Which of the following stains positive with modified AFB stain?
Correct Answer: Cryptosporidium parvum
Description: Ans. c (Cryptosporidium parvum) (Ref. Ananthanarayan microbiology 6th ed. 371; Harsh Mohan Pathology 4th ed., 32)ACID FAST STAINING IS POSITIVE WITH-# Mycobacterium tuberculosis# Mycobacterium leprae# Nocardia# Cyclospora# Cryptosporidium parvum (Modified AFB stain)# Isospora (Modified AFB stain)# Bacterial spores# Lipofuschin pigment# Rodococcus equi- Lipofuschin is wear and tear lipid pigment in cells and can be stained by fat stains but differs from other lipids in being fluorescent and acid fast.- Acid fastness of tubercle bacillus is a scribed to the presence in the bacillus of an unsaponifiable wax (Mycolic add) or to a semi-permeable membrane around the cell. It is related to integrity of the cell and appears to be a property of lipid-rich waxy cell wall.
Category:
Microbiology
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