Temporal and lateral dynamics of HIV shedding and elevated sodium in breast milk among HIV-positive mothers during the first 4 months of breast-feeding

• Published in: Journal of acquired immune deficiency syndromes (1999) Vol. 47; no. 3; p. 320
• Main Authors: Semrau, Katherine, Ghosh, Mrinal, Kankasa, Chipepo, Sinkala, Moses, Kasonde, Prisca, Mwiya, Mwiya, Thea, Donald M, Kuhn, Louise, Aldrovandi, Grace M
• Format: Journal Article
• Language: English
• Published: United States 01.03.2008
• Subjects: Breast Feeding; CD4 Lymphocyte Count; Female; HIV Infections - blood; HIV Infections - prevention & control; HIV Infections - transmission; HIV-1 - genetics; Humans; Infant; Infant, Newborn; Infectious Disease Transmission, Vertical - prevention & control; Milk, Human - virology; Nevirapine - therapeutic use; Polymerase Chain Reaction - methods; Pregnancy; Pregnancy Complications, Infectious - prevention & control; Pregnancy Complications, Infectious - virology; RNA, Viral - blood; RNA, Viral - genetics; Sodium - blood; Time Factors; Viral Load
• ISSN: 1525-4135
• DOI: 10.1097/QAI.0b013e31815e7436

To better understand the dynamics of breast milk HIV shedding and its relation to postnatal HIV transmission, we investigated the temporal and lateral relations of breast milk viral shedding and sodium concentrations in HIV-positive women. This was a longitudinal cohort study in Lusaka, Zambia. We examined patterns of HIV shedding in breast milk over the first 4 months of breast-feeding and their correlations with postnatal HIV transmission among 138 breast-feeding mothers. Sodium concentration in breast milk was also examined in the same samples and in breast milk from 23 HIV-negative controls. Higher breast milk viral load at 1 week, 1 month, and 4 months and consistent viral shedding in breast milk were significantly associated with increased risk of HIV transmission. Elevated breast milk sodium concentration (> or =13 mmol/L) at 4 months was associated with HIV transmission, low maternal CD4 cell count, and high maternal plasma viral load. Elevated sodium concentration at 1 week postpartum was common and was not associated with any of these parameters. Consistent viral shedding and high breast milk viral load are strong predictors of mother-to-child HIV transmission. Although sodium concentrations later in breast-feeding correlate with breast milk viral load, increased breast milk sodium is normal in early lactation and does not predict HIV transmission.