It can be used for differentiation of Clostridium perfringens from other Clostridium species. Here, a CAMP positive Group B Streptococcus is streaked in the center of sheep blood agar, and Clostridium perfringens is streaked perpendicular to it. Following incubation at 37oC for 24-48 hours in anaerobic conditions, an “arrowhead” hemolysis is seen between the growth of Clostridium perfringens and Group B Streptococcus. This is because of alpha toxin produced by Clostridium perfringens interacts with CAMP factor and produce synergistic hemolysis. - See more at: http://microbesinfo.com/2013/07/camp-test-christie-atkins-and-munch-peterson-test/#sthash.bGlH5LVU.dpuf