The nematode worm Caenorhabditis elegans presents many advantages as a mode
l system. Apart from the benefits of having access to its entire genome seq
uence, C. elegans has recently emerged as a potentially useful tool for the
study of host-pathogen interactions. This model has already contributed to
a broader understanding of Pseudomonas aeruginosa pathogenesis, and to rei
nforcing the notion that common virulence mechanisms exist. In this paper,
we will discuss these results and suggest that future research based on the
C. elegans model may also contribute to a better understanding of conserve
d mechanisms of host defence.