US health authorities have determined that the likely cause of the outbreak is contaminated slivered onions used in McDonald's Quarter Pounders and other menu items (Representational image: Wikimedia Commons) 
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US Authorities Pinpoint Onions As Cause Of McDonald's E. Coli Outbreak

McDonald's Resumes Quarter Pounder Sales After E. Coli Scare; Taylor Farms Recalls Onions Linked to McDonald's E. Coli Outbreak

Vaishnavi Vilas Dalvi, B. Pharm

A recent E. coli outbreak linked to McDonald's restaurants has resulted in 90 people falling ill, including 27 hospitalizations and one fatality. US health authorities have determined that the likely cause of the outbreak is contaminated slivered onions used in McDonald's Quarter Pounders and other menu items.

The Centers for Disease Control and Prevention (CDC) investigation revealed that the fresh, slivered onions supplied by Taylor Farms were the source of the outbreak. Fresh slivered onions on McDonald's Quarter Pounders and other items likely spawned the outbreak, per CDC.

In response to the findings, Taylor Farms issued a voluntary recall of the affected onions. McDonald's promptly removed the onions from their menu items and temporarily halted sales of Quarter Pounder hamburgers in 12 US states.

On Sunday, McDonald's announced that it would resume selling Quarter Pounder hamburgers after tests for E. coli came back negative.

The E. coli outbreak has affected 90 people, including:

- 27 hospitalizations

- 1 fatality (an elderly man in Colorado)

The E. coli bacterium causes symptoms such as:

- Stomach cramps

- Diarrhea

- Vomiting (lasting three to four days)

Most people recover without treatment, but some develop complications.

Key Facts:

- 90 people sickened

- 27 hospitalized

- 1 fatality (elderly man in Colorado)

- Slivered onions contaminated with E. coli supplied by Taylor Farms

- Onions used in McDonald's Quarter Pounders and other menu items

- Taylor Farms issued voluntary recall

- McDonald's removed onions and halted Quarter Pounder sales temporarily

- Sales resumed after negative E. coli test results

(Input from various sources)

(Rehash/Vaishnavi Dalvi/MSM)

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