Epidemiological Investigation of Coccidial Infection in Yak Farms in Some Areas of Sichuan and Tibet
[Objective]The purpose of this experiment was to investigate the coccidial infection of yak in some areas of Sichuan and Tibet,and provide theoretical reference for the prevention and control of yak coccidiosis in this area.[Method]A total of 376 fecal samples of yaks aged 2 to 6,7 to 12 and over 12 months were collected from 8 yak farms in some areas of Sichuan and Tibet.Qualitative examination of coccidium oocysts in fecal samples was carried out by saturated saline flotation method.The oocyst per gram(OPG)in coccidioid positive fecal samples was counted by MacMaster's method,and to understand the coccidial infection of yaks in different farms and at different ages.[Result]A total of 85 positive samples were detected in 8 yak farms,with an average infection rate of 22.6％(85/376)and an average OPG of 1 643.A total of 9 Eimeria species were detected,the dominant species was Eimeria alabamensis,and the infection rate was 37.6％(32/85),most of which were mixed infections.The average infection rate was the highest in yaks aged 2 to 6 months(37.9％(11/29)).The infection rate was 31％(57/184)in yaks aged 7 to 12 months.The infection rate of coccidia in yaks over 12 months was 10.4％(17/163).[Conclusion]There were different degrees of coccidial infection in yaks in some areas of Sichuan and Tibet,and the mixed infection was the main infection.The infection rate,infection intensity and dominant species of coccidia in yaks were different in different regions and at different ages.
国家科技期刊平台
NSTL
万方数据
维普
