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    Wells, B. Thomson, S. Ensor, H. Innes, E.A. and Katzer, F. 2016. Development of a sensitive method to extract and detect low numbers of Cryptosporidium oocysts from adult cattle faecal samples. Veterinary Parasitology, Vol. 227, p. 26.


    Petersen, Heidi H. Jianmin, Wang Katakam, Kiran K. Mejer, Helena Thamsborg, Stig M. Dalsgaard, Anders Olsen, Annette and Enemark, Heidi L. 2015. Cryptosporidium and Giardia in Danish organic pig farms: Seasonal and age-related variation in prevalence, infection intensity and species/genotypes. Veterinary Parasitology, Vol. 214, Issue. 1-2, p. 29.


    Rieux, Anaïs Paraud, Carine Pors, Isabelle and Chartier, Christophe 2014. Molecular characterization of Cryptosporidium isolates from beef calves under one month of age over three successive years in one herd in western France. Veterinary Parasitology, Vol. 202, Issue. 3-4, p. 171.


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

  • C. SILVERLÅS (a1) (a2) and I. BLANCO-PENEDO (a1)
  • DOI: http://dx.doi.org/10.1017/S0950268812000830
  • Published online: 08 May 2012
Abstract
SUMMARY

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.

Copyright
Corresponding author
*Author for correspondence: Dr C. Silverlås, Department of Clinical Sciences, Division of Ruminant Medicine and Veterinary Epidemiology, Swedish University of Agricultural Sciences, P.O. Box 7054, SE-750 07 Uppsala, Sweden. (Email: charlotte.silverlas@slu.se)
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This list contains references from the content that can be linked to their source. For a full set of references and notes please see the PDF or HTML where available.

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16.C Silverlås , Molecular characterisation of cryptosporidium isolates from Swedish dairy cattle in relation to age, diarrhoea and region. Veterinary Parasitology 2010; 169: 289295.

17.N Fall , An observational study on early-lactation metabolic profiles in Swedish organically and conventionally managed dairy cows. Journal of Dairy Science 2008; 91: 39833992.

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24.R Fayer , M Santín , L Xiao . Cryptosporidium bovis n.sp. (Apicomplexa: Cryptosporidiidae) in cattle (Bos taurus). Journal of Parasitology 2005; 91: 624629.

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Epidemiology & Infection
  • ISSN: 0950-2688
  • EISSN: 1469-4409
  • URL: /core/journals/epidemiology-and-infection
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