Dietary zinc supplementation in HIV-1 transgenic rats increases the bacterial phagocytic capacity of alveolar macrophages. The bacterial phagocytic capacity (as reflected by phagocytic indices) of alveolar macrophages from wild type and HIV-1 transgenic rats were determined by flow cytometry as described in Materials and Methods. Each value represents the mean ± SEM of 4-6 rats in each group. *p < 0.05 decreased compared to untreated wild type rats. **p < 0.05 increased compared to untreated HIV-1 transgenic rats.