Droual R, Shivaprasad H L, Chin R P
California Veterinary Diagnostic Laboratory System, University of California, Davis, Fresno 93725.
Avian Dis. 1994 Jan-Mar;38(1):177-83.
A flock of turkey primary breeder candidates experienced increased mortality within 1 week of being placed in a growout house at 5 weeks 4 days of age. The flock was placed on wood shavings that had been used by an older flock for 2 weeks immediately before placement. Necropsy revealed severe coccidiosis and necrotic enteritis primarily in the distal jejunum, ileum, cecum, and colon. Clostridium perfringens was cultured from intestines. When breeders were selected at 17 weeks of age, total mortality in the affected flock was twice that of a comparable flock placed on fresh litter. Weight at selection in the affected flock was also significantly lower than in flocks placed on fresh litter at the same time in the same growout house.
一群5周4天大的火鸡原种候选鸡在放入育成舍1周内死亡率增加。这群鸡被放置在一批老龄鸡群刚用过两周的刨花上。尸检显示，严重球虫病和坏死性肠炎主要发生在空肠远端、回肠、盲肠和结肠。从肠道中培养出了产气荚膜梭菌。17周龄选种时，受影响鸡群的总死亡率是放置在新鲜垫料上的对照鸡群的两倍。受影响鸡群选种时的体重也显著低于同一育成舍同期放置在新鲜垫料上的鸡群。
