MEMPHIS, Tenn. — Health officials say the number of people diagnosed with Legionnaires’ disease in an outbreak at the hotel at Graceland has risen to nine.

The Shelby County Health Department said in late June that four people contracted the illness after staying at The Guest House at Graceland. The hotel is located on the property of the tourist attraction centered on the life of late singer Elvis Presley in Memphis, Tennessee.

The department said Wednesday the number of cases has increased to nine. The hotel’s pool and hot tub have been authorized to reopen after tests revealed no viable legionella bacteria.

People who visited the hotel between May 15 and June 26 and have symptoms should contact the department. Legionnaires’ disease has symptoms similar to pneumonia, including cough, high fever and headaches.