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

2022-01-17

Número

Sección

Ciencias Agrarias y Biológicas

Cómo citar

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://www.rsdjournal.org/rsd/article/view/25280. Acesso em: 13 dec. 2025.