title: Potential risk factors for Cryptosporidium infection in dairy calves.
abstract: Fecal samples from 7,369 calves on 1,103 farms were examined for cryptosporidia in a nationwide survey, using monoclonal antibody technique. Cryptosporidium oocysts were found in calves from 652 (59.1%) of the farms and in 1,648 (22.4%) of the tested calves. Almost half the calves between 7 and 21 days of age had cryptosporidia in their fecal samples. Prevalence was highest during the summer. Farms with multiple-cow maternity facilities and farms with > 100 milking cows were the most likely to have calves with cryptosporidia.
authors.affiliation: USDA:APHIS: National Animal Health Monitoring System, Fort Collins, CO 80521.
authors.forename: L P
authors.initials: LP
authors.lastname: Garber
authors.forename: M D
authors.initials: MD
authors.lastname: Salman
authors.forename: H S
authors.initials: HS
authors.lastname: Hurd
authors.forename: T
authors.initials: T
authors.lastname: Keefe
authors.forename: J L
authors.initials: JL
authors.lastname: Schlater
mesh_terms: D017677:Age Distribution; D000818:Animals; D000833:Animals, Suckling; D002417:Cattle; D002418:Cattle Diseases / Q000453:epidemiology*; D003457:Cryptosporidiosis / Q000453:epidemiology*; D003458:Cryptosporidium / Q000302:isolation & purification; D005243:Feces / Q000469:parasitology; D005260:Female; D007411:Intestinal Diseases, Parasitic / Q000453:epidemiology / Q000662:veterinary*; D016015:Logistic Models; D015995:Prevalence; D012307:Risk Factors; D012621:Seasons; D014481:United States / Q000453:epidemiology