Prevalence of Eimeria infection in yaks on the Qinghai-Tibet Plateau of China.
J Parasitol
; 98(5): 958-62, 2012 Oct.
Article
em En
| MEDLINE
| ID: mdl-22524406
ABSTRACT
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. pellita (35.4%), E. canadensis (33.6%), E. bovis (23.0%), E. cylindrica (16.8%), E. subspherica (16.8%), E. ellipsoidalis (14.1%), E. brasiliensis (13.3%), E. wyomingensis (8.0%), E. alabamensis (7.1%), E. illinoisensis (5.3%), E. auburnensis (4.4%), E. bombayansis (3.5%), and E. bukidnonensis (2.7%). Mixed infections of 2 to 7 species were found in 66.4% of the animals. There was an age-related difference in the prevalence of infection. The highest prevalence (53.3%) was observed in calves, an intermediate prevalence in yearlings (36.1%), and the lowest was in adults (15.6%). The number of oocysts per g of feces was significantly higher in calves than in adults. More Eimeria species were indentified in calves. Eimeria zuernii was the most prevalent species in calves and adults, whereas in yearling yaks E. pellita was most common. The majority of calves and yearlings showed mixed infection, but adults tended to be infected with 1 species. The prevalence and intensity of Eimeria species were found to show statistically significant differences among different regions in Qinghai Province.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Doenças dos Bovinos
/
Coccidiose
/
Eimeria
Tipo de estudo:
Observational_studies
/
Prevalence_studies
/
Prognostic_studies
/
Risk_factors_studies
Limite:
Animals
País/Região como assunto:
Asia
Idioma:
En
Revista:
J Parasitol
Ano de publicação:
2012
Tipo de documento:
Article