Skrivanová V, Machanová L, Svoboda T
Výzkumný ústav zivocisné výroby, Praha-Uhrínĕves.
Vet Med (Praha). 1992 Sep-Oct;37(9-10):501-7.
The aim of this study was to find out the influence of monensin, a ionophore antibiotic, on calf performance and selected physiological parameters. Monensin is a product of Streptomyces cinnamonensis. It has effects on all Gram-negative microbes, such as Escherichia coli, salmonellas, pseudomonads and vibria. It has a small effect on Gram-positive microbes. At the beginning of the experiment eight young crossbred bulls (C x N) at the age of three weeks were weighted and divided into two groups, experimental and control ones. Calves were kept in individual boxes and fed acidified whole milk (2 ml of 85% formic acid per 1 litre of milk). They had a free access to concentrates (COT), hay and drinking water. The calves received 3 lt. of whole milk twice a day until the age of eight weeks. 0.5 mg of monensin per 1 kg live weight were served orally to calves of the experimental group every day. Monensin was made by the Spofa Corporation, Prague. Daily intake of feed was recorded and the calves were weighted once a week. Blood samples were taken from the jugular vein before the beginning of the experiment, and in the period from the fifth to the tenth week of age, always before morning feeding. The average daily live weight gain was 0.452 kg and 0.471 kg for the control and experimental group, respectively, during the milk feeding period, the index being 104.2 (Tab. I). Tab. II shows the average feed intake per 1 kg live weight gain.(ABSTRACT TRUNCATED AT 250 WORDS)
本研究的目的是探究离子载体抗生素莫能菌素对犊牛生产性能和选定生理参数的影响。莫能菌素是肉桂链霉菌的产物。它对所有革兰氏阴性微生物都有作用，如大肠杆菌、沙门氏菌、假单胞菌和弧菌。对革兰氏阳性微生物的作用较小。实验开始时，对8头三周龄的杂交公牛（C×N）进行称重，并分为两组，即实验组和对照组。犊牛饲养在单独的栏舍中，饲喂酸化全脂牛奶（每升牛奶中添加2毫升85%的甲酸）。它们可以自由采食精料（COT）、干草和饮水。犊牛每天两次共采食3升全脂牛奶，直至八周龄。实验组的犊牛每天按每千克体重口服0.5毫克莫能菌素。莫能菌素由布拉格的Spofa公司生产。记录每日采食量，每周对犊牛称重一次。在实验开始前以及五至十周龄期间，每天早晨饲喂前从颈静脉采集血样。在喂奶期，对照组和实验组的平均日增重分别为0.452千克和0.471千克，指数为104.2（表I）。表II显示了每增重1千克的平均采食量。（摘要截选至250词）
