"And when someone eats it, sickness or miscarriage may not occur for weeks later, when it can be quite hard to trace back and figure out what the contaminated food was.??? Symptoms of listeriosis include fever, muscle aches, diarrhea or other gastrointestinal problems, according to the CDC. But almost every listeriosis diagnosis involves an invasive infection, which typically means the bacteria hav" . . . . . .