Chapman H D, Saleh E
Department of Poultry Science, University of Arkansas, Fayetteville 72701, USA.
Poult Sci. 1999 Jan;78(1):50-6. doi: 10.1093/ps/78.1.50.
The efficacy of different concentrations of monensin in turkeys exposed to field isolates of Eimeria and the effect of the withdrawal of monensin from their diet were investigated. Results of a battery study indicated that 66 ppm monensin was effective against three species of Eimeria in the turkey. In floor pens in which poults were exposed to infection, use of 59.5, 79.4, and 99.2 ppm monensin resulted in reduced mortality and improved feed conversion at 3 wk of age compared with birds that had received no medication. Poults given 59.5 ppm monensin weighed more and had a better feed conversion at 3 wk than poults given 79.4 or 99.2 ppm monensin, but at 10 wk no differences in the body weight or feed conversion of poults given different concentrations of drug were apparent. At 14 wk (and from 10 to 14 wk), poults that had been given 99.2 ppm monensin had a lower feed intake and weighed less than birds that had been given 59.5 ppm of the drug but there were no significant differences in feed conversion. There was no significant difference in the weight gain or feed conversion of poults from 10 to 14 wk of age whether monensin was present in the feed or had been withdrawn. No evidence of compensatory growth was found in the present study.
研究了不同浓度莫能菌素对感染艾美耳球虫田间分离株的火鸡的疗效，以及从其日粮中撤掉莫能菌素的影响。一系列研究结果表明，66 ppm的莫能菌素对火鸡的三种艾美耳球虫有效。在雏禽暴露于感染的地面围栏中，与未用药的禽类相比，使用59.5、79.4和99.2 ppm的莫能菌素可降低3周龄时的死亡率并改善饲料转化率。给予59.5 ppm莫能菌素的雏禽在3周龄时体重更重且饲料转化率更好，优于给予79.4或99.2 ppm莫能菌素的雏禽，但在10周龄时，给予不同浓度药物的雏禽在体重或饲料转化率方面没有明显差异。在14周龄时（以及从10周龄到14周龄期间），给予99.2 ppm莫能菌素的雏禽采食量较低且体重低于给予59.5 ppm该药物的禽类，但饲料转化率没有显著差异。在10至14周龄期间，无论饲料中是否含有莫能菌素或已撤掉莫能菌素，雏禽的体重增加或饲料转化率均无显著差异。在本研究中未发现补偿性生长的证据。
