Vitamin A status and therapy in childhood pulmonary tuberculosis.

Low plasma vitamin A levels (mean, 18.1 +/- 10.3 micrograms/dl, 62% below normal) were demonstrated in South African children with pulmonary tuberculosis.

Vitamin A status, other risk factors and acute respiratory infection morbidity in children.

Objective: This study evaluated the association between vitamin A status and the severity of acute respiratory infections (ARIs) in children, controlling for the influence of other known ARI risk factors.

Design: Case control study.

Setting: Ambulatory and hospital-based study.