The tennis camp counselor diagnosed with E. coli in late June contracted the illness while at Penn State, a university spokeswoman said Thursday.

The counselor with the confirmed E. coli case arrived June 19 and got sick while in State College, Penn State spokeswoman Lisa Powers said.

Powers said a second counselor at the camp returned home after camp with stomach problems. His mother told Penn State he had E. coli, Powers said, though the counselor never had a culture or test done to determine if he had the illness.

Penn State has not determined whether the case has been confirmed as E. coli poisoning or not, Powers said.

There was an indication that three other counselors reported digestive system problems, Powers said, but none of them reported having E. coli.

The first counselor visited Mt. Nittany Medical Center June 29, where it was determined she contracted E. coli, a serious form of food poisoning.

The counselor, a New York resident, began feeling sick June 26 and was admitted to the hospital four days later, Powers said.

The incubation period before individuals begin to show E. coli symptoms is about three to four days, according to the Centers for Disease Control’s website.

Penn State is working with the Pennsylvania Department of Health because the second sick counselor is a Pennsylvania resident, Powers said.

Lab reports will also be able to determine if the two cases involve the same strain of E. coli — there are more than 700, and most are harmless — to see if there was a common source for the illnesses, Powers said.

Both Penn State’s University Health Services and the Mt. Nittany Medical Center Emergency Room have been alerted in case of additional cases.

Findlay Commons, in East Halls, provides food for all participants at Penn State sports camps, which currently enroll more than 1,400 individuals, Powers said.

There hasn’t been a case of food poisoning at Penn State in at least 31 years and probably longer, she said.

“It would be really unusual because we have so many university food health protocols in place,” Powers said Wednesday.