ID#: 10853
Caption:
If the laboratory is not able to identify group-B streptococci (GBS) by the Lancefield grouping procedure, there are other microbiologic tests that can be used to identify GBS. This picture shows one of these tests. It is called the CAMP test. CAMP is an acronym for the authors of this test (Christie, Atkinson, Munch, Peterson). The CAMP test takes advantage of the capacity of GBS to produce this CAMP factor; most other hemolytic streptococci do not produce CAMP factor.

This picture shows the growth and CAMP test of a GBS (Lt), and a group A Streptococcus (GAS) (Rt). On the top of the agar plate we have inoculated the plate with a Staphylococcus strain (horizontal streak). We then inoculated the GBS (on left) and GAS (on right) perpendicular to the “Staph” streak, making sure not to touch the two different organisms (Staph and Strep), but to come close to each other.
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Content Provider(s): CDC/ Dr. Richard Facklam
Creation Date: 2008
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Copyright Restrictions: None - This image is in the public domain and thus free of any copyright restrictions.