Caracterización de sobrenadantes inhidores producidos por bactérias aisladas de la leche de cabra

Autores/as

DOI:

https://doi.org/10.33448/rsd-v11i2.25280

Palabras clave:

Leche cruda de cabra; Bacterias de ácido láctico; Péptido antimicrobiano; Biopreservación.

Resumen

Las bacterias del ácido láctico (LAB) aisladas de la leche pueden producir varios compuestos, como las bacteriocinas, pequeños péptidos catiónicos y termoestables, que tienen actividad antimicrobiana. La aplicación tecnológica de estos compuestos antimicrobianos se ha vuelto importante para la industria principalmente debido a los conservantes químicos. Este estudio tuvo como objetivo aislar LAB con actividad anti-Listeria monocytogenes de leche cruda de cabra y caracterizar sus sobrenadantes inhibidores libres de células (CFS). Aislamiento de LAB a partir de leche cruda de cabra, actividad inhibidora del CFS, caracterización de la actividad inhibidora del CFS en diferentes condiciones, modo de acción del CFS activo, adsorción de sustancias anti-Listeria presentes en el CFS de LS2 a L. monocytogenes, se realizó la identificación de aislados de LAB con actividad anti-Listeria. Tres cepas aisladas produjeron CFS con sustancias inhibidoras activas de naturaleza proteica, identificadas por rDNA 16s como Weissella cibaria (LS1) y Lactococcus lactis (LS2 y LS3). LS2 CFS tuvo la mayor actividad anti-Listeria (1600 unidades arbitrarias/ ml) después de 2 ha pH 6.0 y fue bacteriostático y activo a pH bajo a temperaturas de 4 °C a 80 °C. Los resultados sugieren que la cepa LS2 es un cultivo bioconservante con potencial para aplicaciones en el control de L. monocytogenes en alimentos.

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Publicado

17/01/2022

Cómo citar

SILVA, L. A. da .; RAPOSO, A. E. S. .; LOPES NETO, J. H. P.; OLIVEIRA, K. de S.; SOUZA, E. L.; FRANCO, O. L.; CARDARELLI, H. R. Caracterización de sobrenadantes inhidores producidos por bactérias aisladas de la leche de cabra. Research, Society and Development, [S. l.], v. 11, n. 2, p. e2111225280, 2022. DOI: 10.33448/rsd-v11i2.25280. Disponível em: https://rsdjournal.org/index.php/rsd/article/view/25280. Acesso em: 22 dic. 2024.

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Sección

Ciencias Agrarias y Biológicas