食用天然污染全棉籽的奶牛对黄曲霉毒素的转化

Aflatoxin Conversion by Dairy Cattle Consuming Naturally-Contaminated Whole Cottonseed .

作者信息

Price Ralph L, Paulson J H, Lough Otis G, Gingg Conrad, Kurtz Andy G

机构信息

Department of Nutrition and Food Science, The University of Arizona, Tucson, Arizona 85721, Office of the Arizona State Chemist, Mesa, Arizona, Cooperative Extension Service, University of Arizona, Phoenix, Arizona 85040, Triple G Dairies, Tolleson, Arizona and United Dairymen of Arizona, Mesa, Arizona and Arizona Farm Bureau, Phoenix, Arizona.

出版信息

J Food Prot. 1985 Jan;48(1):11-15. doi: 10.4315/0362-028X-48.1.11.

DOI:10.4315/0362-028X-48.1.11

PMID:30934492

Abstract

Whole cottonseed determined to have aflatoxin B (AFB) levels of 5, 31, 104, 280, and 560 μg/kg was fed as 15% of the total dairy ration to a commercial herd of 90 grade Holstein dairy cattle for 70 d. Milk from the bulk tank was sampled either daily or after each milking and analyzed for aflatoxin M (AFM). The ratio for AFB in the dairy ration to AFM in the milk averaged 75 to 1 under conditions and at levels tested with no consistent relation to the level of AFB in the feed. Approximately 1.6% conversion occurred during the steady state of consumption and secretion. The federal action level of 0.5 μg AFM/L of milk would be produced by cows consuming a ration containing 15% whole cottonseed contaminated with approximately 250 μg AFB/kg.

摘要

将黄曲霉毒素B（AFB）含量分别为5、31、104、280和560μg/kg的全棉籽作为总日粮的15%，饲喂给一个拥有90头荷斯坦奶牛的商业牛群，为期70天。每天或每次挤奶后采集奶罐中的牛奶，分析其中的黄曲霉毒素M（AFM）。在所测试的条件和水平下，日粮中AFB与牛奶中AFM的比例平均为75比1，且与饲料中AFB的水平没有一致的关系。在稳定的采食和分泌状态下，转化率约为1.6%。奶牛食用含有15%被约250μg AFB/kg污染的全棉籽的日粮时，牛奶中AFM的含量将达到联邦行动水平0.5μg AFM/L。