Health officials say 13 people now have been confirmed as having contracted salmonella typhimurium, suspected to have come from Portillo’s, a St. Charles restaurant, in northeast Illinois.

Nine are female and four are male, with their ages ranging from 17 to 64. Three of the patients were hospitalized, but all have since been released.

Portillo’s “is actively cooperating with the investigation, having cleaned and sanitized the building Monday night and discarded all food items, except for samples that were collected by Kane County Health Department staff to send to the IDPH lab for testing.”