Use of ceftiofur in lactating cows and their milk excretion

Abstract

The presence of antibiotic residues in milk can have adverse effects on public health, and damage to the dairy industry. The aim of this study was to verify the positivity of samples of milk after intramuscular administration of the antibiotic ceftiofur in dose 1-2 mg / kg recommended by the manufacturer. Six lactating females, divided into two groups, high and low productivity, received intramuscular treatment with the antibiotic at the specified dose. Were analyzed the expressed milk after a period of 12 and 24 hours after drug administration, using the SNAP®-Idexx kits and CHARM®-Charm Sciences Inc. The milk obtained from milking after 12 hours was positive for all females, and 24 hours after milking was not found antibiotic residue in any of them. The results indicate that, despite appointee of the drug did not determine a grace period for consumption of milk from animals treated showed a positive reaction in milk 12 hours after administration. This shows the need for standardization among the methods for detecting residues in milk and the Brazilian legislation, as well as provides grace periods for veterinary medicines and increase the oversight of products offered on the market.