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Atypical mycobacterial infection - Overview

Alternative Names

Mycobacteria other than tuberculosis; Nontuberculous atypical mycobacterial disease

Definition of Atypical mycobacterial infection:

Atypical mycobacterial infection is an illness caused by a type of mycobacterium other than tuberculosis.

Causes, incidence, and risk factors:

Atypical mycobacteria can cause a wide variety of infections such as abscesses, septic arthritis, and osteomyelitis (bone infection). They can also infect the lungs, lymph nodes, gastrointestinal tract, skin, and soft tissues.

There are many different species of mycobacterium other than tuberculosis (Mycobacterium tuberculosis). Some of the most common are listed below:

  • Mycobacterium avium-intracellulare frequently affects AIDS patients and causes lung disease.
  • Mycobacterium marinum cause skin infections and is also responsible for swimming pool granuloma.
  • Mycobacterium ulcerans cause skin infections.
  • Mycobacterium kansasii causes lung disease.

The rate of atypical mycobacterial infections is rare, but it is increasing as the AIDS population grows. Populations at risk include individuals who have lung disease and weakened immune systems (immunosuppression).

  • Reviewed last on: 10/9/2006
  • D. Scott Smith, M.D., MSc, DTM&H, Chief of Infectious Disease & Geographic Medicine, Kaiser Redwood City, CA & Adjunct Assistant Professor, Stanford University. Review provided by VeriMed Healthcare Network.
The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed medical professional should be consulted for diagnosis and treatment of any and all medical conditions. Call 911 for all medical emergencies. Links to other sites are provided for information only -- they do not constitute endorsements of those other sites. © 1997- A.D.A.M., Inc. Any duplication or distribution of the information contained herein is strictly prohibited.
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