TSI reaction. Generously inoculate slant and stab butt of TSI (M149) slant from blood plate. Incubate under microaerobic
atmosphere at 35-37°C for 5 days. Eighty percent of C. coli and a few C. lari produce H2S at stab; C. jejuni does not produce
H2S. All Campylobacter spp. produce alkaline/alkaline reactions. Prepare slants no more than 7 days before use.