Pattern recognition system that monitors disease-causing bacteria in C. elegans

Researchers describe a new manner of detecting microbial infection that intercepts pathogen-derived signals of growth to assess the relative threat of virulent bacteria. A nuclear hormone receptor in the nematode C. elegans senses a toxic metabolite produced by the bacterial pathogen Pseudomonas aeruginosa to activate innate immunity. These data reveal an ancient strategy that informs the origins of pathogen detection and may be among the most primordial forms of immune sensing in animals.
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