关键词: 乳牛, 胎衣不下, 天花粉蛋白, 奶中残留, 放免分析法, 胎盘滞留, 花粉, 检测

Abstract: The study used RIA of Trichosanthin (TCS) to detect TCS contents in milk samples, which were collected from 41 milk cows retened fetal membrane (RFM) after administrating TCS concentrations as following:the value in 0-6 hr was high, and the contents fell to a valley floor from 6 to 18hr;the contents increased sparply to a peak value 35.0±12.6ng/ml in 18-24hr and then dropped in 30-36 hr, after 36-th hr the value decreased undulately untile undetected about 129-th hr. Basing on other factors, the authors think it is safe to drink the milk got from the cow which was treated for RFM by TCS. The results also indicate that TCS belongs to the fast-excretion type in the animal's body. So it's safe for cows, too. According to the clinical studies on human beings and this study, the authors put forward a hypothesis about the metabilic processsion of TCS and suggest that the uterus should be washed after the delivery of fetal membrane, so as to decrease the residue and duration time of TCS in milk.

Key words: DAIRY CATTLES, RETENED FETAL MEMBRANE (RFM), TRICHOSANTHIN, RESIDUUM OF MILK, RIA, RETAINED PLACENTA, DETECION