Figure 1. Screening for antioxidant bacteria in C. elegans.

Survival upon a 5 mM H₂O₂ treatment for 5 h of C. elegans BA 17 strain fed for 3 days with Bifidobacteria, Lactobacilli and Streptococci strains in liquid medium. Worms were fed with E. coli OP 50, for larvae 1^st stage synchronization. E. coli OP 50 strain was inhibited with antibiotics prior of LAB and Bifidobacteria feeding. Protection by E. coli OP50 is fixed at 100%.