Officials released an update Tuesday after testing revealed the presence of Legionella in the Oakland County courthouse last week.

Testing has confirmed the presence of Legionella bacteria at the Oakland County Courthouse in Pontiac, officials announced.

The testing came after an employee tested positive for Legionnaires’ disease. The building is not open to the public, officials said.

The early and extended closure of school buildings has also heightened the risk of legionella. Legionella is the bacteria that causes Legionnaires' disease, and it has been detected in several schools near Dayton, Ohio, and in a Pittsburgh suburb. “These things happen with old buildings or buildings that aren’t used often, so, I mean, we trust the experts that they flushed the system,” parent Derek Coatney said. Officials said those guidelines, including testing and flushing water systems, can apply to schools. Hot tubs or spas that have been shut down in gyms could also be a legionella risk.

ROYAL OAK, Mich. A patient at Beaumont Hospital in Royal Oak was recently diagnosed with Legionnaires' disease. RELATED: High levels of Legionella discovered in Michigan State University veterinary buildingPeople can get Legionnaires' disease when they breathe in small droplets of water in the air that contain the bacteria. What to know about Legionnaires' diseaseLegionella bacteria do not spread from one person to another and Legionnaires' disease doesn't come from drinking water. People can get Legionnaires' disease when they breathe in small droplets of water in the air that contain the bacteria. Anyone with the symptoms of Legionnaires' disease is asked to make an appointment with their doctor.

ROYAL OAK, Mich. - A patient at Beaumont Hospital in Royal Oak was recently diagnosed with Legionnaires' disease. RELATED: High levels of Legionella discovered in Michigan State University veterinary buildingPeople can get Legionnaires' disease when they breathe in small droplets of water in the air that contain the bacteria. What to know about Legionnaires' diseaseLegionella bacteria do not spread from one person to another and Legionnaires' disease doesn't come from drinking water. People can get Legionnaires' disease when they breathe in small droplets of water in the air that contain the bacteria. Anyone with the symptoms of Legionnaires' disease is asked to make an appointment with their doctor.

EAST LANSING, Mich. - High levels of Legionella bacteria were discovered in a cooling tower at the Michigan State University Veterinary Diagnostic Laboratory. No humans or animals have been affected by the Legionella bacteria. It is the first time high levels of Legionella bacteria have been present in the building. What to know about Legionnaires' diseaseLegionella bacteria do not spread from one person to another and Legionnaires disease doesn't come from drinking water. Anyone with the symptoms of Legionnaires' disease is asked to make an appointment with their doctor.

ATLANTA (CNN) - An outbreak of Legionnaires' disease tied to a prominent Atlanta hotel is the largest recorded Legionella outbreak in Georgia, a public health official told CNN on Sunday. The cases involve people who stayed at or visited the downtown hotel between June 12 and July 15, Nydam said. Legionnaires' disease is treated with antibiotics, and most people who get sick make a full recovery, according to the state health department. About one in 10 people with Legionnaires' disease dies, according to the US Centers for Disease Control and Prevention. About 7,500 US cases of Legionnaires' disease were reported to the CDC in 2017, the agency said, adding that it's likely an underestimate because the illness is underdiagnosed.