Microbiology 10 (Mycobacteria) Flashcards
(24 cards)
Broad bacilli with cross-banding
M. marinum
Bacilli with shepherds crook
M. kansasii
Presumptive MTB
Acid fast with cording or
NAP sensitive
Rapid growers (<7 days)
M. fortuitum (arylsulf +, nitrate +)
M. chelonae (arylsulf +, nitrate -)
M. smegmatis
M. abscessus
Photochromogens
M. kansasii
M. simiae
M. marinum
M. asiaticum
Scotochromogens
M. scrofulaceum
M. gordonae
M. flavescens
M szulgai
scotochromogen at 37
photochromogen at 22
diff MTB from MAI or M. bovis by naicin
MTB niacin +
MAI, M. bovis niacin -
MTB characteristics
NAP+, cording + niacin + ruff buff colonies catalase -
M. scrofulaceum
cervical lymphadenopathy in children
M. kansaii
pulmonary dz with underlying pneumoconiosis
Buruli ulcer
M. ulcerans
Lepromatous leprosy
skin
lots of AFB in foamy histiocytes
Strongyloides superinfection
Tuberculoid leprosy
noncaseating granulomas
very few AFB
katG
inhA
Genes for isoniazid resistance
rpoB
Gene for rifampin resistance
pncA
Gene for pyrazinamide resistance
rpsL, S12 ribosomal protein
rrs 16S ribosomal RNA
Genes for streptomycin resistance
Runyoun classification
I: photochromogen
II: scotochromogen
III: non-chromogen
IV: rapid growers
Examples of Runyoun I
Kansasii
Marinum
Asiaticum
Simiae
Examples of Runyoun II
Scrofulaceum
Gordonae
Flavescens
Examples of Runyoun III
Avium-Intracellulare
Xenopi
Terrae
Examples of Runyoun IV
Fortuitum
Abscessus
Chelonae
Peregrinum
Assd with strongyloides infection
Lepromatous leprosy
