The CDC explained in a statement from Thursday that a 29-year-old man in Minnesota had been hospitalized with symptoms including a fever, “severe myalgias,” and “periorbital edema.” Prior to seeking medical attention, the man had attended a family gathering with eight other family members where “rare” bear meat had been served days before the “onset” of his symptoms.

At the family gathering, kebabs made from bear meat that one of the family members had “harvested” in northern Saskatchewan, Canada, were served, according to the CDC.

“The meat was initially inadvertently served rare, reportedly because the meat was dark in color, and it was difficult for the family members to visually ascertain the level of doneness,” the CDC said.

An investigation surrounding the patient’s symptoms was launched, resulting in his diagnosis being “confirmed by a positive Trichinella immunoglobulin (Ig) G antibody test result.”