"It does beg the question: How is it that Chipotle has been struck by Norovirus, Salmonella, and E.coli in different locations throughout the country, in such short order?" independent consultant ...

An curved arrow pointing right. After several reported cases of food poisoning at various Chipotle Mexican Grill locations, the fast-casual titan has hired a laboratory to improve cooking methods ...

The first reports of E. coli sickening Chipotle customers were revealed in October. Three months and thousands of tests later, health investigators still can't find the source of the outbreak ...

Chipotle Mexican Grill has temporarily closed over 40 restaurants in Washington and Oregon. Health officials are investigating an E. coli outbreak linked to Chipotle restaurants. Photo: Getty Images.

Here's the full number of confirmed infections by state in 2014, per 100,000 people: The E. coli outbreak traced to Chipotle sickened 52 people in 9 states, mostly in Washington and Oregon.

The biggest stories of the day delivered to your inbox.

Please purchase a Premium Subscription to continue reading. To continue, please log in, or sign up for a new account. We offer one free story view per month. If you ...

The Great Chipotle E. Coli Scare Of 2015 The strengths of Chipotle's approach to food and business turned it into a wildly ...

Chipotle stock is a 'Buy' with strong fundamentals, growth potential, and attractive valuation. Read an investment analysis ...

An curved arrow pointing right. After a devastating e. coli and salmonella bout, Chipotle's sales have netted a loss. The fast-casual chain is reportedly discussing the addition of chorizo to the ...