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CAMP Test for the Identification of b-Hemolytic Streptococcus agalactiae (Group B) Send Print

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Created: Monday, 09 October 2006
Last update: Monday, 31 January 2011
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S.agalactiae, S.pyogenes with S. aureus (Enlarged view)
FIG. 1. CAMP test showing the arrow-shaped zone of enhanced hemolysis (positive result) of Streptococcus agalactiae (group B) and the negative result of Streptococcus pyogenes (group A) when tested against Staphylococcus aureus. (Anne Hanson, University of Maine, Orono, ME) 
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S.agalactiae, S.pyogenes with S. aureus (Enlarged view)
FIG. 2. CAMP test showing the arrow-shaped zone of enhanced hemolysis (positive result) of Streptococcus agalactiae (group B) and the negative result of Streptococcus pyogenes (group A) when tested against Staphylococcus aureus. (Anne Hanson, University of Maine, Orono, ME) 
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S.agalactiae, S.pyogenes with S. aureus (Enlarged view)
FIG. 3. CAMP test showing the arrow-shaped zone of enhanced hemolysis (positive result) of Streptococcus agalactiae (group B) and the negative result of Streptococcus pyogenes (group A) when tested against Staphylococcus aureus. (Anne Hanson, University of Maine, Orono, ME) 
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S.agalactiae with S. aureus (Enlarged view)
FIG. 4. Close-up view of a positive CAMP test on Streptococcus agalactiae  (group B) when tested against Staphylococcus aureus. Note the arrow-shaped zone of enhanced hemolysis resulting in complete clearing of the blood agar plate. (Anne Hanson, University of Maine, Orono, ME)
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S.pyogenes with S. aureus (Enlarged view)
FIG. 5. Close-up view of a negative CAMP test on Streptococcus pyogenes (group A) when tested against Staphylococcus aureus. Note the absence of the arrow-shaped zone of enhanced hemolysis. (Anne Hanson, University of Maine, Orono, ME)
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S.agalactiae with S. aureus (Enlarged view)
FIG. 6. CAMP-positive Streptococcus agalactiae (group B) inoculated at right angles to the test organism Staphylococcus aureus. Note the arrow-shaped zones of enhanced hemolysis. (Matthew Pietraszewski, University of Maine, Orono, ME)

 

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S.pyogenes with S. aureus (Enlarged view)
FIG. 7. CAMP-negative Streptococcus pyogenes (group A) inoculated at right angles to the test organism Staphylococcus aureus. Note the absence of arrow-shaped zones of enhanced hemolysis. (Matthew Pietraszewski, University of Maine, Orono, ME)
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CAMP Test Spanish Translation

REVIEWERS
 
This resource was peer-reviewed at ASM Conference for Undergraduate Education 2006.

Participating reviewers:

D’Maris Allen-Mierl

Austin Community College, Austin, TX
 
Rebecca Buxton
University of Utah, Salt Lake City, UT

Lucy Kluckhohn Jones
Santa Monica College, Santa Monica, CA

Dawn Madl
NE Wisconsin Technical College, Green Bay, WI
 
Anne Mason
Mesa Community College, Mesa, AZ

Johana Melendez
Hillsborough County Community College, Plant City, FL

Peter Milligan

University of Maine at Augusta, Augusta, ME
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