By The Associated Press  Full Story from the Billings Gazette  GREAT FALLS – Health officials say the “stomach flu” that has been making the rounds in Great Falls is very likely norovirus, the viral gastroenteritis that has plagued Yellowstone County.

Although Cascade County has reported just two cases of the virus within the last month, Dr. Ray Geyer said he suspects the numbers are much higher. Geyer is a Great Falls Clinic physician who specializes in infectious diseases.

When there’s an outbreak of diarrhea in a nursing home, only a couple of cases are tested, he said.

“If two tests are positive, chances are, they all have it,” Geyer said. “We have an outbreak at a nursing home almost every winter.”