Enhancement of cell-associated HIV-1 infection by breast milk.

<p>Breast milk from HIV-positive and HIV-negative donors was evaluated for activity against cell-associated HIV-1 infection in TZM-bl cell assays. Breast milk was tested at 5-fold serial dilutions (1∶4, 1∶20, 1∶100 and 1∶500). Percent inhibition or enhancement of cell-associated R5 HIV-1_BAL is shown for breast milk samples from individual HIV-positive (open circles) and HIV-negative (closed circles) donors.