Uso do antibiograma na detecção de resistência bacteriana em amostras de leite

Abstract

Milk quality control is an important factor to consolidate dairy industry. Mastitis is an inflammatory process of the mammary gland that affects dairy herds causing milk losses, such as quality reduction. Antibiotic therapy is one of the most common treatment used to control mastitis milk losses. Objectives of the current study were to evaluate the antimicrobial susceptibility of milk samples collected from dairy herds located in north Minas Gerais state. Milk samples were transfered to 5% sheep blood agar and incubated at 37°C for 24 hours. Bacteria colonies growth was observed after incubation. Antimicrobial susceptibility in vitro tests were carried out using agar diffusion technique. Statistical analyses were conducted using R software version 3.5.0 by Qui-square test. As a result, Ampicillin and Cephalexin have shown more sensibility than others tested antibiotics, 62% and 31% of resistance, respectively. The knowledge about bacterial resistance is important, once it can leads to a serious problems in public health and causes damages to dairy industry and milk products consumers.