The CAMP (Christie, Atkins, and Munch-Petersen) test can be used to distinguish between Streptococcus pyogenes and Streptococcus agalactiae. In this test, a culture of the test organism is streaked on a blood agar plate, and a strip of Staphylococcus aureus is streaked perpendicular to it. The test is positive if the growth of the test organism is enhanced in the shape of an arrowhead around the Staphylococcus aureus streak.