Higher prevalence of tuberculosis (n = 21/71, 29.58%), diarrhea (n = 4/71, 5.63%), oral candidiasis (n = 16/71, 22.53%), skin fungal infections (n = 4/71, 5.63%), pneumonia (n = 3/71, 4.22%) and others (n = 4/71, 5.63%) were found in patients with CD4 count less than 200/mm3. This evidence concerns the gene CD4 and susceptibility to pneumonia measurement.