title: Prevalence and risk factors associated with Cryptosporidium oocysts shedding in pigs in Central Vietnam.
abstract: We investigated the prevalence and risk factors associated with Cryptosporidium oocysts shedding in pigs in Central Vietnam. A total of 740 single fecal samples collected from diarrheic and non-diarrheic pigs on 89 farms were screened by the modified Ziehl-Neelsen staining method. Prevalence at the animal and the farm levels were 18.1% (134/740) and 71.9% (64/89), respectively. Risk factors for the infection were identified using univariate and multivariate logistic regression analysis. The results revealed that age, sanitary condition and topography were significantly associated with oocyst shedding (P<0.05). Pre-weaned piglets were at the highest risk for infection, followed by post-weaners, sows and finishing pigs. Good sanitary conditions showed positive effects in decreasing oocysts shedding. Topographically, Cryptosporidium was more common in mountainous zone than that in coastal delta zone. There was an association between the occurrence of diarrhea and the level of Cryptosporidium oocyst excretion within infected pigs. This is the first epidemiological investigation of prevalence and risk factors of Cryptosporidium in pigs in Vietnam.
authors.affiliation: Laboratory of Sustainable Environmental Biology, Graduate School of Agricultural Science, Tohoku University, Naruko-Onsen, Osaki, Miyagi 989-6711, Japan.
authors.forename: Sam Thi
authors.initials: ST
authors.lastname: Nguyen
authors.forename: Hajime
authors.initials: H
authors.lastname: Honma
authors.forename: Thomas
authors.initials: T
authors.lastname: Geurden
authors.forename: Makoto
authors.initials: M
authors.lastname: Ikarash
authors.forename: Yasuhiro
authors.initials: Y
authors.lastname: Fukuda
authors.forename: Vu Vy
authors.initials: VV
authors.lastname: Huynh
authors.forename: Duc Tan
authors.initials: DT
authors.lastname: Nguyen
authors.forename: Yutaka
authors.initials: Y
authors.lastname: Nakai
mesh_terms: D000822:Animal Husbandry; D000818:Animals; D003457:Cryptosporidiosis / Q000453:epidemiology / Q000473:pathology / Q000662:veterinary*; D003967:Diarrhea / Q000453:epidemiology / Q000469:parasitology / Q000662:veterinary; D005243:Feces / Q000469:parasitology*; D033661:Oocysts; D015995:Prevalence; D012307:Risk Factors; D013552:Swine; D013553:Swine Diseases / Q000453:epidemiology / Q000469:parasitology* / Q000473:pathology; D014744:Vietnam / Q000453:epidemiology