Atypical Mycobacterial Infections



Atypical Mycobacterial Infections


Cary Chisholm, MD










Atypical mycobacterial infection over the dorsal hand presented as an indurated pink nodule image in this patient. The culture was positive for Mycobacterium marinum.






Some atypical mycobacterial infections have a diffuse mixed inflammatory infiltrate with associated necrosis. (Courtesy S. Billings, MD.)


TERMINOLOGY


Definitions



  • Infections with Mycobacterium spp. other than M. leprae and M. tuberculosis


CLINICAL ISSUES


Epidemiology



  • Age



    • Affects any age group


  • Gender



    • No gender predilection


  • Ethnicity



    • No specific ethnic predilection



      • More common in developing countries and immunosuppressed


Site



  • Can occur anywhere after bacterial contamination


Presentation



  • Tender nodules, abscesses, plaques, or ulcers



    • May be solitary or multiple


    • May be superficial, deep, or both


  • Erythema

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Jul 8, 2016 | Posted by in PATHOLOGY & LABORATORY MEDICINE | Comments Off on Atypical Mycobacterial Infections
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