Neogen® Yersinia Selective Agar (Schiemann's CIN Agar)

Yersinia Selective Agar is used with cefsulodin and novobiocin for the isolation of Yersinia enterocolitica in a laboratory setting. Yersinia Selective Agar is not intended for use in the diagnosis of disease or other conditions in humans.

This medium is based on the work of Schiemann. It is used for the isolation and enumeration of Yersinia spp. from clinical samples and from food. The selective components are sodium desoxycholate, crystal violet, cefsulodin, irgasan and novobiocin. Yersiniae ferment mannitol with an intense, localized, acid production in the center of the colony which produces a red ‘bull’s eye’ appearance. The ratio of transparent border to red centre varies with serotype and environmental strains may appear rough with an irregular edge. Most other enteric bacteria, if they grow, produce a larger colony with a diffuse pinkish center and opaque outer zone.