Discussion :: Streptococcus - Section 1 (Q.No.2)
Which of the following test indicates the susceptibility to streptococcal pyrogenic exotoxin?
Answer: Option B
No answer description available for this question.
|Madusanka said: (May 11, 2015)|
|The modification of the CAMP test for group B streptococci involved substituting a paper disk impregnated with partially purified beta-hemolysin for the staphylococcal culture that was the source of beta-hemolysin in the original test. The disk is placed onto a sheep blood agar plate beside the streak of Streptococcus being tested. The plate is then incubated aerobically at 35 degrees C.
A positive reaction consists of a lunar-shaped clear zone that appears within 24 h in the dark beta-hemolysin zone surrounding the disk. A double-blind study of 135 randomly coded streptococcal isolates showed complete agreement between the CAMP-disk test and the standard Lancefield precipitin test.
All group B streptococci tested had positive reactions, and all strains tested from streptococcal groups A, C, D, and G were negative. The CAMP-disk test is a simple and convenient way to identify presumptively group B streptococci.
Post your comments here:
Email : (optional)
» Your comments will be displayed only after manual approval.