We identified 30 contaminating colonies from 10 plates each of mCCDA, mCCtDA, and mCCxDA to determine the frequencies of competing bacteria from growing on each of the selective media.
Ten bacterial cultures from each of three selective agar plates were chosen at random from the plates contaminated with non-Campylobacter colonies.
A single colony was subcultured on tryptic soy agar (Oxoid) or blood agar (Oxoid)