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9229 Microbiology

In a completely and adequately immunized child against Diphtheria, the throat swab was collected. It showed the presence of Corynaebacterium diphtheriae like organisms on Albert staining. These orgainisms can have one of the following properties on further laboratory processing –

AIt can grow on Potassium tellurite medium
BIt would show a positive Elek's gel precipitation test
CIt can be pathogenic to experimental guinea pigs
DIt can produce cytotoxicity in tissue cultures
Microbiology
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