This photograph depicts the colonial growth pattern displayed byYersinia enterocolitica bacteria growing on a Hektoen enteric (HE) agar medium; Y. enterocolitica is a non-lactose fermenter, and its colonies atop the HE agar are blue-green in color.
This Gram-negative bacteria is one of the causes of yersiniosis—an infection found mainly affecting children, which can cause fever, abdominal pain, and diarrhea, which is often bloody. Symptoms typically develop 4 - 7 days after exposure and may last 1 - 3 weeks or longer.
Source: CDC
