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Mycobacterium avium complex

Last reviewed: 24 Jan 2026
Last updated: 03 Apr 2025

Summary

Definition

History and exam

Key diagnostic factors

  • underlying lung disease
  • chronic productive cough
  • dyspnea
  • weight loss
  • fatigue
  • fever
  • lymphadenopathy
  • immunocompromised
  • hot tub use
Full details

Other diagnostic factors

  • age under 5 years
  • middle-to-old age
  • night sweats
  • abdominal pain
  • diarrhea
  • rhonchi/crackles
  • hepatomegaly
  • splenomegaly
  • thin body habitus
  • pectus excavatum
  • scoliosis
  • systolic click and murmur
Full details

Risk factors

  • underlying lung diseases
  • smoking
  • excessive alcohol use
  • increasing age
  • hot tub use
  • HIV/AIDS
  • severe immunosuppression
  • genetic cytokine defects
Full details

Diagnostic tests

1st tests to order

  • CBC with differential
  • LFT
  • chest x-ray
  • sputum culture
  • blood culture
Full details

Tests to consider

  • high-resolution CT (HRCT) scanning
  • bone marrow aspirate for culture
  • bronchoscopy/bronchial lavage
  • lung biopsy
  • lymph node biopsy
Full details

Emerging tests

  • polymerase chain reaction

Treatment algorithm

ONGOING

pulmonary MAC

disseminated MAC

MAC lymphadenitis

MAC hypersensitivity pneumonitis

Contributors

Authors

Zelalem Temesgen, MD, FIDSA
Zelalem Temesgen

Professor of Medicine

Director, Mayo Clinic Center for Tuberculosis

Director, HIV Program

Consultant, Division of Infectious Diseases

Mayo Clinic

Rochester

MN

Divulgaciones

ZT declares that he has no competing interests.

Agradecimientos

Dr Temesgen would like to gratefully acknowledge Dr Dereje S. Ayo, a previous contributor to this topic.

Divulgaciones

DSA declares that he has no competing interests.

Revisores por pares

Jonathan P. Parsons, MD

Assistant Professor

Division of Pulmonary, Allergy, Critical Care and Sleep Medicine

Ohio State University Medical Center

Columbus

OH

Divulgaciones

JPP declares that he has no competing interests.

Sandro Vento, MD

Director

Infectious Diseases Unit

Annunziata Hospital

Cosenza

Italy

Divulgaciones

SV declares that he has no competing interests.

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Referencias

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Artículos principales

National Institutes of Health, Centers for Disease Control and Prevention, HIV Medicine Association, and Infectious Diseases Society of America. Panel on Guidelines for the Prevention and Treatment of Opportunistic Infections in Adults and Adolescents with HIV. Guidelines for the prevention and treatment of opportunistic infections in adults and adolescents with HIV: Disseminated mycobacterium avium complex disease. 2024 [internet publication].Texto completo

Griffith DE, Aksamit T, Brown-Elliott BA, et al. An official ATS/IDSA statement: diagnosis, treatment, and prevention of nontuberculous mycobacterial diseases. Am J Respir Crit Care Med. 2007 Feb 15;175(4):367-416.Texto completo  Resumen

Daley CL, Iaccarino JM, Lange C, et al. Treatment of nontuberculous mycobacterial pulmonary disease: an official ATS/ERS/ESCMID/IDSA clinical practice guideline. Clin Infect Dis. 2020 Aug 14;71(4):e1-36.Texto completo  Resumen

Haworth CS, Banks J, Capstick T, et al. British Thoracic Society guidelines for the management of non-tuberculous mycobacterial pulmonary disease (NTM-PD). Thorax. 2017 Nov;72(suppl 2):ii1-64.Texto completo

Artículos de referencia

Una lista completa de las fuentes a las que se hace referencia en este tema está disponible para los usuarios con acceso a todo BMJ Best Practice.
  • Diferenciales

    • Pulmonary tuberculosis
    • Other nontuberculous mycobacteria (NTM)
    • HIV-related lymphoma
    Más Diferenciales
  • Guías de práctica clínica

    • Guidelines for the prevention and treatment of opportunistic infections in adults and adolescents with HIV
    • Guidelines for the prevention and treatment of opportunistic infections in children with and exposed to HIV
    Más Guías de práctica clínica
  • Folletos para el paciente

    Quitting smoking

    Más Folletos para el paciente
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