs. 59% of 29; p = 0.06). Likelihood of infection with NVP-resistant HIV through breast-milk among infants infected after age six weeks was substantial, but prevalence of NVP-resistance did not differ among SWEN or SD-NVP exposed infants by standard population sequencing (15% of 13 vs. 15% of 20; p = 1.00) and clonal analysis (31% of 13 vs. 40% of 20; p = 0.72). Types of NVP-resistance mutations and patterns of persistence at one year of age were similar between the two groups. NVP-resistance mutations did differ by timing of HIV infection; the Y181C variant was predominant among infants diagnosed in the first six weeks of life, compared to Y188C/H during late breast-milk transmission. Conclusions/Significance Use of SWEN to prevent breast-milk HIV transmission carries a high likelihood of resistance if infection occurs in the first six weeks of life. Moreover, there was a continued risk of transmission of NVP-resistant HIV through breastfeeding during the first year of life, but did not differ between SD-NVP and SWEN groups. As with SD-NVP, the value of preventing HIV infection in a large number of infants should be considered alongside the high risk of resistance associated with extended NVP prophylaxis. Trial Registration ClinicalTrials.gov NCT00061321

Comparison of visual inspection with acetic acid and cervical cytology to detect high-grade cervical neoplasia among HIV-infected women in India.

Human immunodeficiency virus (HIV)‐infected women in India and other developing country settings are living longer on antiretroviral therapy, yet their risk for human papillomavirus (HPV)‐induced cervical cancer remains unabated because of lack of cost‐effective and accurate secondary prevention methods. Visual inspection after application of dilute acetic acid on the cervix (VIA) has not been adequately studied against the current standard: conventional cervical cytology (Pap smears) among HIV‐infected women. We evaluated 303 nonpregnant HIV‐infected women in Pune, India, by simultaneous and independent screening with VIA and cervical cytology with disease ascertainment by colposcopy and histopathology. At the cervical intraepithelial neoplasia (CIN2+) disease threshold, the sensitivity, specificity and positive and negative predictive value estimates of VIA were 80, 82.6, 47.6 and 95.4% respectively, compared to 60.5, 59.6, 22.4 and 88.7% for the atypical squamous cells of undetermined significance or severe (ASCUS+) cutoff on cytology, 60.5, 64.6, 24.8 and 89.4% for the low‐grade squamous intraepithelial cells or severe (LSIL+) cutoff on cytology and 20.9, 96.0, 50.0 and 86.3% for high‐grade squamous intraepithelial lesion or severe (HSIL+) cutoff on cytology. A similar pattern of results was found for women with the presence of carcinogenic HPV‐positive CIN2+ disease, as well as for women with CD4+ cell counts <200 and <350 μL−1. Overall, VIA performed better than cytology in this study with biologically rigorous endpoints and without verification bias, suggesting that VIA is a practical and useful alternative or adjunctive screening test for HIV‐infected women. Implementing VIA‐based screening within HIV/acquired immunodeficiency syndrome care programs may provide an easy and practical means of complementing the highly anticipated low‐cost HPV‐based rapid screening tests in the near future, thereby contributing to improve program effectiveness of screening.

Symptom Screening Among HIV-Infected Pregnant Women Is Acceptable and Has High Negative Predictive Value for Active Tuberculosis

We evaluated tuberculosis (TB) screening among 799 human immunodeficiency virus (HIV)-infected pregnant women in India. Eleven (1.4%) had active TB. The negative predictive value of screening using cough, fever, night sweats, or weight loss was 99.3%. Tuberculin skin test and targeted chest radiography provided no substantial benefit. TB symptom screening, as recommended by the World Health Organization, is effective for ruling out TB in HIV-infected pregnant women.

Prevalence and Predictors of Colposcopic-Histopathologically Confirmed Cervical Intraepithelial Neoplasia in HIV-Infected Women in India

Background Prevalence estimates of cervical intraepithelial neoplasia (CIN) among HIV-infected women in India have been based on cervical cytology, which may have underestimated true disease burden. We sought to better establish prevalence estimates and evaluate risk factors of CIN among HIV-infected women in Pune, India using colposcopy and histopathology as diagnostic tools. Methodology Previously unscreened, non-pregnant HIV-infected women underwent cervical cancer screening evaluation including standardized diagnostic colposcopy by a gynecologist. Histopathologic confirmation was conducted among consenting women with clinical suspicion of CIN. The prevalence of CIN was evaluated by a composite diagnosis based on colposcopy and histopathology results. Multivariable ordinal logistic regression analysis was conducted to determine independent predictors of increasing severity of CIN. Results The median age of the n = 303 enrolled HIV-infected women was 30 years (interquartile range, 27–34). A majority of the participants were widowed or separated (187/303, 61.7%), more than one-third (114/302, 37.7%) were not educated beyond primary school, and nearly two-thirds (196/301, 64.7%) had a family per capita income of <1,000 Indian Rupees (∼US

Repeated pregnancy among women with known HIV status in Pune, India

22) per month. Cervical high-risk HPV-DNA was detected in 41.7% (124/297) of participants. The composite colposcopic-histopathologic diagnoses revealed no evidence of CIN in 220 out of 303 (72.6%) women, CIN1 in 33/303 (10.9%), CIN2 in 31/303 (10.2%), CIN3 in 18/303 (5.9%) and 1 (0.3%) woman was diagnosed with ICC. Thus, over a quarter of the participants [83/303: 27.7% (95% CI: 22.7–33.1)] had ≥CIN1 lesions and a sixth [50/303: 16.5% (95% CI: 12.2–21.9)] had evidence of advanced (≥CIN2) neoplastic disease. The independent predictors of increasing severity of CIN as revealed by a proportional odds model using multivariable ordinal logistic regression included (i) currently receiving antiretroviral therapy [adjusted odds ratios (aOR): 2.24 (1.17, 4.26), p = 0.01] and (ii) presence of cervical high-risk HPV-DNA [aOR: 1.93 (1.13, 3.28), p = 0.02]. Conclusions HIV-infected women in Pune, India have a substantial burden of cervical precancerous lesions, which may progress to invasive cervical cancer unless appropriately detected and treated. Increased attention should focus on recognizing and addressing this entirely preventable cancer among HIV-infected women, especially in the context of increasing longevity due to antiretroviral therapy.

Low sensitivity of total lymphocyte count as a surrogate marker to identify antepartum and postpartum Indian women who require antiretroviral therapy.

Abstract HIV-positive women of reproductive age face challenges in decision making related to pregnancy. Understanding factors influencing repeat pregnancies in women with known HIV status are necessary to guide interventions and counseling strategies to better inform and support them. We compared three groups of women attending a large antenatal clinic in Pune, India. They include: Group A – 63 HIV-positive women comingfor care for a repeat pregnancy after being diagnosed in a previous pregnancy; Group B – 64 HIV-negative (repeat) pregnant women attendingthis antenatal clinic; and Group C – 63 HIV-positive non-pregnant women currently enrolled in an ongoing clinical trial. Comparisons of Group A and B indicate that the likelihood of unplanned repeat pregnancies was significantly higher in HIV-positive (70%) than HIV-negative (36%) women (OR=4.1, CI: 2.0–8.7). Inability to terminate the pregnancy (31%) and familial obligations (40%) appear to be important for continuing the unplanned repeat pregnancy. Despite high reported contraceptive use by HIV-positive women, pregnancies still occurred. Death of their youngest child is an important factor as 21% of HIV-positive pregnant women lost their youngest child compared with 3% of HIV-negative women and 3% of HIV-positive non-pregnant women (p<0.001). Repeat pregnancies were more likely to occur for women who did not disclose their HIV status to their spouse. Thus the majority of the repeat pregnancies for HIV-positive women were both unplanned and unwanted.

Declining HIV infection rates among recently married primigravid women in Pune, India

Background: Some studies support the use of total lymphocyte count (TLC) as a surrogate marker for CD4 cell count to guide antiretroviral therapy (ART) initiation. However, most of these studies have focused on nonpregnant adults. In light of expanding ART access through prevention of mother-to-child transmission (PMTCT)-plus programs in resource-limited settings, we assessed the sensitivity, specificity, and positive predictive value (PPV) of TLC for predicting low CD4 counts in antepartum and postpartum women in Pune, India. Methods: CD4, TLC, and hemoglobin were measured at third trimester, delivery, and 6, 9, and 12 months postpartum (PP) in a cohort of 779 HIV-infected women. Optimal TLC cutoff for predicting CD4 <200 cells/mm3 was determined via logistic regression where sensitivity, specificity, PPV, and an area under the receiver operating characteristic (ROC) curve were calculated. Results: Among the 779 women enrolled, 16% had WHO clinical stage 2 or higher and 7.9% had CD4 <200 cells/mm3. Using 2689 TLC-CD4 pairs, the sensitivity, specificity, and PPV of TLC <1200 cells/mm3 for predicting CD4 <200 cells/mm3 was 59%, 94%, and 47%, respectively. The sensitivity of TLC <1200 cells/mm3 cutoff ranged between 57% and 62% for time points evaluated. Addition of hemoglobin <12 g/dL or <11 g/dL increased the sensitivity of TLC to 74% to 92% for predicting CD4 <200 cells/mm3 but decreased the specificity to 33% to 69% compared to TLC alone. A combination of TLC, hemoglobin, and WHO clinical staging had the highest sensitivity but lowest specificity compared to other possible combinations or use of TLC alone. The sensitivity and specificity of TLC <1200 cells/mm3 to predict a CD4 <350 cells/mm3 was 31% and 99%, respectively. Conclusions: Our data suggest that antepartum and PP women with TLC <1200 cells/mm3 are likely to have CD4 <200 cells/mm3. However, the sensitivity of this TLC cutoff was low. Between 45% and 64% of antepartum and PP women requiring initiation of ART may not be identified by using TLC alone as a surrogate marker for CD4 <200 cells/mm3. The WHO-recommended TLC cutoff of <1200 cells/mm3 is not optimal for identifying antepartum and PP Indian women who require ART.

Impact of maternal human immunodeficiency virus infection on pregnancy and birth outcomes in Pune, India

Background:A single recent study has suggested a decrease in HIV risk for women attending antenatal clinics (ANCs) in southern India. Yet, some have questioned the validity of the Indian national surveillance data and analyses. Previous studies suggest that the only major HIV risk factor for married Indian women is the risk behavior of their husbands. Therefore, to address concerns about potential selection bias in the analysis of sentinel surveillance data from multiple sites, we estimated the trajectory of HIV transmission rates among recently married, monogamous, primigravid women attending a single large ANC in Pune, India. Methods:Participants were self-referred, young, primigravid women from 18 to 27 years of age consenting to HIV screening. Time trends in HIV prevalence over 3.5 years were evaluated by logistic regression adjusted for age. HIV incidence was estimated by dividing the number of HIV-infected mothers by an estimate of exposure person-time, which was an estimate of the average age-specific duration of marriage. Results:Between August 16, 2002 and February 28, 2006, 30,085 (79.5%) of 37,858 pregnant women consented to HIV screening; 10,982 (36.5%) were primigravid and their age range was from 18 to 27 years. HIV infection risk declined over 3.5 years among primigravid women. An estimated 19,739 person-years (PYs) of exposure yielded an overall HIV incidence rate 1.25/100 PYs (95% confidence interval [CI]: 1.10 to 1.42). Estimated HIV incidence decreased from 2.2/100 PYs (95% CI: 1.6 to 3.0) in 2002 to 2003 to 0.73/100 PYs (95% CI: 0.5 to 1.0) in 2006. Discussion:HIV infection risk among young primigravid women in Pune seems to have decreased over the past 3.5 years. A decreasing HIV risk among pregnant women in Pune would also decrease the number of HIV-exposed infants. We hypothesize that decreased high-risk sexual behavior among young recently married men is most likely contributing to a decreasing risk to their wives and children in Pune.