Mycobacterium fortuitum, Mycobacterium chelonae, and Mycobacterium abscessus are:

a. responsible for approximately 90% of clinical mycobacterial disease.
b. unable to grow on routine bacteriologic media.
c. gram-negative rods resembling Escheri-chia coli on Gram stain.
d. slow growers requiring a minimum of 14 days to grow.


A
M. fortuitum, M. chelonae, and M. abscessus are responsible for approximately 90% of clinical mycobacterial disease. They have the ability to grow on routine media, are weakly gram-positive rods that resemble diphtheroids on Gram stain, and are observed as visible colonies that appear on solid media in 7 days or less.

Biology & Microbiology

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