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Articles » Mycobacterium avium Complex: DBMD
 

Mycobacterium avium Complex: DBMD

Article title: Mycobacterium avium Complex: DBMD

Conditions: Mycobacterium avium Complex

Source: DBMD



Mycobacterium avium Complex

   
Clinical Features Several different syndromes are caused by Mycobacterium avium complex (MAC). Disseminated infections are usually associated with HIV infection. Less commonly, pulmonary disease in nonimmunocompromised persons is a result of infection with MAC. In children, the most common syndrome is cervical lymphadenitis.
Etiologic Agent Mycobacterium avium complex (comprising M. avium and M.intracellulare).
Incidence Not reportable. Population-based data available for Houston and Atlanta metropolitan areas suggest a rate of 1/100,000/year. Incidence is decreasing among HIV- infected patients as a result of new treatment modalities e.g., combination therapy with nucleoside reverse transcriptase inhibitors and protease inhibitors, as well as antimycobacterial prophylaxis.
Sequelae In HIV infected persons, manifestations include night sweats, weight loss, abdominal pain, fatigue, diarrhea, and anemia.
Transmission Although the mode of transmission is unclear, MAC is most likely environmentally acquired.
Risk Groups HIV-infected persons. Rarely in children or nonimmuno-compromised persons.
Surveillance MAC is not nationally reportable. Currently under active surveillance in the Houston and Atlanta metropolitan areas.
Trends Incidence is decreasing because of changes in treatment for HIV-infected patients; however, antimicrobial resistance may be increasing.
Challenges Antimicrobial resistance and better treatment for affected persons. Unclear knowledge of acquisition of MAC from the environment.
Opportunities Reduction in MAC infection as a significant cause of morbidity and mortality in HIV-infected patients as a result of changes in available therapies.

December 2001

 
 
 

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