Cryptosporidium spp. in calves and cows from organic and conventional dairy herds

Epidemiology and Infection
C Silverlås, I Blanco-Penedo

Abstract

A cohort study was performed to investigate cryptosporidial prevalence and species distribution in 13 organic and 13 conventional dairy herds. Faecal samples were collected from 221 calves and 259 cows. Management routines were recorded at farm inspection and through a questionnaire. Samples were concentrated using sodium chloride flotation and cryptosporidial oocysts were detected by epifluorescence microscopy. Molecular analysis was used to determine species and subtypes. A multivariable model for factors associated with calves being Cryptosporidium spp. positive was built. Cryptosporidium spp.-positive animals were identified in all herds. Prevalences were similar in organic and conventional calves (44·7% vs. 52·3%), as well as in cows (3·1% vs. 3·8%), P > 0·05. Cryptosporidium bovis, C. ryanae and C. parvum were identified. C. ryanae was identified in a calf younger than the described prepatent period. The multivariable model included four significant variables; calf age, cleanliness of bedding, cleaning routines for group pens and farmers' attitudes towards biosecurity.

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Citations

Jan 31, 2015·Epidemiology and Infection·P KinrossM Löfdahl
Jun 28, 2017·Environmental Science & Technology·Lucie C VermeulenNynke Hofstra
Aug 2, 2018·Journal of Water and Health·Ekaterina SokolovaKaisa Sörén
Jun 22, 2016·Neurogastroenterology and Motility : the Official Journal of the European Gastrointestinal Motility Society·S S KhayyatzadehP Adibi
Jan 7, 2021·Transboundary and Emerging Diseases·Zhenjie ZhangYaoyu Feng
Jan 28, 2021·Animals : an Open Access Journal From MDPI·Pablo DíazPatrocinio Morrondo
May 9, 2021·Acta Tropica·Firas AlaliNawal Hijjawi
May 11, 2021·Infection, Genetics and Evolution : Journal of Molecular Epidemiology and Evolutionary Genetics in Infectious Diseases·Ioana BujilaJessica Beser
Apr 7, 2019·Veterinary Parasitology: X·Malin ÅbergCamilla Björkman
May 26, 2020·Veterinary Parasitology : Regional Studies and Reports·Malin ÅbergCamilla Björkman

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