Abstract
In 1985, the first report of presumed HIV breast milk transmission was described in an Australian infant whose mother received a postpartum transfusion from an apparently healthy male homosexual donor, who subsequently developed Kaposi’s sarcoma and Pneumocystis pneumonia [1]. Later that year, HIV was cultured from the cell-free fraction of breast milk of 3 HIV-infected women [2]. On the basis of these reports, guidelines in the USA were changed advising HIV-infected women not to breastfeed, but for the majority of HIV-infected women worldwide this was not and is not an option. In the intervening 25 years, much has been learned about breast milk transmission, including ways to reduce its occurrence. Some of this knowledge may appear “obvious”; e.g., avoidance of breast feeding prevents breast milk transmission [3]. Less obvious is the fact that breastfeeding behavior, i.e., exclusive breastfeeding, as opposed to mixed feeding, substantially reduces the risk of transmission [4]. However, despite these advances, there are still many questions regarding key pathogenic mechanisms of HIV breast milk transmission. Among these are whether cell-free or cell-associated virus is responsible for transmission; where and when transmission occurs; which virologic determinants predispose mother–infant pairs to transmission; and whether the breast is a separate virologic compartment? This chapter reviews the virologic factors that have been associated with breast milk transmission of HIV.
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Fiscus, S.A., Aldrovandi, G.M. (2012). Virologic Determinants of Breast Milk Transmission of HIV-1. In: Kourtis, A., Bulterys, M. (eds) Human Immunodeficiency Virus type 1 (HIV-1) and Breastfeeding. Advances in Experimental Medicine and Biology, vol 743. Springer, New York, NY. https://doi.org/10.1007/978-1-4614-2251-8_5
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