ANTIBIOTIC RESISTANCE OF ENTEROBACTERIACEAE GENERA AND SALMONELLA SPP., SALMONELLA ENTERICA SER. TYPHIMURIUM AND ENTERITIDIS ISOLATED FROM MILK, CHEESE AND OTHER DAIRY PRODUCTS FROM CONVENTIONAL FARM IN SLOVAKIA

Abstract

Antibiotic resistance was investigated in 67 samples of Enterobacteriaceae genera isolates from milk, cheese and other dairy products in this work. The samples were obtained from conventional farms in Slovakia. Four samples of isolates were positive for Salmonella spp., Salmonella enterica ser. typhimurium and enteritidis. A great proportion of resistant strain from Enterobacteriaceae genera was found. There was detected a high resistance in milk samples to ampicillin (57.14%), to streptomycin and tetracycline (14.28%), to chloramphenicol (9.52%). Bacteria from the cheese samples were resistant to ampicillin (84.0%), to tetracycline (24.0%). In the samples of other dairy products was found resistance to ampicillin (66.66%), to tetracycline (52.38%) and to streptomycin (14.28%). Among all samples observed, it was found resistance to ampicillin (69.26%), tetracycline (30.22%), streptomycin (9.52%) and to chloramphenicol (3.17%). Resistance to other antibiotics was not detected. From all observed samples we detected Salmonella spp. in 5.97 %, Salmonella spp. was found in dairy samples in 19.04 %. Antibiotic resistance was investigated in 13 colonies of Salmonella spp. as well. The highest resistance was to tetracycline (30.76 %), ampicillin and tigecycline (23.07 %), to piperacillin (15.38 %) and chloramphenicol (7.69 %). Resistance to the other monitored antibiotics was not detected. High number of antibiotic resistant Enterobacteriaceae genera and Salmonella spp. was found in milk, cheese and other dairy products from conventional breeding and it is indicating the need for prudent drugs using to diminish development and to avoid spread of antibiotic resistance.