Food Safety Report: McDonald's, South West Avenue, Waukesha, WI, USA 10 months ago • details 40 Comments Comment Suspected food poisoning. Symptoms: Diarrhea, Nausea, Vomiting, Fever, Stomach Pain, Chills Suspected source: Shamrock shake Onset: 4 to 12 hours Duration: 12 to 24 hours Additional information: NA