Detección de factores de virulencia en Aeromonas spp. aisladas de la cadena alimentaria brasileña mediante pruebas fenotípicas y reacción en cadena de la polimerasa

Autores/as

DOI:

https://doi.org/10.33448/rsd-v11i16.35897

Palabras clave:

Aeromonads; Aeromonas hydrophila; Aeromonas caviae; Genes de virulencia; Fatores de virulencia.

Resumen

Aeromonas son habitantes naturales de los ambientes acuáticos y pueden estar asociadas a numerosas infecciones en humanos y animales. La enfermedad humana puede variar desde una diarrea autolimitada hasta una forma más grave. La patogénesis de las infecciones es multifactorial, debido a su gran variedad de factores de virulencia. El objetivo de este estudio es evaluar los marcadores de virulencia en aislados de Aeromonas y determinar sus perfiles de virulencia. Se analizaron 120 cepas de A. caviae (n = 57) y A. hydrophila (n = 63) de fuente humana, animal y ambientales entre 2008 y 2012. Se examinaron todos los aislados para detectar enzimas de virulencia extracelular por actividad fenotípica y los genes de virulencia hlyA, aerA, lip, gcat, ser, act, alt y exu por PCR. Observamos más del 90% de positividad para al menos un factor de virulencia fenotípico y todos ellos tenían al menos dos genes de virulencia medidos. Entre las enzimas de virulencia detectadas, DNasa estaba presente en 93,33% de los aislados y se detectó actividad hemolítica en 62,5%. Colagenasa y elastasa se encontraron en 13,33% y 10,83% de las cepas, respectivamente. Encontramos exu y gcat en todos los aislados, lip en 40,83%, aerA en 40,83%, hlyA en 40%, alt en 19,16%, act en 17,5% y ser en 66%. Se observó diferentes combinaciones de factores de virulencia entre los aislados, que demuestra la virulencia multifactorial em Aeromonas spp. y la diversidad de perfiles de virulencia encontrados sugiere la heterogeneidad de los clones que circulan en nuestro medio.

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Publicado

09/12/2022

Cómo citar

ROGES, E. M. .; SICILIANO, S.; DOMIT, C.; OTT, P. H.; BERTO, L. H. .; AQUINO, M. H. C. de .; RODRIGUES, D. dos P. . Detección de factores de virulencia en Aeromonas spp. aisladas de la cadena alimentaria brasileña mediante pruebas fenotípicas y reacción en cadena de la polimerasa. Research, Society and Development, [S. l.], v. 11, n. 16, p. e315111635897, 2022. DOI: 10.33448/rsd-v11i16.35897. Disponível em: https://rsdjournal.org/index.php/rsd/article/view/35897. Acesso em: 28 nov. 2024.

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Sección

Ciencias Agrarias y Biológicas