Advanced search
1 file | 782.07 KB

The role of animal movement, including off-farm rearing of heifers, in the interherd transmission of multidrug-resistant Salmonella

(2009) JOURNAL OF DAIRY SCIENCE. 92(9). p.4229-4238
Author
Organization
Abstract
Fifty-nine commercial dairy farms were sampled 7 times over 15 to 21 mo to determine the role of animal movement, including off-farm rearing of heifers, in the interherd transmission of multidrug-resistant (MDR) Salmonella spp. Farm management data were collected by on-site inspections and questionnaires on herd management practices before and after the study. Forty-four percent (26/59) of herds did not acquire any new MDR Salmonella strains. The number of newly introduced MDR Salmonella strains acquired by the remaining 56% (33/59) of herds ranged from 1 to 8. Logistic regression models indicated that off-farm heifer raising, including contract heifer raising where heifers commingle with cattle from other farms [commingled heifers, odds ratio (OR) = 8.9, 95% confidence interval (CI): 2.4, 32.80], and herd size per 100-animal increment (herd size, OR = 1.04, 95% CI, 1.01, 1.05) were significantly associated with the introduction of new MDR Salmonella strains. The negative binomial regression similarly revealed that commingled heifers [relative risk (RR) = 2.3, 95% CI: 1.1, 4.7], herd size per 100 animals (RR = 1.02, 95% CI, 1.01, 1.03), and a history of clinical salmonellosis diagnosed before the study (RR = 2.5, 95% CI, 1.3, 5.0) were significantly associated with the number of new MDR Salmonella strains that were introduced. Factors not associated with the introduction of new MDR Salmonella strains were housing of heifers and cows in the same close-up pen, a common hospital-maternity pen, and the number of purchased cattle. This study highlights the role of animal movement in the interherd transmission of MDR Salmonella spp.
Keywords
biosecurity, TYPHIMURIUM DT104 INFECTION, Salmonella enterica, dairy herds, UNITED-STATES, RISK-FACTORS, DAIRY HERDS, ANTIMICROBIAL RESISTANCE, CLINICAL SALMONELLOSIS, NONTYPHI SALMONELLA, PACIFIC-NORTHWEST, ENTERICA, CATTLE

Downloads

  • (...).pdf
    • full text
    • |
    • UGent only
    • |
    • PDF
    • |
    • 782.07 KB

Citation

Please use this url to cite or link to this publication:

Chicago
Adhikari, B, TE Besser, JM Gay, LK Fox, MA Davis, RN Cobbold, Anna Berge, and DD Hancock. 2009. “The Role of Animal Movement, Including Off-farm Rearing of Heifers, in the Interherd Transmission of Multidrug-resistant Salmonella.” Journal of Dairy Science 92 (9): 4229–4238.
APA
Adhikari, B, Besser, T., Gay, J., Fox, L., Davis, M., Cobbold, R., Berge, A., et al. (2009). The role of animal movement, including off-farm rearing of heifers, in the interherd transmission of multidrug-resistant Salmonella. JOURNAL OF DAIRY SCIENCE, 92(9), 4229–4238.
Vancouver
1.
Adhikari B, Besser T, Gay J, Fox L, Davis M, Cobbold R, et al. The role of animal movement, including off-farm rearing of heifers, in the interherd transmission of multidrug-resistant Salmonella. JOURNAL OF DAIRY SCIENCE. 2009;92(9):4229–38.
MLA
Adhikari, B et al. “The Role of Animal Movement, Including Off-farm Rearing of Heifers, in the Interherd Transmission of Multidrug-resistant Salmonella.” JOURNAL OF DAIRY SCIENCE 92.9 (2009): 4229–4238. Print.
@article{7261501,
  abstract     = {Fifty-nine commercial dairy farms were sampled 7 times over 15 to 21 mo to determine the role of animal movement, including off-farm rearing of heifers, in the interherd transmission of multidrug-resistant (MDR) Salmonella spp. Farm management data were collected by on-site inspections and questionnaires on herd management practices before and after the study. Forty-four percent (26/59) of herds did not acquire any new MDR Salmonella strains. The number of newly introduced MDR Salmonella strains acquired by the remaining 56\% (33/59) of herds ranged from 1 to 8. Logistic regression models indicated that off-farm heifer raising, including contract heifer raising where heifers commingle with cattle from other farms [commingled heifers, odds ratio (OR) = 8.9, 95\% confidence interval (CI): 2.4, 32.80], and herd size per 100-animal increment (herd size, OR = 1.04, 95\% CI, 1.01, 1.05) were significantly associated with the introduction of new MDR Salmonella strains. The negative binomial regression similarly revealed that commingled heifers [relative risk (RR) = 2.3, 95\% CI: 1.1, 4.7], herd size per 100 animals (RR = 1.02, 95\% CI, 1.01, 1.03), and a history of clinical salmonellosis diagnosed before the study (RR = 2.5, 95\% CI, 1.3, 5.0) were significantly associated with the number of new MDR Salmonella strains that were introduced. Factors not associated with the introduction of new MDR Salmonella strains were housing of heifers and cows in the same close-up pen, a common hospital-maternity pen, and the number of purchased cattle. This study highlights the role of animal movement in the interherd transmission of MDR Salmonella spp.},
  author       = {Adhikari, B and Besser, TE and Gay, JM and Fox, LK and Davis, MA and Cobbold, RN and Berge, Anna and Hancock, DD},
  issn         = {0022-0302},
  journal      = {JOURNAL OF DAIRY SCIENCE},
  language     = {eng},
  number       = {9},
  pages        = {4229--4238},
  title        = {The role of animal movement, including off-farm rearing of heifers, in the interherd transmission of multidrug-resistant Salmonella},
  url          = {http://dx.doi.org/10.3168/jds.2008-1494},
  volume       = {92},
  year         = {2009},
}

Altmetric
View in Altmetric
Web of Science
Times cited: