Salmonella spp. virulent and resistant multidrug recovered from chicken carcasses in Brazil

Abstract

The aim of this study was to evaluate the biofilm production, the susceptibility profile and the detection of resistance genes present in Salmonella spp isolates from fresh chicken carcasses sold in a Brazilian metropolis. From a total of 61 samples of fresh poultry carcasses, 21 were positive for the presence of Salmonella spp. Regarding the antimicrobial susceptibility test, (13/21) isolates tested were resistant to at least one antibiotic, corresponding to 61.9%, and 38% (08/21) were Resistant to Multiple Drugs. At least two resistance genes were identified in all isolates, especially the genes related to β-lactamases and Quinolones resistance. It was also observed that some Salmonella spp isolates showed identical genetic patterns. And all 21 isolates were able to form biofilm. The identification of Salmonella spp. biofilm forming and carrying different β-lactamase genes and determinants of resistance to quinolones demonstrates the capacity of these bacteria to accumulate various mechanisms of virulence and resistance to antimicrobials. Therefore, the spread of different clonal groups of Salmonella spp. MDR in poultry meat carcasses expressed in this attest to the need for effective controls to contain this microorganism, which besides being a risk to public health, is also responsible for considerable economic losses.