Effect of administration of vitamin E, selenium and antimicrobial therapy on incidence of mastitis, productive and reproductive performances in dairy cows

Publication date: Available online 10 December 2016 Source:International Journal of Veterinary Science and Medicine Author(s): M.N. Hoque, Z.C. Das, A.N.M.A. Rahman, M.M. Hoque Administration of vitamin, mineral and antimicrobials at the end of lactation plays potential role in preventing mastitis in dairy cows. A total of 255 cows dividing into five groups (A=50, B=50, C=50, D=50 and E=55) at their late gestation period were selected to explore the effect of vitamin E, selenium and antimicrobial therapy on mastitis incidence, their productive and reproductive performances. Each cow of group A received α-tocopherol+sodium selenite orally daily for last 30days before calving, while each cow of group B, C and D was treated with α-tocopherol+sodium selenite intramuscular injection, procaine penicillin+neomycin sulfate, and dicloxacillin sodium intramammary infusions at Day 30–20 before calving, respectively. Group E cows served as untreated control. California mastitis test (CMT) revealed that 70.0%, 76.0%, 84.0% and 100.0% cows in group A, B, C and D, respectively were free from new intramammary infections (IMIs) during early lactation period. The bacteriological results showed highest IMIs rates (76.3%) in group E and lowest IMIs (2.0%) in group D (P <0.05). Staphylococcus aureus and Escherichia coli were the most predominant udder pathogens in all groups except group D (only CNS). The mean IMIs incidence (20.5%) was significantly lower in treated cows (P &...
Source: International Journal of Veterinary Science and Medicine - Category: Veterinary Research Source Type: research