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Isolation and Characterization of Two Lytic Bacteriophages, φSt2 and φGrn1; Phage Therapy Application for Biological Control of Vibrio alginolyticus in Aquaculture Live Feeds

PLoS ONE, Public Library of Science (PLoS), ISSN 1932-6203

Volume 11, 3, 2016

DOI:10.1371/journal.pone.0151101, Dimensions: pub.1048683865, PMC: PMC4780772, PMID: 26950336,

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  1. (1) University of Copenhagen, grid.5254.6, KU
  2. (2) Hellenic Centre for Marine Research, grid.410335.0
  3. (3) Pontificial Catholic University of Valparaiso, grid.8170.e

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Greece

Chile

Denmark

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Europe

South America

Description

Bacterial infections are a serious problem in aquaculture since they can result in massive mortalities in farmed fish and invertebrates. Vibriosis is one of the most common diseases in marine aquaculture hatcheries and its causative agents are bacteria of the genus Vibrio mostly entering larval rearing water through live feeds, such as Artemia and rotifers. The pathogenic Vibrio alginolyticus strain V1, isolated during a vibriosis outbreak in cultured seabream, Sparus aurata, was used as host to isolate and characterize the two novel bacteriophages φSt2 and φGrn1 for phage therapy application. In vitro cell lysis experiments were performed against the bacterial host V. alginolyticus strain V1 but also against 12 presumptive Vibrio strains originating from live prey Artemia salina cultures indicating the strong lytic efficacy of the 2 phages. In vivo administration of the phage cocktail, φSt2 and φGrn1, at MOI = 100 directly on live prey A. salina cultures, led to a 93% decrease of presumptive Vibrio population after 4 h of treatment. Current study suggests that administration of φSt2 and φGrn1 to live preys could selectively reduce Vibrio load in fish hatcheries. Innovative and environmental friendly solutions against bacterial diseases are more than necessary and phage therapy is one of them.

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University of Copenhagen

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Times Cited: 35

Field Citation Ratio (FCR): 6.68

Relative Citation ratio (RCR): 2.87

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