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3 Cards in this Set
- Front
- Back
Which of the following mycobacterium spp. is a yellow pigment producer when exposed to light?
A. Xenophi B. Gordonae C. Fortuitum D. Avium-intracellulare E. Marinum |
E. M. Marinum is a photochromagen (Runyon group I).
Xenophi - Group III - non-photochromagen Fortuitum- Group IV - Rapid grower Avium-intracellulare - Group III Gordonae - Group II - Scotochromogen |
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This LJ medium shows organism before and after light exposure, name the organism?
A. M. Kansasii B. M. Scrofulaceum C. M. Haemophilium D. M. Chelonei E. MAI |
A. M. Kansasii, M. Marinum and M. simiae are the main photochromogens. M szulgai is a photo chromogen only at 22 degrees. Scrofulaceum = Runyon 2, Haemophilium = Runyon 3, Chelonei = Runyon 4, MAI = Runyon 3
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Mycobacterium that grows in 6 days and is nitrate reductase positive?
A. M. Fortuitum B. M. Chelonei C. M. Tuberculosis D. M. Marinum |
M. Fortuitum and M. Chelonei are both Rapid growers. M. Fortuitum is nitrate test positive while M. Chelonei is nitrate test negative.
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