CAMP-disk test for presumptive identification of group B streptococci

Publisher Website
Google Scholar
Abstract
The moldification of the CAMP [Christie, Atkins, Munch-Peterson] 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.degree. 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 for streptococcal convenient way to identify presumptively group B streptococci.