Atypical Mycobacteria Flashcards
What are the two photochromogens mycobacteria?
M. kansasii
M. marinum
Where is M. kansasii found and what does it cause?
In midwest, texas and england
Produces pulmonary/systemic dz most closely resembling TB and is killed by the same antibiotics
Where is M. marinum found and what does it cause?
Found in fresh and salt water
Forms “fish-tank” granulomatous, ulcerating lesions on abrasions exposed to swimming water or aquariums
Tx with tetracycline
What Mycobacteria is responsible for scrofula seen in children?
Scrofulaceum
Where is scrofulaceum found?
reservoir is in water
What are the 2 nonchromogen mycobacteria?
M. avium
M. intracellulare
What is unique about M. avium and M. intracellulare?
They are very difficult to distinguish and cause pulmonary dz that is indistinguishable from TB in severely immunocompromised pts
Also very drug resistant
Where are the nonchromogens M. avium and M. intracellulare found?
Found in the soil and water
What are the 4 rapidly growing mycobacteria that can be cultured in
M. fortuitum
M. chelonei
M. Abscessus
M. smegmatis
Where are M. fortuitum and M. chelonei found and when do they cause problems?
Found in the soil and water
Cause problems in immunocompromised, prosthetic hips, indwelling catheters, and puncture wounds
Where is M. smegmatis found?
Normal flora under foreskin
