Antimicrobial resistance profiles of listeria monocytogenes and listeria innocua isolated from ready-to-eat products of animal origin in Spain

Escolar, C. ; Gómez, D. ; Rota García, M.C. (Universidad de Zaragoza) ; Conchello, P. (Universidad de Zaragoza) ; Herrera, A. (Universidad de Zaragoza)

Resumen: The objective of this work was to investigate the antimicrobial resistance in Listeria spp. isolated from food of animal origin. A total of 50 Listeria strains isolated from meat and dairy products, consisting of 7 Listeria monocytogenes and 43 Listeria innocua strains, were characterized for antimicrobial susceptibility against nine antimicrobials. The strains were screened by real-time PCR for the presence of antimicrobial resistance genes: Tet M, tet L, mef A, msr A, erm A, erm B, lnu A, and lnu B. Multidrug resistance was identified in 27 Listeria strains, 4 belonging to L. monocytogenes. Resistance to clindamycin was the most common resistance phenotype and was identified in 45 Listeria strains; the mechanisms of resistance are still unknown. A medium prevalence of resistance to tetracycline (15 and 9 resistant and intermediate strains) and ciprofloxacin (13 resistant strains) was also found. Tet M was detected in Listeria strains with reduced susceptibility to tetracycline, providing evidence that both L. innocua and L. monocytogenes displayed acquired resistance. The presence of antimicrobial resistance genes in L. innocua and L. monocytogenes indicates that these genes may be transferred to commensal and pathogenic bacteria via the food chain; besides this, antibiotic resistance in L. monocytogenes could compromise the effective treatment of listeriosis in humans.

Idioma: Inglés

DOI: 10.1089/fpd.2016.2248

Año: 2017

Publicado en: Foodborne Pathogens and Disease 14, 6 (2017), 357-363
ISSN: 1535-3141

Factor impacto JCR: 2.476 (2017)

Categ. JCR: FOOD SCIENCE & TECHNOLOGY rank: 38 / 133 = 0.286 (2017) - Q2 - T1

Factor impacto SCIMAGO: 1.063 - Animal Science and Zoology (Q1) - Applied Microbiology and Biotechnology (Q1) - Food Science (Q1) - Microbiology (Q2)

Financiación: info:eu-repo/grantAgreement/ES/DGA/A01
Financiación: info:eu-repo/grantAgreement/ES/MINECO/AGL2014-51742-REDC

Tipo y forma: Article (Published version)

Área (Departamento): Área Nutrición Bromatología (Dpto. Produc.Animal Cienc.Ali.)