Objective: To determine the clinical and epidemiological characteristics of prison inmates with active tuberculosis in HIV-positive prison populations.
Materials and methods: We conducted a cohort study in HIV-infected subjects in a prison in Mexico City, with the aim of determining clinical and epidemiological characteristics of cases with active TB.
Results: We detected 172 HIV infected inmates and TB in 28 of them (16.3%) - 21 (12.2) with pulmonary TB--with an incidence rate of 7.7/100 persons/year for active TB and 4.7/100 persons/year for pulmonary TB. No drug resistance was found. Two clusters (4 and 2 subjects) were observed after RFLP-typing of 18 isolates, with a transmission rate of 11% by molecular and clinical analysis.
Conclusions: The prevalence of active TB was found to be a thousand times greater than in the general population. Evidence of transmission inside the prison was also found.