Type

Journal Article

Authors

Riona Sayers
L. O'Grady
Donagh P. Berry
Eugene O'Doherty

Subjects

Veterinary

Topics
questionnaires neospora abortion veterinary classification leptospira interrogans serovar hardjo salmonella cattle diseases milk logistic regression antibodies bacterial neospora caninum pregnancy female cattle leptospira interrogans male dogs logistic models irish dairy blood epidemiology ireland risk factors surveys and questionnaires isolation purification dairy herds animals microbiology

Management practices as risk factors for the presence of bulk milk antibodies to Salmonella, Neospora caninum and Leptospira interrogans serovar hardjo in Irish dairy herds (2014)

Abstract A survey of management practices in 309 Irish dairy herds was used to identify risk factors for the presence of antibodies to Salmonella, Neospora caninum and Leptospira interrogans serovar hardjo in extensively managed unvaccinated dairy herds. A previous study documented a herd-level seroprevalence in bulk milk of 49%, 19% and 86% for Salmonella, Neospora caninum and leptospira interrogans serovar hardjo, respectively in the unvaccinated proportion of these 309 herds in 2009. Association analyses in the present study were carried out using multiple logistic regression models. Herds where cattle were purchased or introduced had a greater likelihood of being positive to leptospira interrogans serovar hardjo (P<0.01) and Salmonella (P<0.01). Larger herds had a greater likelihood of recording a positive bulk milk antibody result to leptospira interrogans serovar hardjo (P<0.05). Herds that practiced year round calving were more likely to be positive to Neospora caninum (P<0.05) compared to herds with a spring-calving season, with no difference in risk between herds that practiced split calving compared to herds that practiced spring calving. No association was found between presence of dogs on farms and prevalence of Neospora caninum possibly due to limited access of dogs to infected materials including afterbirths. The information from this study will assist in the design of suitable control programmes for the diseases under investigation in pasture-based livestock systems.
Collections Ireland -> Teagasc -> Animal & Bioscience
Ireland -> Teagasc -> Animal & Bioscience
Ireland -> Teagasc -> Animal & Grassland Research & Innovation Programme
Ireland -> Teagasc -> Animal & Grassland Research & Innovation Programme

Full list of authors on original publication

Riona Sayers, L. O'Grady, Donagh P. Berry, Eugene O'Doherty

Experts in our system

1
Riona Sayers
Teagasc
Total Publications: 56
 
2
Luke O'Grady
University College Dublin
Total Publications: 54
 
3
D P Berry
Teagasc
Total Publications: 243