Avilamycin A is an antibiotic.1 It is active against veterinary isolates of C. perfringens (MICs = ≤0.06-0.5 mg/L) and B. hyodysenteriae (MICs = 12.5-100 μg/ml).1,2 Dietary administration of avilamycin A (15 and 30 ppm) reduces mortality in a broiler cockerel model of C. perfringens infection.3 Formulations containing avilamycin A have been used in the prevention of necrotic enteritis in livestock. |1. Watkins, K.L., Shryock, T.R., Dearth, R.N., et al. In-vitro antimicrobial susceptibility of Clostridium perfringens from commercial turkey and broiler chicken origin. Vet. Microbiol. 54(2), 195-200 (1997).|2. Uezato, K., Kinjo, E., and Adachi, Y. In vitro susceptibility of 21 antimicrobial agents to 37 isolates of Brachyspira hyodysenteriae isolated from pigs in Okinawa Prefecture. J. Vet. Med. Sci. 66(3), 307-309 (2004).|3. Paradis, M.A., McMillan, E., Bagg, R., et al. Efficacy of avilamycin for the prevention of necrotic enteritis caused by a pathogenic strain of Clostridium perfringens in broiler chickens. Avian Pathol. 45(3), 365-369 (2016).