Legionnaires’ Disease Cluster: MN Health Launches Investigation

GRAND RAPIDS, MN — The Minnesota Department of Health is investigating after a cluster of five confirmed cases of Legionnaires’ disease was discovered in people who spent time in Grand Rapids two weeks before their symptoms began.

The environmental source of the illnesses has not yet been determined, officials said.

The five cases — all adults — became ill between the end of April and mid-July, according to health investigators. All were hospitalized but no deaths have occurred so far.

Legionnaires’ disease is a bacterial pneumonia that people can get after breathing in aerosolized water containing Legionella bacteria. The disease cannot be spread by drinking water or by person to person.

MDH is working to identify possible sources of the bacteria and make recommendations for preventing any additional illnesses.

"Investigations into Legionnaires’ disease clusters can be complex," the health department said in a news release.

"Past outbreaks have been linked to various environmental water sources such as cooling towers, building plumbing systems, hot tubs and decorative fountains."

Officials said the key to preventing Legionnaires’ disease is to reduce the risk of Legionella growth and spread in water systems.

Legionnaires’ disease can be severe and require a quick diagnosis and antibiotic regimen. Symptoms include fever, chills, cough, shortness of breath, headaches, muscle aches, fatigue, weakness, loss of appetite, confusion, diarrhea, and nausea.

"People who have symptoms or are concerned about their health should contact their health care provider," said Jessica Hancock-Allen — director of the MDH Infectious Disease Epidemiology, Prevention and Control Division — in a statement.

Learn more about the disease on the MDH website.