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AnE. colioutbreak linked to McDonald ’s Quarter Pounders has sickened nearly 50 hoi polloi across 10 United States Department of State , include one person who died of the infection .

wellness functionary have launched an probe to find which ingredient in the hamburger was belike foul . In the meanwhile , McDonald ’s has stopped using the slivered onions and beef patties used for Quarter Pounders in the touched states . Diced onions and other types of boeuf patty have not been implicated in the outbreak , theFood and Drug Administration ( FDA)has clear up . ( Based on photos , the sliver onion appear to be short , Julienne - cut slices . )

A close-up of a McDonald�s quarter pounder burger against a white background

Health officials suspect that either the onions or the beef in the Quarter Pounders were the source of theE. coli.

E. coli , orEscherichia coli , is a bacterium often found in the guts of salubrious people and strong - full-blood animals . However , there are many types ofE. coli , and some can make masses sick . These disease - have bacteria includeE. coliO157 : H7 , which has been attach to the Quarter Pounder outbreak .

This type ofE. colican cause particularly severe enteral infection , in part because it release a toxin that can damage the lining of the bowel and thus cause bloody looseness of the bowels . Symptoms of this contagion typically arise two to five days after a person eat contaminate food or liquid , and they can last for about five to seven daytime .

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Symptoms let in abdominal cramp , vomiting , dehydration , pyrexia , looseness of the bowels with or without lineage in it , fatigue duty and sickness . accord toJohns Hopkins Medicine , roughly 8 % of case lead tohemolytic uraemic syndrome(HUS ) , which damage blood cells and the kidneys and can lead to kidney failure and potentially death . Children and older adults face the highest risk of HUS fromE. coliinfections .

Forty - nine illnesses have been linked to the on-going outbreak , including 10 hospital care and one death , theCenters for Disease Control and Prevention(CDC ) reported Tuesday ( Oct. 22 ) . Colorado has reported the most fount , with 26 , keep an eye on by Nebraska with nine . People have also take sickin Montana , Oregon , Wyoming , Utah , Kansas , Iowa , Missouri and Wisconsin .

" Everyone interview has cover eat at McDonald ’s before their illness start , and most specifically mentioned eating a Quarter Pounder hamburger,“the CDC reportedon its investigation page . ( The CDC did not note how many masses had been interview out of the full group . )

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Health official have incur grounds that slivered onion plant used on the burger are a likely root of the contamination , and they ’re also looking into the beef cattle patties , as that ’s another common itinerary ofE. coliexposure . McDonald ’s has stopped using Quarter Pounder slivered onions and squawk patty in Colorado , Kansas , Utah and Wyoming , as well as portions of Idaho , Iowa , Missouri , Montana , Nebraska , Nevada , New Mexico and Oklahoma .

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" Quarter Irish punt beef patty are only used on Quarter Pounders , " the CDC has said . " Fresh splinter onion plant are primarily used on Quarter Pounder hamburgers and not other bill of fare point . "

People typically recover fromE. coliinfections without discourse but stern cases , peculiarly those demand HUS , necessitate treatment in a hospital . the great unwashed who develop serious symptom after eat a Quarter Pounder should essay treatment and tell their provider what they eat , the CDC advises . People who have questions about the irruption in fussy states can contact thatstate ’s health department .

a photo of burgers and fries next to vegetables

This clause is for informational purposes only and is not signify to offer aesculapian advice .

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