A patient being treated at a Dallas hospital has tested positive for Ebola, the first case of the disease to be diagnosed in the United States, federal health officials announced Tuesday.

Officials at Texas Health Presbyterian Hospital say the unidentified patient is being kept in isolation and that the hospital is following Centers for Disease Control recommendations to keep doctors, staff and patients safe.

The hospital had announced a day earlier that the patient’s symptoms and recent travel indicated a case of Ebola, the virus that has killed more than 3,000 people across West Africa and infected a handful of Americans who have traveled to that region.