UNO’s note says the 13 athletes were tested Friday.

The University of Nebraska-Lincoln has at least eight sororities and one fraternity in quarantine because some members in those houses have tested positive.

A source close to UNL’s Greek system said a 10th Greek house, FarmHouse Fraternity, was placed in quarantine Wednesday.

Iowa Gov. Kim Reynolds said at a press conference Wednesday that the rate of young adults testing positive for coronavirus has rocketed in counties where there are large colleges.

Last week, Reynolds closed bars in six counties, including Johnson and Story Counties. Johnson is home to the University of Iowa and Iowa State is in Story County. She said Wednesday that her state had the highest rate of increase in cases in the nation last week.

She said she will take further protective steps if those numbers remain high.

UNO reported that through Tuesday, 38 students and nine employees there have tested positive this summer. The University of Nebraska-Lincoln reported 245 positive results among students, faculty and staff through August.