Managerial determinants of intramammary coliform and ...



Title Managerial determinants of intramammary coliform and environmental streptococci infections in Ohio dairy herds
Author(s) P. C. Bartlett, G. Y. Miller, S. E. Lance, Lawrence E. Heider
Journal Journal of Dairy Science
Date 1992
Volume 75
Issue 5
Start page 1241
End page 1252
Abstract Forty-eight dairy herds in Ohio were selected as a stratified random sample for participation in a disease monitoring study to relate the prevalence of IMI with coliform and environmental streptococci to herd management and environmental conditions. Management and environmental conditions were assessed by farm inspection and by an interview with the dairy producers. A separate analysis for each independent variable identified many potential disease determinants. A multivariable analysis of a covariance model to predict the prevalence of coliforms had 6 model df (R2 = .47). Increased prevalence of coliform infection was associated with an increased amount of milk remaining in the udder after milking, use of free stalls, regular use of a running water wash, increased person hours per cow spent milking, and poor sanitation. The multivariable model for environmental streptococci used 5 model df (R2 = .51). Increased prevalence of environmental streptococci was associated with poor sanitation, increased number of days dry, use of tie stalls, no use of a shared wash cloth, and no use of an individual dry cloth.

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