摘要
毒害艾美耳球虫扬州田间分离株以不同的剂量(10 000,30 000,50 000,70 000,90 000个卵囊/羽)感染28日龄黄羽肉雏鸡,以平均增重、死亡率、病变记分等指标评价其致病性。结果显示,除10 000个卵囊组外,其余4个剂量组均显著影响增重(P<0.05),并引起鸡的死亡,死亡率分别为37.5%～50%、37.5%～50%、62.5%、75%～87.5%;各感染组均出现肠道病变,其中10 000个卵囊组的病变值显著小于其余4个剂量组(P<0.05),但与不感染对照组相比有显著差异(P<0.05)。结论表明,该毒害艾美耳球虫田间分离株有很强的致病性。
In order to study the pathogenicity of Eimeria necatrix isolated from a field in Yangzhou,China,five different doses of E.necatrix oocysts were orally administered to 28-day-old broiler chickens.The pathogenicity was evaluated based on the average weight gain,mortality and lesion score.Except for the groups given 1×104 oocysts,the groups given 3,5,7,and 9×104 oocysts had dead chickens,and the mortalities were 37.5%~50%,37.5%~50%,62.5%,and 75%~87.5%,respectively.Compared with the non-inoculated groups,the average weight gains of the groups given 3,5,7,and 9×104 oocysts were decreased significantly（P〈0.05）.The intestine lesion occurred in all of the infected groups,but the lesion scores of the groups given 1×104 oocysts were the lowest among all the infected groups,and the differences of the lesion scores were significant（P〈0.05）.It could be concluded that the strain was highly pathogenic.
出处
《中国兽医杂志》
CAS
北大核心
2012年第6期18-20,共3页
Chinese Journal of Veterinary Medicine
基金
教育部创新团队项目(IRT0978)
江苏省属高校自然科学基金重大项目(11KJA230002)
