Nine McHenry County residents were diagnosed with Legionnaire’s disease between June 7 and July 1, according to a report released Tuesday by the McHenry County Department of Health.
The patients are from various locations throughout the county and range in age from 46 to 82 years old. An investigation with the Illinois Department of Public Health into these cases is underway, according to the report.
The exact locations of these patients cannot be released at this time, and no long-term-care facilities were involved, said Keri Zaleski, community information coordinator for the McHenry County Department of Health.
Even so, the health department has alerted local facilities and health care providers of the outbreak.
McHenry County saw four cases of the disease in 2017, nine in 2016 and three in 2015, Zaleski said.
The Illinois Veterans’ Home in Quincy has seen 13 deaths related to the disease since 2015. At this time, there have been no deaths reported for this year in the county, Zaleski said.
Legionnaire’s disease is caused by Legionella bacteria typically found in freshwater environments, and transmitted through breathing in contaminated vapor or mist, according to the release. The disease occurs more frequently in hot or humid weather.
Symptoms usually take two to 10 days to appear, and can include muscle aches, diarrhea, nausea, vomiting, fever and chills.
The health department advises anyone experiencing these symptoms to seek medical help.