title: Detection of faecal Cryptosporidium parvum antigen in diarrheic Holstein dairy cows.
abstract: Over a one-year period, based on a random cluster sampling design, 661 faecal   samples from natural cases of diarrheic calves were taken in Fars province of Iran. The   samples were taken from the 267 diarrheic calves of high and 394 diarrheic calves of average   producing Holstein dairy cows. Faecal samples were collected directly from the rectum.   Herd selection was based on geographical location and density of cattle in the region.   Samples were collected based on 5 percent of herd population in 4 geographical regions:   North, West, East and South of Fars province. The herds were stratified into small, medium   and large size. Laboratory investigation consisted of a direct identification test for antigen of   Cryptosporidium parvum. All herds had HPDC and APDC Cryptosporidium-infected diarrheic   calves in their population. Diarrheic Cryptosporidium infected HPDC calves in southern   region of Fars province were at much lower risk (P<0.05) than APDC calves. The rate of   Cryptosporidium infection in diarrheic APDC calves in southern region of Fars province was   highest when compared to other geographical locations. When considering the effect of age,   diarrheic Cryptosporidium affected APDC Holstein calves of younger dams (>2 to 3years)   showed a higher rate of infection when compared to diarrheic HPDC Cryptosporidium   infected ones. There were no differences among the occurrence of Cryptosporidium infection   in diarrheic HPDC and APDC calves of different herd size groups.
authors: Department of Clinical Sciences, School of Veterinary Medicine, Shiraz University, Shiraz, Iran. badiei33@gmail.com
authors: K
authors: K
authors: Badiei
authors: M
authors: M
authors: Pourjafar
authors: M
authors: M
authors: Ghane
mesh_terms: D000818:Animals; D000953:Antigens, Protozoan / Q000032:analysis*; D002417:Cattle; D002418:Cattle Diseases / Q000453:epidemiology* / Q000469:parasitology*; D003457:Cryptosporidiosis / Q000453:epidemiology / Q000469:parasitology / Q000662:veterinary*; D016785:Cryptosporidium parvum / Q000737:chemistry / Q000302:isolation & purification*; D003967:Diarrhea / Q000453:epidemiology / Q000469:parasitology / Q000662:veterinary*; D005243:Feces / Q000469:parasitology*; D007492:Iran / Q000453:epidemiology; D015995:Prevalence; D012007:Rectum / Q000469:parasitology; D018570:Risk Assessment; D012307:Risk Factors
chemical_list: D000953:Antigens, Protozoan