a blood-free , charcoal-based selective medium ( csm ) consisting of a columbia agar base , activated charcoal ( 4 g/liter ) , hematin ( 0.032 g/liter ) , sodium pyruvate ( 0.1 g/liter ) , cefoperazone ( 32 mg/liter ) , vancomycin ( 20 mg/liter ) , and cycloheximide ( 100 mg/liter ) supported the growth of campylobacter jejuni and c. coli with colony counts equivalent to those obtained on antibiotic-free horse blood agar .
C0007955
charcoal
C0001275
activated charcoal