Microbiology - Streptococcus - Discussion
Discussion Forum : Streptococcus - Section 1 (Q.No. 2)
2.
Which of the following test indicates the susceptibility to streptococcal pyrogenic exotoxin?
Discussion:
3 comments Page 1 of 1.
Ramis said:
5 years ago
Aso test should be the right one, as its name indicates antistreptolysin oxygen labile.
(1)
Ami Patel said:
6 years ago
What about ASO test?
(1)
Madusanka said:
1 decade ago
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.
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.
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