[Evaluation of the control measures adopted against an epidemic of AIDS-related multidrug-resistant tuberculosis in a Latin-American hospital]. / Evaluación de las medidas de control adoptadas frente a la epidemia de tuberculosis multirresistente asociada al sida en un hospital hispanoamericano.

BACKGROUND: Since 1992 AIDS-related multidrug-resistant tuberculosis (MDRTB) has been detected among patients admitted to the Hospital Muñiz in Buenos Aires (Argentina). The aim of the present study was to evaluate the effectiveness of the control measures adopted against the nosocomial spread of MDRTB/AIDS, which affected 803 patients between 1992 and 2002. METHODS: An action plan was applied that included bacilloscopy screening on admission, isolation rooms for patients with TB/AIDS, an isolation ward for patients with MDRTB/AIDS, a radiometric method for the diagnosis of multidrug-resistance, a reserve supply of second line drugs, and respiratory protection for health care workers. RESULTS: Between 1995 and 2002, a statistically significant decreasing trend in cases of MDRTB/AIDS and admissions for TB/AIDS was observed (33.9% vs 80.5%). Mortality among patients with MDRTB/AIDS also significantly decreased. Bacilloscopy screening allowed the diagnosis of 63.4% of patients admitted with TB/AIDS. Respiratory isolation facilities and effective treatment of patients with MDRTB diagnosed through the radiometric method were progressively implemented. Admission of patients with AIDS showed no significant variations throughout the study period. The CD41 count of patients requiring admission did not vary significantly. CONCLUSION: The nosocomial epidemic curve of MDRTB in patients with AIDS significantly decreased, despite the persistence of susceptible patients with low CD41 levels. The decreasing tendency of MDRTB/AIDS cases could be attributed to the impact of the control measures implemented.

Mejoria pronóstica de pacientes con tuberculosis multirresistente asociada a enfermedad por HIV/SIDA tratados con terapia antirretroviral de alta eficacia / Improved prognosis in HIV/AIDS related multi-drug resistant tuberculosis patients treated with highly active antiretroviral therapy

A prospective cohort study was carried out in patients assisted in the F. J. Muniz Infectious Disease Hospital, with the aim of determining the effectiveness of highly active antiretroviral therapy (HAART) implemented as soon as the sputum smear microscopy became negative (1 to 3 months) in the survival improvement of HIV/AIDS related multidrug-resistant tuberculosis patients. The cohort was recruited from June 1997 to February 1999 and compared with a pre-HAART control group that consisted of 43 patients. The follow-up of the patients was terminated June 2000. A total of 48 patients who received HAART precociously were included. The mortality rate in this group was 31.2 per cent and the survival time of deceased patients 15.8 +/- 8.5 months. The T lymphocytes CD4+ count was initially 40.1 +/- 30.2/microL, while at the end of the observation period it was 140.4 +/- 73.04/microL and 79.1 per cent of these patients presented undetectable viral load. In the control group the overall mortality was 90.7 per cent and the survival time of deceased patients 8.95 +/- 3.72 months. We conclude that the early anti-retroviral therapy, together with the treatment of the multidrug-resistant tuberculosis and of other AIDS associated diseases represent a useful approach to achieve a longer and better survival in these severely immunodepressed patients.