Development on pathogens. (a) Time course of developmental transitions and dauer formation on nonpathogenic and pathogenic foods. (b) Time course of appearance of dauerlike nematodes in the populations growing on pathogenic bacteria. (c, d) Dauer formation in successive generations on P. aeruginosa PAO1 (c) and S. Typhimurium MST1 (d). ****, P < 0.0001; ***, P < 0.001; **, P < 0.005; *, P < 0.05; ns, not significant. Error bars indicate SEM of at least three biological replicas done in triplicates.