The Centers for Disease Control and Prevention announced Tuesday a multi-state E. coli outbreak has been linked to McDonald's Quarter Pounder burger, resulting in some hospitalizations and one death.

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The outbreak has sickened people in Colorado (26), Nebraska (9), Utah (4), Wyoming (4), Oregon (1), Montana (1), Kansas (1), Missouri (1), Iowa (1), Wisconsin (1), according to the CDC.

Though most E. coli bacteria are harmless, certain strains can cause fever, vomiting, stomach cramps and bloody or watery diarrhea. Symptoms usually start three to four days after consumption of contaminated food and most people recover without treatment after five to seven days, though the CDC recommends people call their healthcare providers if they are showing certain severe symptoms, such as vomiting or diarrhea lasting more than two days or a fever above 102 degrees.

McDonald's stock dropped more than 9% in after-hours trading after the alert was published. Shares reached as low as $285 after closing the day at $314.69.

McDonald's Quarter Pounder, one of the chain's most popular burgers alongside the Big Mac, is 520 calories and contains a quarter pound 100% beef patty, American cheese, ketchup, pickle slices, onions and mustard. The McDonald's-linked E. coli outbreak is the latest outbreak involving the bacteria. The CDC identified an outbreak linked to organic walnuts in July that sickened 13 people and another outbreak in March linked to raw cheese that sickened 11.

E. coli Outbreak Linked to McDonald's Quarter Pounders (CDC)