(Photo by Joe Raedle/Getty Images)

A second case of norovirus has been connected to a Chipotle restaurant in Virginia that temporarily closed following reports of sick customers.

David Goodfriend, the director of the Loudoun County Health Department, said on Monday that a second person has tested positive for the same strain of norovirus after eating at the fast casual spot before it was shut down for Monday and Tuesday of last week, reopening on Wednesday after a complete sanitization of the location.

“Based on symptoms reported and these preliminary laboratory results, the cause of the outbreak is believed to be norovirus, though the specific source of the norovirus has not yet been identified,” said Goodfriend.

Norovirus is the most common cause of foodborne illness, according to the Centers for Disease Control, contracted through infected people, or contaminated food, liquids, or surfaces.

The Loudoun County Health Department has identified more than 135 people who reported becoming ill after eating at the Sterling Chipotle between July 13 and 16, according to a statement from the agency. Goodfriend said that the department does not know of anyone becoming ill after eating at the restaurant once it reopened.

Chipotle alerted local health officials last week about the “small number of reported illnesses,” according to an emailed statement from Chipotle’s director of food and safety, Jim Marsden.

Other area locations of Chipotle were unaffected by the closure on Tripleseven Road in Sterling.

The chain is still working to win back customers after an E.Coli outbreak in the summer of 2015. Last week was a bad one for public relations. In addition to the temporary shut down in Sterling, a video circulating last Thursday showed rodents falling from the ceiling of a Dallas location.

A Credit Suisse tracker of the brand’s online sentiment found public perception of the brand reached record lows in the wake of these incidents, according to CNBC. Additionally, the Chipotle stock lost nearly 13 percent of its value last week.