title: Cryptosporidium parvum--propagation of oocyst in neonatal calves.
abstract: Shedding of Cryptosporidium parvum oocyst was studied in experimentally infected Jersey-Sindhi cross bred calves. Three 7 day old bull calves housed in isolation were orally infected with 10(8) oocysts of Cryptosporidium parvum. The prepatent and patent period of the experimental infection were 5 and 4 days respectively. Maximum oocyst output [2 x 10(5) oocyst per gram (OPG) was observed on the 7th day post inoculation (PI). The mean total oocyst output was 2.5 x 10(7). Diarrhoea started on the second day of oocyst shedding.
authors.affiliation: Department of Microbiology Dr. ALM Post Graduate Institute of Basic Medical Sciences University of Madras, Taramani.
authors.forename: M
authors.initials: M
authors.lastname: Ananthasubramanian
authors.forename: S
authors.initials: S
authors.lastname: Ananthan
mesh_terms: D000818:Animals; D000831:Animals, Newborn; D002417:Cattle; D003457:Cryptosporidiosis / Q000503:physiopathology* / Q000635:transmission; D016785:Cryptosporidium parvum / Q000254:growth & development / Q000302:isolation & purification; D005243:Feces / Q000469:parasitology; D008297:Male; D015053:Zygote