Relationship between serologic recognition of Escherichia coli 0111:B4 (J5) and clinical coliform mastitis in cattle
Open Access
- 1 November 1988
- journal article
- Published by American Veterinary Medical Association (AVMA) in American Journal of Veterinary Research
- Vol. 49 (11) , 1950-1954
- https://doi.org/10.2460/ajvr.1988.49.11.1950
Abstract
SUMMARY: Serum IgG1 elisa titers recognizing gram-negative core antigens (Escherichia coli [J5]) were studied at a large dairy in central California. Population mean log10 titer was 2.7357 (equivalent to 1:544) with a se of 0.03843. Titers increased with increased lactation number (unstandardized regression coefficient = 0.06733). Changes in lactation number accounted for only 6.77% of titer variation. Titers < 1:240 were associated with 5.33 times the risk of clinical coliform mastitis. Also, older cattle were at greater risk to develop clinical coliform mastitis. These factors apparently affect incidence in a nonlinear fashion, with greatly increased risk associated with titers < 1:240 and with fourth or greater lactations.This publication has 0 references indexed in Scilit: