Pathogenic bacteria induce aversive olfactory learning in Caenorhabditis elegans

By Yun Zhang, Hang Lu, Cori Bargmann. Nature, 2005

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Are bigger brains better? (2009, background): “There might be relatively little mileage, for example, to hunt for intraspecific correlations between brain size and associative learning ability in insects (or larger animals), when even the smallest nervous systems, such as that of the nematode Caenorhabditis elegans with its 302 neurons, are capa”
Genomic analysis reveals that Pseudomonas aeruginosa virulence is combinatorial (2006, background): “elegans preexposed to PA14 can modify its olfactory preferences to avoid the pathogen, and that this 'learned' avoidance behavior does not occur with nonpathogenic mutants of PA14, suggests that an interaction between these two organisms is biologically relevant [32].”
Chemosensation in C. elegans. (2006, background): “elegans can learn to avoid odors associated with infection by pathogenic bacteria, a behavior analogous to mammalian conditioned taste aversion (Zhang et al., 2005).”
Disgust: evolved function and structure. (2013, background): “We suggest that the phylogenetically ancient (Curtis, 2007; Zhang et al., 2005) pathogen disgust was a felicitous system to co-opt to perform the function of avoiding biologically costly mates.”