IMIS | Flanders Marine Institute
 

Flanders Marine Institute

Platform for marine research

IMIS

Publications | Institutes | Persons | Datasets | Projects | Maps
[ report an error in this record ]basket (0): add | show Printer-friendly version

Luminal uptake of Vibrio (Listonella) anguillarum by shed enterocytes - a novel early defence strategy in larval fish
Rekecki, A.; Ringø, E.; Olsen, R.; Myklebust, R.; Dierckens, K.; Bergh, Ø; Laureau, S.; Cornelissen, M.; Ducatelle, R.; Decostere, A.; Bossier, P.; Van Den Broeck, W. (2013). Luminal uptake of Vibrio (Listonella) anguillarum by shed enterocytes - a novel early defence strategy in larval fish. J. Fish Dis. 36(4): 419-426. hdl.handle.net/10.1111/jfd.12009
In: Journal of Fish Diseases. Blackwell Science: Oxford; London; Edinburgh; Boston; Melbourne. ISSN 0140-7775, more
Peer reviewed article  

Available in  Authors 
    VLIZ: Open Repository 257411 [ OMA ]

Keywords
    Dicentrarchus labrax (Linnaeus, 1758) [WoRMS]; Vibrio anguillarum; Marine
Author keywords
    bacterial outer membrane vesicles; gnotobiotic sea bass; immunogold labelling; luminal phagocytosis; Vibrio anguillarum

Authors  Top 
  • Rekecki, A., more
  • Ringø, E.
  • Olsen, R.
  • Myklebust, R.
  • Dierckens, K., more
  • Bergh, Ø, more
  • Laureau, S.
  • Cornelissen, M.
  • Ducatelle, R., more
  • Decostere, A., more
  • Bossier, P., more
  • Van Den Broeck, W., more

Abstract
    As adhesion and translocation through fish gut enterocytes of the pathogen Vibrio (Listonella) anguillarum are not well investigated, the effective cause of disease and mortality outbreaks in larval sea bass, Dicentrarchus labrax, suffering from vibriosis is unknown. We detected V. anguillarum within the gut of experimentally infected gnotobiotic sea bass larvae using transmission electron microscopy and immunogold labelling. Intact bacteria were observed in close contact with the apical brush border in the gut lumen. Enterocytes contained lysosomes positive for protein A-gold particles suggesting intracellular elimination of bacterial fragments. Shed intestinal cells were regularly visualized in the gut lumen in late stages of exposure. Some of the luminal cells showed invagination and putative engulfment of bacterial structures by pseudopod-like formations. The engulfed structures were positive for protein A-colloidal gold indicating that these structures were V. anguillarum. Immunogold positive thread-like structures secreted by V. anguillarum suggested the presence of outer membrane vesicles (MVs) hypothesizing that MVs are potent transporters of active virulence factors to sea bass gut cells suggestive for a substantial role in biofilm formation and pathogenesis. We put forward the hypothesis that MVs are important in the pathogenesis of V. anguillarum in sea bass larvae.

All data in IMIS is subject to the VLIZ privacy policy Top | Authors