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

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.

[1]  J. Mattsson,et al.  Cryptosporidium infection in herds with and without calf diarrhoeal problems , 2010, Parasitology Research.

[2]  J. Mattsson,et al.  Molecular characterisation of Cryptosporidium isolates from Swedish dairy cattle in relation to age, diarrhoea and region. , 2010, Veterinary parasitology.

[3]  U. Emanuelson,et al.  Prevalence and associated management factors of Cryptosporidium shedding in 50 Swedish dairy herds. , 2009, Preventive veterinary medicine.

[4]  N. Fall.  Health and reproduction in organic and conventional swedish dairy cows , 2009 .

[5]  R. Fayer,et al.  Cryptosporidium ryanae n. sp. (Apicomplexa: Cryptosporidiidae) in cattle (Bos taurus). , 2008, Veterinary parasitology.

[6]  Y. Gröhn,et al.  An observational study on early-lactation metabolic profiles in Swedish organically and conventionally managed dairy cows. , 2008, Journal of dairy science.

[7]  R. Fayer,et al.  Prevalence of Cryptosporidium species and genotypes in mature dairy cattle on farms in eastern United States compared with younger cattle from the same locations. , 2007, Veterinary parasitology.

[8]  R. Fayer,et al.  Wide geographic distribution of Cryptosporidium bovis and the deer-like genotype in bovines. , 2007, Veterinary parasitology.

[9]  H. Vigre,et al.  Molecular and phylogenetic characterization of Cryptosporidium and Giardia from pigs and cattle in Denmark , 2006, Parasitology.

[10]  H. Vigre,et al.  Cryptosporidium and Giardia in different age groups of Danish cattle and pigs--occurrence and management associated risk factors. , 2006, Veterinary parasitology.

[11]  L. Robertson,et al.  Prevalence of Giardia and Cryptosporidium in dairy calves in three areas of Norway. , 2006, Veterinary parasitology.

[12]  N. Cook,et al.  A Tool Box for Assessing Cow , Udder and Teat Hygiene , 2006 .

[13]  R. Fayer,et al.  CRYPTOSPORIDIUM BOVIS N. SP. (APICOMPLEXA: CRYPTOSPORIDIIDAE) IN CATTLE (BOS TAURUS) , 2005, The Journal of parasitology.

[14]  J. Vítovec,et al.  Prevalence and pathogenicity of Cryptosporidium andersoni in one herd of beef cattle. , 2003, Journal of veterinary medicine. B, Infectious diseases and veterinary public health.

[15]  R. Chalmers,et al.  Long-term study of Cryptosporidium prevalence on a lowland farm in the United Kingdom. , 2003, Veterinary parasitology.

[16]  M. Olson,et al.  Prevalence and infection pattern of naturally acquired giardiasis and cryptosporidiosis in range beef calves and their dams. , 2003, Veterinary parasitology.

[17]  J. Höglund,et al.  A field survey on the status of internal parasites in calves on organic dairy farms in southwestern Sweden. , 2001, Veterinary parasitology.

[18]  G. Faubert,et al.  NATURAL TRANSMISSION OF CRYPTOSPORIDIUM PARVUM BETWEEN DAMS AND CALVES ON A DAIRY FARM , 2000, The Journal of parasitology.

[19]  E. Atwill,et al.  Evaluation of periparturient dairy cows and contact surfaces as a reservoir of Cryptosporidium parvum for calfhood infection. , 1998, American journal of veterinary research.

[20]  H. Smith,et al.  An epidemiological study of Cryptosporidium parvum in two herds of adult beef cattle. , 1995, Veterinary parasitology.

[21]  S. J. Ball,et al.  Electron microscopy of Eimeria acervulina macrogametogony and oocyst wall formation , 1984, Parasitology.

[22]  P. E. Wagner,et al.  A Dairy Cow Body Condition Scoring System and Its Relationship to Selected Production Characteristics , 1982 .