[Dynamics of agglutinins following vaccination against coli-bacteriosis in calves].

A bivalent vaccine, produced with strains Escherichia coli 078 and 0117 to control colibacteriosis in calves, was used to vaccinate experimentally 20 cows following up the agglutinin dynamics in the serum of calves born later on. It was found that the agglutinin titers of the 0 antibodies were lower than those of OK, and varied within the range of from 1:10 to 1:320, the titers of 1:20-1:40 values being prevalent. Highest level of titers was observed by the third day following birth. OK antibodies had titers that were 1-2 degrees higher, reaching their peak level as early as the 12-15 hour after birth. They persisted for a longer period in the blood serum of calves. The antibodies produced after vaccination were shown to be sensitive to 2-mercaptoethanol.