Drosophila host defense after oral infection by an entomopathogenic Pseudomonas species

Nicolas Vodovar, Marisa Vinals, Peter Liehl, Alan Basset, Jeril Degrouard, Paul Spellman, Frédéric Boccard, Bruno Lemaitre

Research output: Contribution to journalArticlepeer-review

310 Scopus citations


Drosophila has been shown to be a valuable model for the investigation of host-pathogen interactions. Study of the Drosophila immune response has been hampered, however, by the lack of true Drosophila pathogens. In nearly all studies reported, the bacteria used were directly injected within the body cavity of the insect, bypassing the initial steps of a natural interaction. Here, we report the identification of a previously uncharacterized bacterial species, Pseudomonas entomophila (Pe), which has the capacity to induce the systemic expression of antimicrobial peptide genes in Drosophila after ingestion. In contrast to previously identified bacteria, Pe is highly pathogenic to both Drosophila larvae and adults, and its persistence in larvae leads to a massive destruction of gut cells. Using this strain, we have analyzed the modulation of the larval transcriptome upon bacterial infection. We found that natural infection by Pe induces a dramatic change in larval gene expression. In addition to immunity genes, our study identifies many genes associated with Pe pathogenesis that have been previously unreported.

Original languageEnglish (US)
Pages (from-to)11414-11419
Number of pages6
JournalProceedings of the National Academy of Sciences of the United States of America
Issue number32
StatePublished - Aug 9 2005
Externally publishedYes


  • Host-microbe interaction
  • Innate immunity
  • Microarray

ASJC Scopus subject areas

  • General


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