World Library  
Flag as Inappropriate
Email this Article

CAMP test

Article Id: WHEBN0020667546
Reproduction Date:

Title: CAMP test  
Author: World Heritage Encyclopedia
Language: English
Subject: Streptococcus iniae, Ureaplasma infection, Cutaneous Streptococcus iniae infection, Streptococcus mitis, Enterococcus faecium
Collection: Medical Tests, Microbiology Techniques
Publisher: World Heritage Encyclopedia

CAMP test

This is an example of a positive CAMP test indicated by the formation of an arrowhead where the Strep group B (Streptococcus agalactiae) meets the Staphylococcus aureus (white middle streak).

The CAMP test is a test to identify Group B β-streptococci[1][2] based on their formation of a substance (CAMP factor[3]) that enlarges the area of hemolysis formed by β-hemolysin from Staphylococcus aureus. It is frequently used to identify Listeria spp.


  • CAMP factor 1
  • Uses 2
  • History 3
  • References 4

CAMP factor

Although usually used to identify group "B", there is some evidence that the CAMP factor gene is present in several groups of streptococci, including group "A".[4]

A similar factor has been identified in Bartonella henselae.[5]


It can be used to identify Streptococcus agalactiae. Though not strongly beta-hemolytic on its own,[6] it presents with a wedge-shape in the presence of Staphylococcus aureus.[7]


It is an acronym for "Christie Atkins Munch-Petersen",[8][9][10] for the three researchers who discovered the phenomenon.[11]

It is often incorrectly reported as the product of four people (counting Munch-Petersen as two people).[12]

The name has no relationship to Cyclic adenosine monophosphate (cAMP).


  1. ^ Phillips EA, Tapsall JW, Smith DD (August 1980). "Rapid tube CAMP test for identification of Streptococcus agalactiae (Lancefield group B)". J. Clin. Microbiol. 12 (2): 135–7.  
  2. ^ Wilkinson HW (July 1977). "CAMP-disk test for presumptive identification of group B streptococci". J. Clin. Microbiol. 6 (1): 42–5.  
  3. ^ "Laboratory Demonstrations". Retrieved 2008-12-12. 
  4. ^ Gase K, Ferretti JJ, Primeaux C, McShan WM (September 1999). "Identification, cloning, and expression of the CAMP factor gene (cfa) of group A streptococci". Infect. Immun. 67 (9): 4725–31.  
  5. ^ Litwin CM, Johnson JM (July 2005). "Identification, cloning, and expression of the CAMP-like factor autotransporter gene (cfa) of Bartonella henselae". Infect. Immun. 73 (7): 4205–13.  
  6. ^ "Microbiology Primer: Hemolysis". Retrieved 2008-12-12. 
  7. ^ "Streptococcaceae Answers". Retrieved 2008-12-12. 
  8. ^ Ratner HB, Weeks LS, Stratton CW (August 1986). "Evaluation of spot CAMP test for identification of group B streptococci". J. Clin. Microbiol. 24 (2): 296–7.  
  9. ^ Nsagha DS, Bello CS, Kandakai-Olukemi YT (January 2000). "Hippurate hydrolysis and Christie, Atkins, Munch-Peterson tests as epidemiological diagnostic tools for Streptococcus agalactiae carriage in pregnancy". East Afr Med J 77 (1): 34–6.  
  10. ^ Valanne S, McDowell A, Ramage G, et al. (May 2005). "CAMP factor homologues in Propionibacterium acnes: a new protein family differentially expressed by types I and II". Microbiology (Reading, Engl.) 151 (Pt 5): 1369–79.  
  11. ^ Christie, R., Atkins, NE and Munch-Petersen, E. (1944). A note on a lytic phenomenon shown by group B streptococci. Aust. J. Exp. Biol. Med. Sci. 22, 197-200
  12. ^ "Streptococci". Retrieved 2008-12-12. 
This article was sourced from Creative Commons Attribution-ShareAlike License; additional terms may apply. World Heritage Encyclopedia content is assembled from numerous content providers, Open Access Publishing, and in compliance with The Fair Access to Science and Technology Research Act (FASTR), Wikimedia Foundation, Inc., Public Library of Science, The Encyclopedia of Life, Open Book Publishers (OBP), PubMed, U.S. National Library of Medicine, National Center for Biotechnology Information, U.S. National Library of Medicine, National Institutes of Health (NIH), U.S. Department of Health & Human Services, and, which sources content from all federal, state, local, tribal, and territorial government publication portals (.gov, .mil, .edu). Funding for and content contributors is made possible from the U.S. Congress, E-Government Act of 2002.
Crowd sourced content that is contributed to World Heritage Encyclopedia is peer reviewed and edited by our editorial staff to ensure quality scholarly research articles.
By using this site, you agree to the Terms of Use and Privacy Policy. World Heritage Encyclopedia™ is a registered trademark of the World Public Library Association, a non-profit organization.

Copyright © World Library Foundation. All rights reserved. eBooks from World eBook Library are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.