Effect Of Antibiotic Treatment On Pregnancy Rate In Repeat Breeder Gir Cows

Abstract

The study was aimed to evaluate the effect of intrauterine and parenteral antibiotic treatment on conception rate in repeat breeder Gir cows. In all 36 pluriparous Gir cows (24 repeat breeders not conceived even after 3-5 regular quality AIs, and 12 normal cyclic postpartum cows) were assigned into three groups. Repeat breeder cows were treated once with either Gentamicin (100 mg) intrauterine (10 ml diluted with 10 ml distilled water) 1 hour before insemination (Group I; n = 12) or with Ceftiofur (Bovicef, 1 g) intramuscularly @ 2.2 mg/kg body weight at the time of insemination (Group II; n = 12), while normal cyclic cows served as untreated (non-repeat breeder) Controls (Group III: n = 12). The cows in oestrus were inseminated with good quality frozen-thawed semen at least for two cycles post-treatment if not settled. Conception rates were better with Gentamicin at first and second service in repeat breeders. The overall pregnancy rates after three services among three groups (83, 67 and 58 %, respectively) also differed significantly (P<0.05). In conclusion, the pregnancy rates could be improved by treatment with Gentamicin and Ceftiofur in repeat breeder Gir cows.