Biocontrol of Vibrio vulnificus strains challenged with Isochrysis galbana cultures

The pathogenic bacterium Vibrio vulnificus is related to human infections by direct contact with the bacteria or by consuming raw aquacultural products, like oysters and clams. This work aimed to measure the effect of the microalga Isochrysis galbana on the density of two pathogenic V. vulnificus st...

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Bibliographic Details
Published in:Journal of applied phycology 2022-04, Vol.34 (2), p.883-887
Main Authors: Molina-Cárdenas, Ceres A., Lizárraga-Partida, Marcial L., Guerrero, Abraham, del Pilar Sánchez-Saavedra, M.
Format: Article
Language:English
Subjects:
Algae
Aquaculture
Aquaculture facilities
Aquaculture products
Aquatic microorganisms
Bacteria
Biological control
Biomedical and Life Sciences
Cell density
Clams
Cultures
Density
Ecology
Freshwater & Marine Ecology
Inoculation
Isochrysis galbana
Life Sciences
Marine molluscs
Membrane filtration
Microalgae
Microalgae culture
Microbiological strains
Mollusks
Oysters
Pathogens
Physical growth
Phytoplankton
Plant Physiology
Plant Sciences
Strains (organisms)
Vibrio vulnificus
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Summary:The pathogenic bacterium Vibrio vulnificus is related to human infections by direct contact with the bacteria or by consuming raw aquacultural products, like oysters and clams. This work aimed to measure the effect of the microalga Isochrysis galbana on the density of two pathogenic V. vulnificus strains when they are co-cultured. Vibrio vulnificus strains CICESE-316 and CICESE-325 were inhibited in co-cultures with the microalgae species. The I. galbana cell density reached values of 22×10 6 cells mL −1 after 12 days post-inoculation with V. vulnificus . The density of vibrios was monitored in the algae cultures by the membrane filtration method. The initial concentration of each Vibrio species in co-cultures was ≥10 4 CFU mL −1 , and the time required to achieve the inhibition of V. vulnificus (counts lower than 0.1 CFU mL −1 ) was 10 days for strain CICESE-316 and 7 days for strain CICESE-325. The undetectable levels of V. vulnificus in co-cultures with I. galbana were maintained until 12 days after inoculation. We concluded that the results obtained can promote the use of I. galbana cultures in aquaculture facilities to reduce the V. vulnificus load in the organism with commercial importance, such as bivalve mollusks and fishes.
ISSN:0921-8971
1573-5176
DOI:10.1007/s10811-021-02679-7