No statistically significant differences were found between the 2 groups in terms of TB prophylaxis, PCP, antiretroviral therapy, blood transfusion, mother-to-child transmission, addiction history, homosexuality, education, occupational exposure, and hepatitis B or hepatitis C virus infection, although people with male sex, a history of drug injection, TB, a history of shared injections, and a CD4 count ≤ 200/mm3 were more likely to be colonized (p<0.05). This evidence concerns the gene CD4 and hepatitis B virus infection.