McElroy A P, Manning J G, Jaeger L A, Taub M, Williams J D, Hargis B M
Department of Poultry Science, Texas Agricultural Experiment Station, College Station 77843.
Avian Dis. 1994 Apr-Jun;38(2):329-33.
The effect of continuous (42 days) dietary administration of 5 or 20 ppm capsaicin to broiler chickens on Salmonella enteritidis susceptibility, body weight, and feed efficiency was investigated. Chickens were weighed at 1, 21, and 42 days of age. No significant differences in body weight or feed efficiency were observed. Chickens were challenged with 1 x 10(8) colony-forming units of S. enteritidis at 21, 28, or 42 days of age. The S. enteritidispositive culture rate for cecal tonsils was significantly lower (P < 0.05) in the treatment groups receiving 5 ppm or 20 ppm dietary capsaicin than in the untreated control group at all challenge times. Dietary capsaicin (5 and 20 ppm) resulted in protection against S. enteritidis organ invasion at 28 days in one experiment and at both 21 and 42 days in the other. These results indicate that continual dietary capsaicin administration increases resistance to S. enteritidis colonization and organ invasion throughout the normal growth period without detrimental effects on growth in broiler chickens.
研究了连续42天给肉鸡日粮添加5 ppm或20 ppm辣椒素对肠炎沙门氏菌易感性、体重和饲料效率的影响。在1日龄、21日龄和42日龄时对鸡进行称重。未观察到体重或饲料效率有显著差异。在21日龄、28日龄或42日龄时，用1×10⁸个肠炎沙门氏菌菌落形成单位对鸡进行攻毒。在所有攻毒时间，接受5 ppm或20 ppm日粮辣椒素的处理组盲肠扁桃体的肠炎沙门氏菌阳性培养率均显著低于未处理的对照组（P<0.05）。在一项实验中，日粮辣椒素（5 ppm和20 ppm）在28日龄时可防止肠炎沙门氏菌侵袭器官，在另一项实验中，在21日龄和42日龄时均可防止。这些结果表明，在肉鸡正常生长期间，持续日粮添加辣椒素可增强对肠炎沙门氏菌定植和器官侵袭的抵抗力，且对生长无不利影响。
