Inhibición del quórum sensing mediante el quórum quenching en postlarvas de Litopenaeus vannamei
DOI:
https://doi.org/10.33936/la_tecnica.v0i23.1538Palavras-chave:
Litopenaeus vannamei; quorum sensing; quorum quenching; bacterias patogénicas; bacterias probióticasResumo
Inhibition of the quorum sensing by quorum quenching in postlarva of Litopenaeus vannamei
El cultivo del camarón blanco Litopenaeus vannamei es un recurso acuícola de gran importancia económica a nivel mundial; sin embargo, es severamente afectado por varios tipos de enfermedades infecciosas, principalmente virales y bacterianas. Sin embargo las pérdidas masivas reportadas durante los últimos años, están generalmente relacionadas a infecciones bacterianas en particular, el síndrome de mortalidad temprana (EMS) y más recientemente relacionada a la enfermedad de necrosis hepatopancreática aguda (AHPND) por sus siglas en ingles. Para asegurar la sostenibilidad de la industria del camarón, se debe mejorar la productividad en particular mediante el uso de consorcios de bacterias probióticas eficientes para la prevención de las enfermedades bacterianas. Dos consorcios de bacterias probióticas (consorcios comerciales y consorcio CA), fueron evaluados en pruebas in vitro y en tanques de producción de post-larvas de camarón L. vannamei, donde se realizó la determinación subsecuente del grado de inhibición del quórum sensing de las bacterias patogénicas mediante el quórum quenching de bacterias probióticas y paralelamente a los análisis de sobrevivencia. Como resultados el consorcio CA fue el que presento mayor grado de inhibición del quorum sensing in vitro en paralelo a los mayores porcentajes de sobrevivencia en tanques de producción de post-larvas de camarón. El mejor efecto probiótico en post-larvas de L. vannamei resultaron en los tratamientos del consorcio CA, como los mejores supresores en la presencia de vibrios en el cultivo bacteriológico así como mayores porcentajes de sobrevivencia en tanques de producción de post-larvas de camarón.
Palabras clave: Litopenaeus vannamei; quorum sensing; quorum quenching; bacterias patogénicas; bacterias probióticas
Abstract
The cultivation of white shrimp Litopenaeus vannamei is an aquaculture resource of great economic importance worldwide; however, it is severely affected by several types of infectious diseases, mainly viral and bacterial. However, the massive losses reported in recent years are generally related to bacterial infections in particular, early mortality syndrome (EMS) and more recently related to acute hepatopancreatic necrosis disease (AHPND). To ensure the sustainability of the shrimp industry, productivity must be improved in particular by the use of efficient probiotic bacteria consortia for the prevention of bacterial diseases. Two consortia of probiotic bacteria (commercial consortia and CA consortium) were evaluated in in vitro tests and in post-larvae production tanks of L. vannamei shrimp, where the subsequent determination of the degree of inhibition of the quorum sensing of pathogenic bacteria was carried out. By the quenching quorum of probiotic bacteria and parallel to the survival analysis. As a result, the CA consortium showed the greatest degree of inhibition of in vitro quorum sensing in parallel to the higher survival rates in shrimp post-larval production tanks. The best probiotic effect in post-larvae of L. vannamei resulted in the CA consortia treatments, as the best suppressors in the presence of vibrios in the bacteriological culture as well as higher survival rates in post-larvae shrimp production tanks
Keywords: Litopenaeus vannamei; quorum sensing; quorum quenching; pathogenic bacteria; probiotic bacteria.
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