Comparison of the CAMP test with Streptococcus agalactiae and the reverse CAMP test. The reverse CAMP reaction is a reaction whereby hemolysis by the beta-hemolysin of staphylococci is inhibited through the production of phospholipase C or D by some organisms (e.g., some corynebacteria). An arrow of no hemolysis is formed at the junction of the organism being tested with the staphylococci if the reverse CAMP test is positive.