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Selected bacterial strains protect Artemia spp. from the pathogenic effects of Vibrio proteolyticus CW8T2
Verschuere, L.; Heang, H.; Criel, G.R.J.; Sorgeloos, P.; Verstraete, W. (2000). Selected bacterial strains protect Artemia spp. from the pathogenic effects of Vibrio proteolyticus CW8T2. Appl. Environ. Microbiol. 66(3): 1139-1146
In: Applied and Environmental Microbiology. American Society for Microbiology: Baltimore. ISSN 0099-2240, more
Peer reviewed article

Also published as
  • Verschuere, L.; Heang, H.; Criel, G.R.J.; Sorgeloos, P.; Verstraete, W. (2000). Selected bacterial strains protect Artemia spp. from the pathogenic effects of Vibrio proteolyticus CW8T2, in: (2000). VLIZ Coll. Rep. 30(2000). VLIZ Collected Reprints: Marine and Coastal Research in Flanders, 30: pp. chapter 45, more

Available in Authors 
    VLIZ: Open Repository 100348 [ OMA ]

Keywords
    Aquatic animals; Bacteria; Biological control; Brine shrimp culture; Disease control; Infectious diseases; Microbiological analysis; Pathogenic bacteria; Artemia Leach, 1819 [WoRMS]; Vibrio proteolyticus Baumann, Baumann & Mandel, 1971 [WoRMS]; Marine; Brackish water

Authors  Top 
  • Verschuere, L.
  • Heang, H.
  • Criel, G.R.J., more
  • Sorgeloos, P., more
  • Verstraete, W., editor, more

Abstract
    In this study Vibrio proteolyticus CW8T2 has been identified as a virulent pathogen for Artemia spp. Its infection route has been visualized with transmission electron microscopy. The pathogen affected microvilli and gut epithelial cells, disrupted epithelial cell junctions, and reached the body cavity, where it devastated cells and tissues. In vivo antagonism tests showed that pre-emptive colonization of the culture water with nine selected bacterial strains protected Artemia juveniles against the pathogenic effects. Two categories of the selected strains could be distinguished: (i) strains providing total protection, as no mortality occurred 2 days after the experimental infection with V. proteolyticus CW8T2, with strain LVS8 as a representative, and (ii) strains providing partial protection, as significant but not total mortality was observed, with strain LVS2 as a representative. The growth of V. proteolyticus CW8T2 in the culture medium was slowed down in the presence of strains LVS2 and LVS8, but growth suppression was distinctly higher with LVS8 than with LVS2. It was striking that the strains that gave only partial protection against the pathogen in the in vivo antagonism test showed also a restricted capability to colonize the Artemia compared to the strains providing total protection. The in vivo antagonism tests and the filtrate experiments showed that probably no extracellular bacterial compounds were involved in the protective action but that the living cells were required to protect Artemia against V. proteolyticus CW8T2.

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