Krystle Wagner of the Grand Haven Tribune reports that one restaurant has been named (by itself) while another three restaurants and a grocery store are being protected by the Muskegon County Health Department “at the businesses’ request.”

Earlier this week, 20 Muskegon County and three Ottawa County residents were confirmed as being afflicted with Salmonella, which investigators have determined occurred between October 28 and November 5 based on the victims’ symptoms.  Four more cases were reported Friday, said Ken Kraus, director of Public Health Muskegon County.

Kraus said previously that they are focusing on one Muskegon County restaurant as a likely source because all of the people who contracted the disease ate there. However, he said Friday that investigators are looking into three or four Muskegon County restaurants and a grocery store as the source. Kraus declined to name the establishments at the businesses’ request.

A common ingredient perhaps?