Management practices associated with the rate of respiratory tract disease among preweaned beef calves in cow-calf operations in the United States

Management practices associated with the rate of respiratory tract disease among preweaned beef calves in cow-calf operations in the United States

Objective-To assess associations between herd management practices and herd-level rates of bovine respiratory disease complex (BRDC) in preweaned beef calves in US cow-calf operations. Design-Cross-sectional survey. Sample-443 herds weighted to represent the US cow-calf population. Procedures-Produc...

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Bibliographic Details
Published in:Journal of the American Veterinary Medical Association Vol. 242; no. 9; pp. 1271 - 1278
Main Authors: Hanzileck, Gregg A, Renter, David R, White, Brad J, Wagner, Bruce A, Dargatz, David A, Sanderson, Michael W, Scott, H. Morgan, Larson, Robert E
Format: Journal Article
Language:English
Published: United States American Veterinary Medical Association 01-05-2013
Subjects:
Animal Husbandry - methods
Animals
anthropogenic activities
antimicrobial agents
beef
beef cows
bovine respiratory disease
calves
Cattle
Cattle Diseases - epidemiology
Commerce
confidence interval
cow-calf operations
Cross-Sectional Studies
crossing
disease incidence
disease prevalence
disease surveillance
disease transmission
feed supplements
Female
heifers
herds
income
multivariate analysis
production technology
regression analysis
respiratory tract diseases
Respiratory Tract Diseases - pathology
Respiratory Tract Diseases - veterinary
steers
surveys
United States - epidemiology
United States
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Summary:Objective-To assess associations between herd management practices and herd-level rates of bovine respiratory disease complex (BRDC) in preweaned beef calves in US cow-calf operations. Design-Cross-sectional survey. Sample-443 herds weighted to represent the US cow-calf population. Procedures-Producers from 24 states were selected to participate in a 2-phase survey; 443 producers completed both survey phases and had calves born alive during the study period. Data from those respondents underwent multivariable negative binomial regression analyses. Results-Bred heifer importation was associated with lower BRDC rates (incidence rate ratio [IRR], 0.40; confidence interval [CI], 0.19 to 0.82), whereas weaned steer importation was associated with higher BRDC rates (IRR, 2.62; CI, 1.15 to 5.97). Compared with single-breed herds, operations with calves of 2-breed crosses (IRR, 2.36; CI, 1.30 to 4.29) or 3-breed crosses (IRR, 4.00; CI, 1.93 to 8.31) or composite-herd calves (IRR, 2.27; CI, 1.00 to 5.16) had higher BRDC rates. Operations classified as supplemental sources of income had lower BRDC rates (IRR, 0.48; CI, 0.26 to 0.87) than did operations classified as primary sources of income. Reported feed supplementation with antimicrobials was positively associated with BRDC rates (IRR, 3.46; CI, 1.39 to 8.60). The reported number of visits by outsiders in an average month also was significantly associated with herd-level BRDC rates, but the magnitude and direction of the effects varied. Conclusions and Clinical Relevance-Management practices associated with preweaning BRDC rates may be potential indicators or predictors of preweaning BRDC rates in cow-calf production systems.
Bibliography:http://handle.nal.usda.gov/10113/56431
http://dx.doi.org/10.2460/javma.242.9.1271
ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:0003-1488
1943-569X
DOI:10.2460/javma.242.9.1271