Abstract:
The object of the study was to investigate the usefulness of intra – uterine antibiotic therapy at the very first breeding in bovines so as to improve the chances of conception. The experiment was conducted on animals brought for insemination at the artificial insemination centre, Trichur attached to the Kerala Agricultural University, Mannuthy. The animals were divided into two experimental groups and one control group. The first group of 166 cows and 56 heifers was given one vial each of Dicrysticin – S in 30 ml of distilled water after 24 hours of insemination. The second group of 47 cows and 31 heifers was treated with Mastalone – U in the say way. The control group of animals (300) did not receive any treatment either before of after insemination. The conception rate of the animals treated with antibiotics was significantly higher than that in control group. Dicrysticin - S–and Mastalone – U did not show any specific advantage over the other in improving the conception rate. The rate of conception increased on repeating the therapy at the subsequent heat. The overall conception rate in heifers was significantly lower than that in cows. Also the conception rate in dry animals was lower than that of lactating ones.
To sum up, it may be stated that antibiotic infusion of uterus 24 hours after insemination could be considered as a routine measure under field condition for the overall improvement of breeding efficiency in cows.
