Antimicrobial resistance profile of Salmonella spp. and Listeria monocytogenes isolated from products marketed on the border of Brazil with Argentina and Uruguay.

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Antimicrobial resistance profile of Salmonella spp. and Listeria monocytogenes isolated from products marketed on the border of Brazil with Argentina and Uruguay.

J Food Prot. 2020 Jun 23;:

Authors: Pereira JG, Soares VM, Tadielo LE, Ramires T, da Silva WP

Abstract
We aimed to perform serotyping and the antimicrobial resistance profile of Salmonella spp. and Listeria monocytogenes strains isolated from raw meats imported illegally into Brazil along the borders of Argentina and Uruguay. Distinct isolates of Salmonella spp. (n=6) and L. monocytogenes (n=25) obtained from 270 of these food products of earlier work were serotyped and tested for antimicrobial resistance by agar disc diffusion method. Strains that were considered phenotypically resistant, antimicrobial resistance genes were investigated: s trA, strB, floR, tetA, tetB, blaZ, bla TEM , ermB, ermC, and ereB to Salmonella spp. and blaZ and mecA to L. monocytogenes . All Salmonella spp. isolates were identified as Salmonella Infantis; they were multidrug-resistant (MDR) and harbored the genes bla TEM (n=6), strA (n=1), strB (n=1), floR (n=1), ermB (n=1), tetA (n=3), and tetB (n=3). Listeria monocytogenes isolates belonged to serovars 1/2a (n=1), 1/2b (n=14), 1/2c (n=2), and 4b (n=8), showed resistance only to penicillin G (n=12), and did not show the blaZ and mecA genes. The results demonstrated that illegal foods which are commercialized in the Brazilian international border with Argentina and Uruguay may harbor foodborne pathogens and some of them have multidrug resistance characteristic like Salmonella , emphasizing the need for greater control of international food transit in Brazil, especially in the region evaluated.

PMID: 32574360 [PubMed - as supplied by publisher]