“…33: -1146 N ICARBAZIN has been reported to be an efficient prophylactic agent for the control of cecal coccidiosis in chickens by Barber (1955), Ott, Kuna, Porter, Cuckler and Fogg (1955), Rubin, Mc-Loughlin, Costello and Wehr (1956), and others. Furthermore, Barber (1955), Cuckler, Malanga and Ott (1956), , Marthedal and Veiling (1957), and McLoughlin, Rubin and Cordray (1957) have reported that this drug does not interfere with the development of immunity under the experimental conditions described. The data herein, which deal with a range in size of immunizing infections, substantiate and augment the earlier findings.…”