Detection of Listeria innocua in the dairy processing chain: resistance to antibiotics and essential oils

Nenhuma Miniatura disponível

Data

2022-01-01

Autores

da ROSA, Mayara Cardoso
Iacuzio, Raiza
Barbosa, Giovana Rueda
Pereira, Rodrigo de Castro Lisboa
Cruzado-Bravo, Melina
Rall, Vera Lucia Mores [UNESP]
Vallim, Deyse Christina
Silva, Nathália Cristina Cirone

Título da Revista

ISSN da Revista

Título de Volume

Editor

Resumo

Listeria monocytogenes is a food pathogen responsible for many foodborne disease outbreaks. Listeria innocua is similar to L. monocytogenes, could be considered biologically similar to L. monocytogenes and could be used to predict its behavior. The aims of this work were to isolate Listeria spp. in dairy processing plants, perform genotypic characterization of virulence, evaluate the antimicrobial resistance profile, and verify the sensitivity of the strains to essential oils. Sampling was held in six dairy processing plants in the region of Campinas, Brazil. Seventeen Listeria innocua strains were isolated, all negative for virulence genes inlA, inlB, inlC, inlJ, actA, plcA, and plcB. The strains were resistant to kanamycin (5.9%), penicillin (11.8%), ampicillin (11.8%), cefoxitin (58.8%), clindamycin (76.50%) and oxacillin (100%). The susceptibility of the strains to commercial essential oils (Rosemarinus officinalis, Cymbopogon citratus, Eucalyptus citirodora, Mentha piperita, Piper nigrum, Vetiveria zizanioides, Cymbopogon nardus, Cymbopogon martinii and Pogostemon cablin) was evaluated by Minimum Inhibitory Concentration (MIC) test. The results showed Cymbopogon citratus, Cymbopogon martini, Cymbopogon nardus and Mentha piperita oils were most efficient. The resistance of Listeria innocua isolated in dairy processing plants is worrisome, and the use of essential oils could be an alternative for development of new drugs and products.

Descrição

Palavras-chave

dairy, food processing, food safety, Listeria infection, resistance

Como citar

Food Science and Technology (Brazil), v. 42.