Denmark health officials are reporting an outbreak of Yersinia enterocolitica and the Statens Serum Institut (SSI) is investigating the possible source.
According to a Copenhagen Post report, 18 people, men and women, have become infected with the bacteria since Mar. 30.
The once common infection is not common in Denmark today. Over the last five years there have only been three outbreaks.
Sweden has seen a similar outbreak, and the Danish and Swedish authorities are working together to map the infection.
Yersiniosis is an infection caused most often by eating raw or undercooked pork contaminated with Yersinia enterocolitica bacteria.