Oral and Poster Abstracts

The level of antibodies produced in colostrum following injection of
the trivalent Rota-corona virus and E. coli vaccine was evaluated to
understand the prophylaxic effect of vaccine against calf diarrhea. The
number of 46 pregnant cows from industrial dairy herd were selected.
A 5 mls trivalent Rota-corona virus and E. coli vaccine was injected
subcutaneousely in 7 months pregnant cows. After parturition a 50 mls
colostrums was collected and evaluated for antibodies using
compatative ELISA method and commercial kit of Rota-corona virus
and E. coli (Bio X, Belgium). Meanwhile, 27 pregnant cows which
have not vaccinated were used as control group. From out of 46
vaccinated cows, antibodies against E. coli was detected in 33 cases
(71.7%) including one positive were 4 cases (8.7%), two positive were
28 cases (60.9%) and four positive was one case (3.1%). In control
group 23 cases were negative (85.2%) and one positive were 3 cases
(11.1%) and two positive was one case (3.7%). From out of 46
vaccinated cows, antibodies against rota virus were detected in all
samples (100%) including one positive were 3 cases (6.5%), two
positive were 43 cases (93.5%). For corona virus one positive were 9
cases (19.5%) two positive were 34 cases (73.9%) and 3 positive were
3 cases (6.5%). All control group for rota and corona antibodies were
two positive. The highest and lowest inhibition percent in vaccinated
cows for E. coli antibody were 85% and 1%, rotavirus were 59% and
20% and corona virus were 61% and 20%, respectively. Chi-Square
test shows significant difference (P