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Disseminated disease due to Mycobacterium avium complex in AIDS

P J Flegg1, R B Laing, C Lee

  • 1Regional Infectious Diseases Unit, City Hospital, Edinburgh, UK.

QJM : Monthly Journal of the Association of Physicians
|September 1, 1995
PubMed

Insights

Disseminated Mycobacterium avium complex (MAC) infection is common in advanced HIV/AIDS, causing significant illness. However, it may not impact overall survival, suggesting surveillance and early diagnosis could be alternatives to prophylaxis.

Area of Science:

  • Infectious Diseases
  • HIV/AIDS Research
  • Clinical Epidemiology

Background:

  • Mycobacterium avium complex (MAC) disseminated infections are a significant opportunistic infection in patients with advanced HIV.
  • Understanding the clinical presentation, incidence, and impact on survival of disseminated MAC in HIV-infected individuals is crucial for patient management.

Purpose of the Study:

  • To retrospectively analyze the incidence, clinical features, and survival outcomes of disseminated Mycobacterium avium complex (MAC) infection in a cohort of HIV-infected patients.
  • To compare clinical characteristics and survival between HIV patients with disseminated MAC and matched controls without disseminated MAC.
  • To evaluate the impact of disseminated MAC on overall survival in the context of AIDS and explore potential management strategies.

Main Methods:

  • Retrospective analysis of 702 HIV-infected patients, with a focus on 46 cases of disseminated MAC.
  • Case-matched control study comparing patients with disseminated MAC to AIDS cases without disseminated MAC.
  • Statistical analysis to control for confounding variables influencing survival and to compare incidence and survival times.

Main Results:

  • Disseminated MAC was diagnosed antemortem in 18% of AIDS patients and was the AIDS-defining diagnosis in 6%.
  • Patients with disseminated MAC presented with lower CD4+ counts (<10 cells/mm3), weight loss, anemia, leucopenia, and elevated liver enzymes.
  • Median survival after disseminated MAC diagnosis was 6 months, but overall survival from AIDS diagnosis was not significantly different between those who did and did not develop disseminated MAC.

Conclusions:

  • Disseminated MAC significantly contributes to morbidity in AIDS patients and its incidence rises with prolonged AIDS survival.
  • While survival post-diagnosis is limited, disseminated MAC may not affect overall survival in AIDS patients.
  • In low-incidence settings, surveillance and early diagnosis might be a viable alternative to MAC prophylaxis.

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