Roberts J A, Fernando S T
Faculty of Veterinary Medicine and Animal Science, University of Peradeniya, Sri Lanka.
Vet Res Commun. 1990;14(6):481-8. doi: 10.1007/BF00367060.
Buffalo aged 3-15 months on institutional farms and in the villages of an irrigation project were monitored for gastrointestinal nematodes by faecal egg counts over two years. Apart from treatment for Toxocara vitulorum at 10-16 days of age, no anthelmintics were used. Half of the strongylid egg counts were zero and 90% were less than 500 epg of faeces on the institutional farms, and 67% were zero and 97% less than 500 epg in the villages. No problems arose during four years without anthelmintics on the institutional farms and during two years in the villages. Autopsies demonstrated that the eggs which were present were produced by mixed infections of small numbers of Haemonchus spp., Mecistocirrus digitatus, Trichostrongylus spp., Bunostomum phlebotomum and Cooperia spp. High egg counts of Strongyloides papillosus occurred in calves up to six months old, but were not pathogenic.
在两年时间里，通过粪便虫卵计数对机构化养殖场以及一个灌溉项目村庄中3至15月龄的水牛进行了胃肠道线虫监测。除了在10至16日龄时对犊牛弓首蛔虫进行治疗外，未使用任何驱虫药。在机构化养殖场，半数圆线虫虫卵计数为零，90%低于每克粪便500个虫卵；在村庄中，67%为零，97%低于每克粪便500个虫卵。在机构化养殖场四年未使用驱虫药以及在村庄两年未使用驱虫药期间，均未出现问题。解剖显示，所发现的虫卵是由少量血矛线虫属、指形长刺线虫、毛圆线虫属、牛钩口线虫和古柏线虫属混合感染产生的。在6月龄以下的犊牛中，乳头类圆线虫的虫卵计数很高，但不具致病性。
