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Characterization of Salmonella enterica Contamination in Pork and Poultry Meat from Sao Paulo/Brazil: Serotypes, Genotypes and Antimicrobial Resistance Profiles

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Author(s):
Gomes, Vasco T. M. ; Moreno, Luisa Z. ; Silva, Ana Paula S. ; Thakur, Siddhartha ; La Ragione, Roberto M. ; Mather, Alison E. ; Moreno, Andrea M.
Total Authors: 7
Document type: Journal article
Source: PATHOGENS; v. 11, n. 3, p. 13-pg., 2022-03-01.
Abstract

Salmonellosis is a zoonosis of major relevance to global public health. Here we present the assessment of Salmonella enterica contamination in pork and poultry meat sold at retail markets in Sao Paulo, Brazil. A total of 780 meat samples (386 poultry meat and 394 pork samples) were collected from 132 markets. From these, 57 samples (7.3%) were positive for S. enterica isolation, including 32 (8.3%) poultry meat and 25 (6.3%) pork samples. S. enterica isolates were further characterized for serotyping, antimicrobial resistance and genotyping by amplified fragment length polymorphism and pulsed field gel electrophoresis. Antimicrobial resistance analysis demonstrated two main profiles: pork isolates were more resistant to macrolides, beta-lactams, tetracycline, phenicols, and fluoroquinolones, and poultry meat isolates presented higher resistance to fluoroquinolones, sulfonamides, tetracycline, and beta-lactams. A total of 72.4% of poultry meat isolates were identified as S. Heidelberg, while most of pork isolates were S. Typhimurium (31.7%) and S. Give (16.7%). Genotyping resulted in most clusters consisting exclusively of pork or poultry meat, no crosscontamination was detected, and a tendency to differentiate isolates according to their serotypes and markets of origin. High resistance rates to critically important antimicrobials reinforce the importance of controlling Salmonella contamination in meat production chains. (AU)

FAPESP's process: 16/25745-7 - Virulence assessment and phenotypic and genomic characterization of Corynebacterium spp. isolated from sow's urinary tract infection
Grantee:Luisa Zanolli Moreno
Support Opportunities: Scholarships in Brazil - Post-Doctoral
FAPESP's process: 18/21216-5 - Drivers and dynamics of antimicrobial resistance and Salmonella in Brazilian pig and poultry production
Grantee:Andrea Micke Moreno
Support Opportunities: Regular Research Grants
FAPESP's process: 13/16946-0 - Phenotypic and genotypic characterization of strains of Salmonella enterica isolated from pork in São Paulo.
Grantee:Vasco Túlio de Moura Gomes
Support Opportunities: Scholarships in Brazil - Doctorate
FAPESP's process: 17/50453-2 - Antimicrobial resistance in Brazilian pig and poultry production and its contribution to the success of Salmonella serotypes
Grantee:Andrea Micke Moreno
Support Opportunities: Regular Research Grants