Resistance-nodulation-division efflux pump acrAB is modulated by florfenicol and contributes to drug resistance in the fish pathogen Piscirickettsia salmonis

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dc.contributor.authorSandoval, Rodrigo
dc.contributor.authorOliver, Cristian
dc.contributor.authorValdivia, Sharin
dc.contributor.authorValenzuela, Karla
dc.contributor.authorHaro, Ronie E.
dc.contributor.authorSánchez, Patricio
dc.contributor.authorOlavarría, Víctor H.
dc.contributor.authorValenzuela, Paulina
dc.contributor.authorAvendaño-Herrera, Rubén
dc.contributor.authorRomero, Alex
dc.contributor.authorCárcamo, Juan G.
dc.contributor.authorFigueroa, Jaime E.
dc.contributor.authorYáñez, Alejandro J.
dc.date.accessioned2023-10-26T13:35:41Z
dc.date.available2023-10-26T13:35:41Z
dc.date.issued2016-06
dc.descriptionIndexación: Scopus.es
dc.description.abstractPiscirickettsia salmonis is a fastidious intracellular pathogen responsible for high mortality rates in farmed salmonids, with serious economic consequences for the Chilean aquaculture industry. Oxytetracycline and florfenicol are the most frequently used antibiotics against P. salmonis, but routine use could contribute to drug resistance. This study identified differentiated florfenicol susceptibilities in two P. salmonis strains, LF-89 and AUSTRAL-005. The less susceptible isolate, AUSTRAL-005, also showed a high ethidium bromide efflux rate, indicating a higher activity of general efflux pump genes than LF-89. The P. salmonis genome presented resistance nodulation division (RND) family members, a family containing typical multidrug resistance-related efflux pumps in Gram-negative bacteria. Additionally, efflux pump acrAB genes were overexpressed in AUSTRAL-005 following exposure to the tolerated maximal concentration of florfenicol, in contrast to LF-89. These results indicate that tolerated maximum concentrations of florfenicol can modulate RND gene expression and increase efflux pump activity. We propose that the acrAB efflux pump is essential for P. salmonis survival at critical florfenicol concentrations and for the generation of antibiotic-resistant bacterial strains.es
dc.description.urihttps://academic.oup.com/femsle/article/363/11/fnw102/2197713?login=true
dc.identifier.citationFEMS Microbiology Letters. Volume 363, Issue 11, Pages 1 - 7. 1 June 2016es
dc.identifier.doi10.1093/femsle/fnw102
dc.identifier.issn0378-1097
dc.identifier.urihttps://repositorio.unab.cl/xmlui/handle/ria/53640
dc.language.isoenes
dc.publisherOxford University Presses
dc.subjectPiscirickettsia Salmonises
dc.subjectSRSes
dc.subjectRND Efflux Pumpes
dc.subjectFlorfenicoles
dc.subjectAntibiotic Resistancees
dc.titleResistance-nodulation-division efflux pump acrAB is modulated by florfenicol and contributes to drug resistance in the fish pathogen Piscirickettsia salmonises
dc.typeArtículoes
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