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Journal of Clinical Microbiology
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Research Article

Rapid tube CAMP test for identification of Streptococcus agalactiae (Lancefield group B).

E A Phillips, J W Tapsall, D D Smith
E A Phillips
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J W Tapsall
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D D Smith
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ABSTRACT

A rapid CAMP test for the presumptive identification of Streptococcus agalactiae (Lancefield group B) is described. Sheep erythrocytes, sensitized by staphylococcal beta-lysin and suspended in phosphate-buffered saline, were used to determine the lytic capacity of the neutralized supernatant fluids of 4-h broth cultures of streptococci being tested. A total of 96.2% of 130 group B streptococci gave positive CAMP tests, that is, lysis of the sheep erythrocytes after 10 min of exposure of streptococcal supernatants, whereas none of 381 non-group B streptococci tested produced any lysis. The test described provides presumptive identification of group B streptococci within 4 h and eliminates problems of intermediate reactions so that a positive test is indicative only of CAMP factor production.

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Rapid tube CAMP test for identification of Streptococcus agalactiae (Lancefield group B).
E A Phillips, J W Tapsall, D D Smith
Journal of Clinical Microbiology Aug 1980, 12 (2) 135-137; DOI:

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Rapid tube CAMP test for identification of Streptococcus agalactiae (Lancefield group B).
E A Phillips, J W Tapsall, D D Smith
Journal of Clinical Microbiology Aug 1980, 12 (2) 135-137; DOI:
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