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Summary: Nematodes from the species Caenorhabditis elegans show aversion to harmful odors, which might be an indicator of their enhanced longevity. A new study reveals that these odor molecules from pathogenic bacteria not only induce avoidance behaviors in the nematodes but also stimulate a protective neural circuit in other tissues. This circuit boosts the efficient processing of toxic proteins, akin to proteins linked to human neurodegenerative diseases. The study suggests that sensing [...]