Giardia and Cryptosporidium in dairy calves in British Columbia.

摘要: A study was undertaken to determine the prevalence of Giardia infections in dairy calves and compare Cryptosporidium different ages. Fresh fecal samples were collected from 386 male female Holstein (newborn 24 wk) 20 dairies located lower Fraser river valley area British Columbia. intestinalis, parvum, muris enumerated each sample after concentration by sucrose gradient centrifugation immunofluorescent staining. identified at all farm locations. The overall 73% with a geometric mean cyst count 1180 cysts per gram feces (CI, 41 5014). parvum C. 80% 40% farms, respectively. 59%, for oocysts 457 18 160). only 2% oocyst counts 54 feces. Giardiasis not age dependent, approximately 2 wk infected. In contrast, predominant 4 wk, while demonstrated older than wk. Fourty-seven percent diarrhea had high numbers their are highly prevalent should be considered animals or failure thrive.