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CAMP test is shown at bottom left. The CAMP test (Christie–Atkins–Munch-Petersen) is a test to identify group B β-hemolytic streptococci (Streptococcus agalactiae) [1] [2] based on their formation of a substance, CAMP factor, [3] that enlarges the area of hemolysis formed by the β-hemolysin elaborated from Staphylococcus aureus.
[8] [9] The CAMP test is also another important test for identification of GBS. The CAMP factor produced by GBS acts synergistically with the staphylococcal β-hemolysin inducing enhanced hemolysis of sheep or bovine erythrocytes. [8] GBS is also able to hydrolyze hippurate and this test can also be used to identify presumptively GBS. [8]
This is called the CAMP test. Streptococcus agalactiae displays this property. Clostridium perfringens can be identified presumptively with this test. Listeria monocytogenes is also positive on sheep's blood agar. Alpha-hemolytic S. viridans (right) and beta-hemolytic S. pyogenes (left) streptococci growing on blood agar
[6] [7] After incubation (18–24 hours, 35-37 °C), the enrichment broth is subcultured overnight in blood agar plates and GBS-like colonies (big colonies, 3-4 millimeters diameter, surrounded by narrow zone of hemolysis) [6] [7] are identified by the CAMP test or using latex agglutination with GBS antiserum or MALDI-TOF.
This phenomenon is the mechanism behind the CAMP test, [2] a test that was historically used for the identification of Streptococcus agalactiae and Listeria monocytogenes. [3] A modified version of this test called the reverse CAMP test, utilizing S. agalactiae instead of S. aureus, can also be used to identify Clostridium perfringens.
Strep A is a type of bacteria that causes strep throat, but it can also lead to more serious infections. Skip to main content. 24/7 Help. For premium support please call: 800-290-4726 more ways to ...
The reverse CAMP test utilizes the synergetic hemolytic abilities of the CAMP factor produced by Streptococcus agalactiae with the α-toxin produced by Clostridium perfringens. Streaking these two organisms perpendicular to each other on a blood agar plate will yield a “bow-tie” clearing of the blood agar by the hemolytic capabilities of ...
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