| prevalence of eimeria infection in yaks on the qinghai-tibet plateau of china. | few data are available on the prevalence of eimeria spp. in yaks. an observational study was conducted to determine the prevalence of coccidial infection in yaks on the qinghai-tibet plateau of china. a total of 324 fecal samples from 4 counties was examined, and oocysts were identified to the species level on the basis of morphological features. eimeria oocysts were found in 113 (34.9%) samples. the species detected and their prevalence values included the following: eimeria zuernii (54.9%), e. ... | 2012 | 22524406 |