Caracterização da sensibilidade das bactérias causadoras de mastite bovina e sua sensibilidade ao pré-dipping, no município de Realeza - Paraná

Abstract

Milk production in Brazil is extremely important for the economy, however, mastitis has been an obstacle to this economy. To prevent mastitis, sanitary measures such as the use of disinfectants in pre-dipping order management are important and appropriate treatment involves the use of antibiotics. The research was carried out in partnership with the Federal University of Fronteira Sul (UFFS), the Tutorial Education Program (PET) Veterinary Medicine/Family Agriculture UFFS and the Institute of Rural Development of Paraná (IDR Paraná - EMATER - IAPAR). The antibiogram was carried out with milk samples from family farming properties in the city of Realeza, Paraná. The pre-dipping sensitivity test was performed with a commercial product. The results of antibiogram showed that of the 24 S. aureus samples, 66.7% were resistant to bacitracin, 41.6% to erythromycin and 20.8% to enrofloxacin. Streptococcus agalactiae/dysgalactiae with 54.5% of the samples resistant to tetracycline and enrofloxacin and 63.6% to ampicillin and penicillin G. Streptococcus uberis showed resistance only to tetracycline in 50% of the samples. Enterococcus spp showed 100% resistance to antimicrobials, except ampicillin and ciprofloxacin. The results obtained highlighted the possibility of treating mastitis with four of the 11 active ingredients tested: oxacillin, tetracycline, enrofloxacin, bacitracin, sulfazotrim, ampicillin, penicillin G, cephalexin, gentamicin, ciprofloxacin and streptomycin. The commercial product was not 100% effective against Staphylococcus aureus and Streptococcus agalactiae/dysgalactiae.