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  • Title: Effect of oral inoculation of Escherichia coli on colostral antibody production in cattle.
    Author: Ward AC, Waldhalm DG, Frank FW, Meinershagen WA, DuBose DA.
    Journal: J Am Vet Med Assoc; 1977 Feb 01; 170(3):340-2. PubMed ID: 319088.
    Abstract:
    Oral inoculation of approximately 1.2 x 10(9) viable Escherichia coli to pregnant cows resulted in increased blood serum and colostral whey titers to the "O" antigen. The antibody titers were more pronounced in colostral whey and were correlated with the inoculum strain of Escherichia coli. There was no correlation between antibody titers of the colostrum ingested and the resulting serum antibody titers of the calves. The incidence of diarrhea in calves did not correlate with the antibody titer in the colostrum. The occurrence of diarrhea was significantly greater in calves that did not ingest colostrum until they were 12 hours old, compared with calves that had free access to their dams and suckled within an hour of birth.
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