Which of the following media is selective for Campylobacter species?

Campylobacter blood agar is specifically formulated to encourage the growth of Campylobacter species while inhibiting the growth of other bacteria. This selective medium contains nutrients that support the unique metabolic requirements of Campylobacter, and the conditions (such as the environment with reduced oxygen and increased carbon dioxide) are optimized for this genus, enabling efficient isolation and identification of these bacteria from specimens. In contrast, the other media listed are not specialized for Campylobacter; for instance, Columbia agar is a general-purpose medium, bile esculin agar is selective for enterococci and some group D streptococci, and Mueller-Hinton agar is primarily used for antimicrobial susceptibility testing. Thus, Campylobacter blood agar stands out as the appropriate choice for selectively isolating Campylobacter species.