A McDonald’s Quarter Pounder-related E. Coli outbreak in the US has killed one person and sickened hundreds more

During extended trading, shares of the biggest fast-food business in the world fell around 6%. By endangering the demand for beef, the epidemic may potentially put pressure on U.S. cattle futures on Wednesday, according to a livestock dealer.

According to the CDC, every person contacted as part of the outbreak investigation said they had eaten at McDonald’s before to being ill, and the majority of them stated having a Quarter Pounder hamburger.

The CDC announced that 49 people in 10 states have been sickened with E coli after eating at McDonald’s. Most ate a Quarter Pounder

Although the precise substance causing the disease has not been found, the CDC stated that investigators are concentrating on fresh beef patties and sliced onions. Colorado and Nebraska reported the majority of the illnesses.

McDonald’s North America Chief Supply Chain Officer Cesar Piña said in a statement, “The preliminary results of the investigation suggest that a subset of illnesses may be connected to slivered onions used in the Quarter Pounder and sourced by a single supplier that serves three distribution centres.”

While the inquiry is ongoing, McDonald’s has proactively removed the beef patties and slivered onions used in the Quarter Pounder hamburgers from its locations in the impacted states, the firm told the CDC.

More cases of illness could emerge, according to U.S. food safety lawyer Bill Marler, who represented a sufferer in the Jack in the Box incident. According to him, onions have been connected to previous E. coli O157:H7 epidemics.

Symptoms of Shiga toxin-producing E.coli include severe diarrhea and vomiting

Because of food safety regulations, beef contamination is less frequent, according to Marler, a founder of Marler Clark in Seattle. “You’d have to have multiple restaurants under-cooking the meat,” he stated. McDonald’s stated in a statement that it is working with suppliers to restock the Quarter Pounder in the upcoming week and is temporarily withdrawing it from restaurants in the affected states, which include Colorado, Kansas, Utah, and Wyoming. E. coli symptoms include vomiting, diarrhoea, and excruciating stomach pains.

According to Colorado’s public health department, the majority of individuals who have an infection will begin to feel ill three to four days after consuming or consuming anything containing the germs. However, the government also noted that diseases may begin one to ten days following exposure.

Due to E. coli incidents in many states in 2015, the burrito company Chipotle (CMG.N) suffered a decline in sales and a negative impact on its reputation. A separate strain of E. coli, which usually causes less severe illness than E. coli O157:H7, was related to that outbreak.

The CDC reported that, in addition to Colorado, small groups of a few persons in Nebraska, Utah, and Wyoming became unwell after consuming a Quarter Pounder. Each of the states of Kansas, Missouri, Oregon, Iowa, Wisconsin, and Montana experienced one sickness.