Bradley R E, Bliss D H, Newby T J
Am J Vet Res. 1986 Nov;47(11):2385-8.
The effectiveness of a morantel sustained-release bolus (MSRB) in controlling gastrointestinal nematode infections was determined in 70 Holstein heifer calves with no prior grazing experience. Calves were allotted to 2 treatment groups and were maintained in Florida during the grazing season on divided pastures of equal area. One MSRB was administered to each calf in 1 group at the time of turnout onto spring pasture, whereas calves in the other group remained as nonmedicated controls. By the end of the grazing season, treatment resulted in significantly (P less than 0.05) lower worm burdens and significantly improved weight gains. The MSRB-treated calves were able to reach breeding weight 2 to 4 weeks earlier than did nonmedicated calves.
在70头没有放牧经验的荷斯坦小母牛犊牛中，测定了莫仑太尔缓释大丸剂（MSRB）控制胃肠道线虫感染的效果。将犊牛分配到2个治疗组，并在放牧季节饲养在佛罗里达州面积相等的分开牧场中。一组中的每头犊牛在转入春季牧场时给予一剂MSRB，而另一组中的犊牛作为未用药的对照。到放牧季节结束时，治疗导致虫负荷显著降低（P<0.05），体重增加显著改善。经MSRB处理的犊牛比未用药的犊牛能够提前2至4周达到配种体重。
