80 of these cases have been traced back to a restaurant in Löttorp, near the south eastern city of Kalmar. According to the Public Health Agency of Sweden, this means that it is likely that all cases are related to the same infection source.
Several people had to be taken to hospital.
Health authorities are currently analyzing several samples from the restaurant but so far no bacteria have been found in them. Investigators will keep analyzing new samples and the restaurant will remain closed until all the analyses are finished.