E. coli

Flickr user Microbe World

A Pennsylvania woman has been infected with a rare form of E. coli that is resistant to a last-resort antibiotic, typically only administered when all other antibiotics have proven ineffective.

The Porch restaurant in Oakland closed Wednesday in response to several E. coli cases among employees and customers.

The restaurant voluntarily closed for the day, but has been approved by the Health Department to re-open Thursday.

Karen Hacker, Director of Allegheny Health Department, said the restaurant is undergoing extensive cleaning.