Which organism yields a positive CAMP test?

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Prepare for the Clinical Laboratory Science Bacteriology Test. Engage with multiple choice questions and flashcards with helpful hints and explanations. Ace your exam confidently!

Multiple Choice

Which organism yields a positive CAMP test?

Explanation:
The test identifies a CAMP factor produced by Streptococcus agalactiae that works with the beta-lysin from Staphylococcus aureus to boost red blood cell lysis on blood agar. In practice, a streak of Staphylococcus aureus is laid down on the plate and the test organism is streaked perpendicular to it. If the test organism is Streptococcus agalactiae, the interaction creates an arrowhead-shaped zone of enhanced β-hemolysis at the intersection, indicating a positive CAMP test. This enhancement does not occur with the other organisms listed, which lack the CAMP factor, so their results are negative. Staphylococcus aureus serves as the factor source in this test, not the organism being tested.

The test identifies a CAMP factor produced by Streptococcus agalactiae that works with the beta-lysin from Staphylococcus aureus to boost red blood cell lysis on blood agar. In practice, a streak of Staphylococcus aureus is laid down on the plate and the test organism is streaked perpendicular to it. If the test organism is Streptococcus agalactiae, the interaction creates an arrowhead-shaped zone of enhanced β-hemolysis at the intersection, indicating a positive CAMP test. This enhancement does not occur with the other organisms listed, which lack the CAMP factor, so their results are negative. Staphylococcus aureus serves as the factor source in this test, not the organism being tested.

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