Serum vitamin A levels during tuberculosis and human immunodeficiency virus infection.

Vitamin A deficiency during tuberculosis and human immunodeficiency virus (HIV) infection has not been characterized. A cross-sectional study was conducted among HIV-infected adults with tuberculosis in Butare, Rwanda, in which 29% of the subjects had serum vitamin A levels consistent with deficiency (<1.05 micromol/L). Women had mean serum vitamin A levels of 1.22+/-0.45, compared with 1.47+/-0.68 in men (P < 0.07). A total of 37% of subjects with recent weight loss had vitamin A levels consistent with deficiency, compared with 14% of subjects without weight loss (P < 0.02). This study suggests that vitamin A deficiency is common among adults with tuberculosis and HIV infection in Rwanda.