Submitted to: Meeting Abstract
Publication Type: Abstract Only
Publication Acceptance Date: 4/10/2017
Publication Date: 6/1/2017
Citation: Richards, G.P. 2017. Pseudomonas piscicida kills vibrios by two distinct mechanisms. Meeting Abstract. doi.org/10.1128/AEM00800-17.
Technical Abstract: Pseudoalteromonas piscicida is a naturally-occurring marine bacterium which kills competing bacteria, including vibrios. In studies by Richards et al. (AEM00175-17), three strains of P. piscicida were isolated and characterized. Strains secreted proteolytic enzymes which likely killed competing organisms. A second method of inhibition involved a novel direct transfer of surface vesicles from Pseudoalteromonas to competing vibrios followed by the digestion of holes in Vibrio parahaemolyticus cell walls apparently from vesicle-associated proteolytic enzymes. Pseudoalteromonas congregated around permeabilized vibrios in a predatory fashion. Pseudoalteromonas piscicida may have utility for controlling biofilms, reducing pathogens in aquaculture, and in enhancing food safety.