Mycobacterium avium complex (MAC): an unusual potential pathogen in cerebrospinal fluid of AIDS patients

Area of Science:

• Infectious Diseases
• Neuroscience
• Immunology

Background:

• Mycobacterium avium complex (MAC) is a significant opportunistic infection in patients with Acquired Immunodeficiency Syndrome (AIDS).
• While MAC is frequently found in AIDS patients in North America and Europe, its isolation from the central nervous system (CNS) is rarely documented in these regions.
• MAC infections are generally considered uncommon in AIDS patients in African and Latin American countries.

Purpose of the Study:

• To report the isolation of MAC from cerebrospinal fluid (CSF) in a cohort of AIDS patients in São Paulo, Brazil.
• To discuss the clinical significance of MAC isolation from the CNS in this specific geographic context.
• To contribute to understanding the epidemiology of MAC CNS infections in resource-limited settings.

Main Methods:

• Retrospective analysis of patient data from "Centro de Referência e Treinamento-AIDS" in São Paulo.
• Identification of MAC in cerebrospinal fluid (CSF) samples from 1723 Human Immunodeficiency Virus (HIV)-positive patients.
• Clinical data review for patients with confirmed MAC CNS infection.

Main Results:

• MAC was isolated from the CSF of 11 out of 1723 (0.63%) AIDS patients.
• The isolation rate suggests MAC CNS involvement may be more prevalent than previously thought in certain Latin American regions.
• Detailed case information and outcomes for the 11 patients were analyzed.

Conclusions:

• The isolation of MAC from CSF in 0.63% of AIDS patients in São Paulo indicates a notable occurrence of CNS MAC infection.
• This finding challenges the perception of MAC CNS infections being uncommon in Latin America.
• Further research is warranted to elucidate the epidemiology and clinical impact of MAC CNS infections in AIDS patients in this region.