Abstract
Multidrug resistant bacteria (MDR bacteria), such as extended spectrum beta-lactamase (ESBL) Enterobacteriaceae, methicillin resistant Staphylococcus aureus (MRSA), and vancomycin-resistant Enterococci (VRE), pose a challenge to the human health care system. In recent years, these MDR bacteria have been detected increasingly outside the hospital environment. Also the contamination of food with MDR bacteria, particularly of meat and meat products, is a concern. The aim of the study was to evaluate the occurrence of MDR bacteria in chicken meat on the Austrian market. For this study, 50 chicken meat samples were analysed. All samples originated from chickens slaughtered in Austrian slaughterhouses and were marked as produced in Austria. Samples were analysed for the presence of ESBL Enterobacteriaceae, methicillin resistant Staphylococci and VRE. Resistance genes of the isolated bacteria were characterised by PCR and sequencing. In the present study 26 ESBL producing E. coli, five mecA gene harbouring Staphylococci (but no MRSA), and four VRE were detected in chicken meat samples of Austrian origin. In 24 (48%) of the samples no ESBL Enterobacteriaceae, MRSA, methicillin resistant coagulase negative Staphylococcus (MRCNS) or VRE could be detected. None of the samples contained all three types of investigated multiresistant bacteria. In concordance to previous studies, CTX-M-1 and SHV-12 were the dominant ESBL genes.
Highlights
The clinically most relevant multidrug resistant (MDR) bacteria are extended spectrum beta-lactamase (ESBL)Enterobacteriaceae and methicillin resistant Staphylococcus aureus (MRSA) and but less prevalently, vancomycin-resistant Enterococci (VRE)
The aim of this study was to investigate the presence of ESBL Enterobacteriaceae, methicillin resistant Staphylococci (MRSA and methicillin resistant coagulase negative Staphylococcus (MRCNS)) and VRE in chicken meat products slaughtered in Austria and the determination of characteristics of the isolated strains
Three different ESBL genes were responsible for (ESBL) resistance in these isolates: Twelve isolates had genes encoding for CTX-M-1 enzyme, twelve for SHV-12 and two for SHV-2
Summary
Enterobacteriaceae and methicillin resistant Staphylococcus aureus (MRSA) and but less prevalently, vancomycin-resistant Enterococci (VRE). These three groups of resistant bacteria are present in the hospital environment, and in farm animals, meat and meat products [1,2,3,4]. The spread of multidrug resistant (MDR) bacteria outside the hospital environment has posed a serious problem over the last few years, and livestock breeding with a rather extensive use of antibiotics has become a possible source for multiresistant bacteria. One possible transmission route for MDR bacteria from animal to human being is food, especially meat and meat products [2,3,5]. Just as with the spread of ESBL in the healthy human population
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