On Wednesday, the U.S. Centers for Disease Control (CDC) reported 15 additional cases of E. coli infection associated with onions used in Quarter Pounders from the fast-food restaurant.

The new cases occurred before McDonald’s halted the use of onions sourced from Taylor Farms in Colorado Springs, as noted by the CDC.

Additionally, the CDC confirmed five more hospitalizations related to this outbreak, raising the total number of hospitalizations to 27, with the overall case count reaching 90. Tragically, one individual in Colorado has died due to this outbreak.

During an investor call on Tuesday, McDonald’s CEO Chris Kempczinski expressed regret over the situation, stating he is, “glad that this issue seems to be under control, and I trust the safety of dining at McDonald’s.”

At least three lawsuits have been initiated against McDonald’s in connection with this outbreak, with legal representatives expecting more lawsuits may follow.

The company announced on Sunday that Quarter Pounders would be back on the menu within the week.

Understanding E. coli: What Are the Symptoms?

Escherichia coli (E. coli) bacteria primarily exist harmlessly in the intestines of both humans and animals. However, some strains can lead to mild to severe gastrointestinal conditions if ingested, according to the CDC.

E. coli types that cause diarrhea typically spread through food or water contaminated with feces. For example, food handlers might transmit the bacteria if they fail to wash their hands properly after using the bathroom. Moreover, animals like cattle can contaminate food and crops with E. coli.

Symptoms of an E. coli infection can include severe abdominal cramps, diarrhea (often bloody), and vomiting, as stated by the CDC.

The CDC advises that McDonald’s customers should seek prompt medical care if they experience:

• Diarrhea accompanied by a fever exceeding 102°F
  • Diarrhea lasting more than 3 days without improvement
  • Bloody diarrhea
• Vomiting so severe that it prevents keeping liquids down
• Signs of dehydration, including:
  • Infrequent urination
  • Dried-out mouth and throat
  • Feeling dizzy when standing