Full 2L QBank
Microbiology General 9a4be58d

After 3 days of a road traffic accident, a wound shows crepitation in the subcutaneous tissue and muscle with foul-smelling discharge. Pus culture shows Cl. perfringens. All of the following features about Cl. perfringens are TRUE, EXCEPT:

A
It is the most common cause of gas gangrene
B
Can be detected by Nagler's reaction
C
The most impoant toxin is hyaluronidase
D
Gas gangrene strains produce heat resistant spores
High-Yield Explanation
All types of C perfringens produce the alpha toxin, a necrotizing, hemolytic exotoxin that is a lecithinase. Hemolysis and gas production are characteristic. Lecithinase activity is evaluated by the precipitate formed around colonies on egg yolk media (Nagler's reaction). Gas Gangrene producing strains of Cl. Perfringens produce heat resistant spores. Also know: Gases formed in gas gangrene are hydrogen and carbon dioxide gas. Ref: Ray C.G., Ryan K.J. (2010). Chapter 29. Clostridium, Peptostreptococcus, Bacteroides, and Other Anaerobes. In C.G. Ray, K.J. Ryan (Eds), Sherris Medical Microbiology, 5e.

Related Microbiology MCQs

Practice 2,00,000+ NEET PG Questions Free

Timed mock tests, mistake queue analytics, audio lectures & zero attempt limits on i❤️Exams.

Start Free Mock Test Now