Resistance to extended-spectrum β-lactamases in Salmonella from a broiler supply Chain.
The prevalence of extended-spectrum β-lactamase (ESBL)-producing Enterobacteriaceae varies worldwide, however, the incidence of ESBL-producing environmental Salmonella isolates is increasing. Salmonella is still one of the most important pathogens that occur in the poultry supply chain. Therefore, this study analyzed the susceptibility of Salmonella isolates collected from a poultry supply chain to β-lactam antibiotics, and examined the phenotypes of the isolates based on enzyme-inducible AmpC β-lactamase analysis. All analysis of the putative positive isolates in the current study confirmed that 27.02% (77/285 analysis) of all ESBL tests realized with the isolates produced a profile of resistance consistent with β-lactamase production. All isolates of S. Minnesota serotype had ESBL phenotype. Aztreonam resistance was the least common amongst the Salmonella isolates, followed by ceftazidime. The presence of inducible chromosomal ESBL was detected in 14 different isolates of the 19 serotypes investigated. These results are very indicatives of the presence of ESBL genes in Salmonella isolates from a broiler supply chain, reaffirming the growing global problem of ESBL resistance.
Graduate Program in Science and Biotechnology, University of West of Santa Catarina-UNOESC, Videira 89.560-000, Brazil. jane.gelinski@unoesc.edu.br.
Jane Mary Lafayette Neves
JM
Gelinski
Graduate Program in Microbiology, Parasitology, and Immunology, Federal University of Paraná-UFPR, Curitiba 80.060-000, Brazil. amandabombassaro@hotmail.com.
Amanda
A
Bombassaro
Graduate Program in Science and Biotechnology, University of West of Santa Catarina-UNOESC, Videira 89.560-000, Brazil. cesar.baratto@unoesc.edu.br.
César Milton
CM
Baratto
Graduate Program in Microbiology, Parasitology, and Immunology, Federal University of Paraná-UFPR, Curitiba 80.060-000, Brazil. vaniava63@gmail.com.
Vânia Aparecida
VA
Vicente
D000818:Animals; D000900:Anti-Bacterial Agents / Q000494:pharmacology*; D001426:Bacterial Proteins / Q000494:pharmacology*; D001938:Brazil / Q000453:epidemiology; D002645:Chickens; D024901:Drug Resistance, Multiple, Bacterial; D008826:Microbial Sensitivity Tests / Q000662:veterinary; D011201:Poultry Diseases / Q000453:epidemiology* / Q000382:microbiology; D015995:Prevalence; D012475:Salmonella / Q000187:drug effects*; D012481:Salmonella Infections, Animal / Q000453:epidemiology* / Q000382:microbiology; D001618:beta-Lactamases / Q000494:pharmacology*
D000900:Anti-Bacterial Agents; D001426:Bacterial Proteins; C048795:AmpC beta-lactamases; D001618:beta-Lactamases