Understanding and controlling necrotic enteritis in broiler chickens Principal Investigator John Prescott, University of Guelph Year the work was done 2013-2016 Overall objective To develop a live oral Clostridium perfringens vaccine to control necrotic enteritis. Outcomes Transcriptomic analysis of did not identify clear vaccine candidates. A live, attenuated oral Clostridium perfringens vaccine against necrotic enteritis of broiler chickens was not achieved. The results show that this approach will not result in an effective vaccine. Five mutants of a necrotic enteritis strain of C. perfringens have been shown to be attenuated for virulence. Application Identified genes of C. perfringens likely very important in the initiation of NE in the broiler chicken for further studies. This research applies to Broilers