The CDC says that slivered onions are likely McDonald's E. Coli infection causes cases to rise to 90

Associated with McDonald's Quarter Pounder e. coli cases rose to 90, the Centers for Disease Control and Prevention said Wednesday, after 75 cases were reported last Friday.

The CDC said slivered onions used in burgers are a “potential source” of the outbreak.

A spokesperson for McDonald's All quarter pounders in the affected state were removed from restaurants by Oct. 22, when the outbreak was first announced.

The CDC says further risk to the public is “very low.” The most recent case was on October 16.

On Sunday, Colorado Department of Agriculture officials ruled out beef patties used in the Quarter Pounder as the source of the outbreak after testing E. No trace of coli was found

The outbreak has resulted in one death and 27 hospitalizations so far, the CDC said. At least two people have been diagnosed with a rare kidney disease called hemolytic uremic syndrome.

A family in Grand Junction, Colorado told NBC News that their 15-year-old daughter was one of those who developed the kidney condition.

The high school freshman's initial symptoms — fever and stomach aches — began after several visits to his local McDonald's for a Quarter Pounder. He experienced vomiting and diarrhea with blood.

He has since been hospitalized with kidney damage, the family said, and has had to undergo multiple rounds of dialysis.

The actual number of cases associated with the Quarter Pounder is likely much higher than the 90 reported so far. E. Most people with coli infections are not tested for the bacteria and recover on their own.

Thirteen states have filed lawsuits: Colorado, Iowa, Kansas, Michigan, Missouri, Nebraska, New Mexico, Montana, Oregon, Utah, Washington, Wisconsin, and Wyoming.

The Food and Drug Administration also said sleeved onions supplied by food manufacturer Taylor Farms of Colorado Springs were the most likely source of contamination.

The FDA said Wednesday that in addition to inspecting a Taylor Farms processing plant in Colorado, it is looking into an “onion grower of interest” located in Washington state.

According to McDonald's, 900 restaurants in 12 states receive onions from Taylor Farms.

The restaurant chain said it has stopped onion supply from the company indefinitely from Friday. It will start selling onion-free quarter pounders at affected stores this week.

Other restaurant chains in Colorado, including Taco Bell, Burger King, KFC, Pizza Hut and Illegal Pete's, have removed onions from their menus out of an abundance of caution. After eating in those restaurants, people's e. No signs of coli.