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ARS Home » Northeast Area » Wyndmoor, Pennsylvania » Eastern Regional Research Center » Food Safety and Intervention Technologies Research » Research » Publications at this Location » Publication #340263

Research Project: Development of Detection and Intervention Technologies for Bacterial and Viral Pathogens Affecting Shellfish

Location: Food Safety and Intervention Technologies Research

Title: Pseudomonas piscicida kills vibrios by two distinct mechanisms

item Richards, Gary

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.

Interpretive Summary:

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.