Abstract
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 less than 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 less than 1:240 and with fourth or greater lactations.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 1950-1954 |
| Number of pages | 5 |
| Journal | American Journal of Veterinary Research |
| Volume | 49 |
| Issue number | 11 |
| State | Published - Nov 1988 |
ASJC Scopus subject areas
- veterinary(all)
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Tyler, J. W., Cullor, J. S., Osburn, B., Bushnell, R. B., & Fenwick, B. W. (1988). Relationship between serologic recognition of Escherichia coli 0111: B4 (J5) and clinical coliform mastitis in cattle. American Journal of Veterinary Research, 49(11), 1950-1954.