---
title: "49 people infected! McDonald's hamburger outbreak of E. coli, stock price plunges after hours"
type: "News"
locale: "zh-HK"
url: "https://longbridge.com/zh-HK/news/217561023.md"
description: "Just after Trump sold his fries, McDonald's ran into trouble? An E. coli infection incident related to McDonald's occurred in 10 states in the United States, causing McDonald's stock price to plummet more than 9% after hours"
datetime: "2024-10-23T00:39:58.000Z"
locales:
  - [zh-CN](https://longbridge.com/zh-CN/news/217561023.md)
  - [en](https://longbridge.com/en/news/217561023.md)
  - [zh-HK](https://longbridge.com/zh-HK/news/217561023.md)
---

> 支持的語言: [简体中文](https://longbridge.com/zh-CN/news/217561023.md) | [English](https://longbridge.com/en/news/217561023.md)


# 49 people infected! McDonald's hamburger outbreak of E. coli, stock price plunges after hours

McDonald's signature burgers cause E. coli infections in multiple locations in the United States, with the company's stock price plummeting after hours.

On Tuesday, the Centers for Disease Control and Prevention (CDC) in the United States announced that an E. coli outbreak in 10 states has infected 49 people, hospitalized 10, and resulted in 1 death. Those infected all reported having eaten at McDonald's during interviews conducted as part of the investigation.

**Following the news, McDonald's stock plunged more than 9% after hours.**

The CDC stated that all infected individuals tested positive for the "O157:H7" strain of bacteria. Symptoms of the infection include diarrhea, stomach cramps, vomiting, and fever. The investigation will focus on the onions and beef patties in McDonald's signature "Quarter Pounder" burger.

Later, McDonald's released a statement indicating that the company is taking swift and decisive action in response to the E. coli infections in certain states in the U.S. Preliminary investigation results suggest that **some illnesses may be linked to the sliced onions in the Quarter Pounder burger**, leading affected restaurants in the region to remove the Quarter Pounder from their menus.

The United States is McDonald's largest market, with over 13,000 company-operated and franchised stores. In the year ending in late June, McDonald's global sales approached nearly $26 billion

### 相關股票

- [McDonald's (MCD.US)](https://longbridge.com/zh-HK/quote/MCD.US.md)

## 相關資訊與研究

- [Top McDonald’s Executive Unloads Chunk of Shares in High-Value Stock Move](https://longbridge.com/zh-HK/news/280407570.md)
- [McDonald's must face Black ex-executives' harassment, retaliation claims](https://longbridge.com/zh-HK/news/279679742.md)
- [Warren Buffett Bet Big On Oil In Q4: Here's How Much Berkshire Hathaway Is Up On Chevron Stock In 2026](https://longbridge.com/zh-HK/news/281213097.md)
- [Chevron's downstream assets at Wheatstone gas facility suffer extensive damage due to cyclone](https://longbridge.com/zh-HK/news/281102812.md)
- [Boston Common Asset Management LLC Raises Holdings in Lowe's Companies, Inc. $LOW](https://longbridge.com/zh-HK/news/281150529.md)