title: Long-term persistence of Yersinia pseudotuberculosis in entomopathogenic nematodes.
abstract: Entomopathogenic nematodes (EPNs) are small worms whose ecological behaviour consists to invade, kill insects and feed on their cadavers thanks to a species-specific symbiotic bacterium belonging to any of the genera Xenorhabdus or Photorhabdus hosted in the gastro-intestinal tract of EPNs. The symbiont provides a number of biological functions that are essential for its EPN host including the production of entomotoxins, of enzymes able to degrade the insect constitutive macromolecules and of antimicrobial compounds able to prevent the growth of competitors in the insect cadaver. The question addressed in this study was to investigate whether a mammalian pathogen taxonomically related to Xenorhabdus was able to substitute for or "hijack" the symbiotic relationship associating Xenorhabdus and Steinernema EPNs. To deal with this question, a laboratory experimental model was developed consisting in Galleria mellonella insect larvae, Steinernema EPNs with or without their natural Xenorhabdus symbiont and Yersinia pseudotuberculosis brought artificially either in the gut of EPNs or in the haemocoel of the insect larva prior to infection. The developed model demonstrated the capacity of EPNs to act as an efficient reservoir ensuring exponential multiplication, maintenance and dissemination of Y. pseudotuberculosis.
authors: Veterinary and Agrochemical Research Centre (VAR), Brussels, Belgium; Institute of life sciences, Catholic University of Louvain-la-Neuve (UCL), Louvain-la-Neuve, Belgium.
authors: Samuel
authors: S
authors: Gengler
authors: Antwerp University, Evolutionary Biology, 171, Groenenborgerlaan, 2020 Antwerpen, Belgium; Institute of Integrative Biology, School of Biological Sciences, University of Liverpool, Liverpool, United Kingdom.
authors: Anne
authors: A
authors: Laudisoit
authors: Institute of life sciences, Catholic University of Louvain-la-Neuve (UCL), Louvain-la-Neuve, Belgium.
authors: Henri
authors: H
authors: Batoko
authors: Veterinary and Agrochemical Research Centre (VAR), Brussels, Belgium.
authors: Pierre
authors: P
authors: Wattiau
mesh_terms: D000818:Animals; D041981:Gastrointestinal Tract / Q000382:microbiology / Q000469:parasitology; D054884:Host-Pathogen Interactions; D007814:Larva / Q000382:microbiology / Q000469:parasitology; D009036:Moths / Q000382:microbiology / Q000469:parasitology; D009348:Nematoda / Q000382:microbiology*; D013559:Symbiosis; D015011:Yersinia pseudotuberculosis / Q000502:physiology*
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