Michigan Mystery Bug

Via ProMED-mail: a flu-like illness has broken out in a nursing home in Troy, Michigan. WXYZ News reports:

The outbreak occurred in the Alzheimer's unit, which has been quarantined. There are 39 people who live there, and 16 have fallen ill with the same flu like symptoms.
Paramedics were on the scene, suited up in biohazard in uniforms. Sick patients have been evacuated from the building to three area hospitals.
The outbreak started Wednesday night. 4 people became ill with flu like symptoms such as nausea, vomiting, and diarrhea. All of these people were taken to the hospital, where one man went into cardiac arrest and died.