Caracterización fenotípica y genotípica de Staphylococcus aureus aislado de salchicha porcina

Autores/as

DOI:

https://doi.org/10.33448/rsd-v10i2.12041

Palabras clave:

Biopelícula; Enterotoxinas; Meticilina; Salud pública; Estrés subletal.

Resumen

El objetivo de este estudio fue caracterizar el genotipo y fenotipo de S. aureus aislado de salchicha porcina. Se recolectaron 50 muestras de salchicha porcina, se realizaron recuentos positivos de Staphyloccus coagulasa positivo y se obtuvieron aislamientos para identificar la especie S. aureus. En los aislamientos se investigó la presencia de los genes sea, seb, sec y sed, se evaluó la resistencia a la meticilina y se probó la producción de biopelículas en Agar Rojo Congo, acero inoxidable, polietileno, vidrio y tripa porcina. También se verificó la capacidad de algunos aislamientos para formar biopelículas después de la exposición a tensiones subletales. De las muestras analizadas, el 12% tenía recuentos superiores a los permitidos por la legislación. Se aisló S. aureus del 44% de las muestras. De estos, el 54% tenía solo el gen sed y el 32% tenía los genes sec y sed, el 73% se clasificó como S. aureus resistente a la meticilina (MRSA). Del MRSA, el 62% tenía solo el gen sed y el 35% tenía ambos genes encontrados en el estudio. En cuanto a la formación de biopelículas en agar rojo Congo, el 68% de los aislados de S. aureus se consideraron formadores de biopelículas. Después de someterse a tensiones subletales, la mayoría de los aislados formadores de biopelículas continuaron formando biopelículas y los aislados que no eran formadores biopelículas respondieron de manera diferente. La condición de estrés subletal que más indujo la formación de biopelículas fue el frío. La producción de biopelículas se observó solo en acero inoxidable y tripa porcina en el 71% y el 57% de los aislamientos probados, respectivamente. Por lo tanto, enfatiza la importancia de implementar buenas prácticas dentro de la industria para controlar la contaminación microbiana y la formación de biopelículas.

Citas

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01/03/2021

Cómo citar

KAEFER, K.; SILVEIRA, D. R. .; ROSA, J. F. .; GONÇALVES, T. G. .; MORAES, T. P. de .; TIMM, C. D. . Caracterización fenotípica y genotípica de Staphylococcus aureus aislado de salchicha porcina. Research, Society and Development, [S. l.], v. 10, n. 2, p. e59910212041, 2021. DOI: 10.33448/rsd-v10i2.12041. Disponível em: https://rsdjournal.org/index.php/rsd/article/view/12041. Acesso em: 23 nov. 2024.

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Ciencias Agrarias y Biológicas