Fig. 2
From: Prevalence of human pathogenic Yersinia enterocolitica in Swedish pig farms
a Yersinia enterocolitica bioserotype 4/O:3 isolate on CHROMagar™ Y. enterocolitica (CAY) plate incubated at 25 °C for 24–48 h. White colony formations with a transparent “bull’s eye”. b Yersinia enterocolitica bioserotype 1A/O:8 isolate on CHROMagar™ Y. enterocolitica (CAY) plate incubated at 25 °C for 24–48 h. Blue swarming colonies with dark metallic blue “bull’s eye”