June 24, 2022: The Centers for Disease Control and Prevention has listed Fairfield, Hartford, New London, Middlesex, Tolland, and Windham Counties in Low/Green the as part of its COVID-19 Community Levels Map. Only Litchfield, Middlesex and New Haven County are listed in the Medium/Yellow category. Residents who live in the Medium /Yellow counties who are at a high risk for severe illness, should talk to their health care provider about whether to wear a mask and take other precautions. These residents should stay up to date with their COVID-19 vaccines and get tested if they have symptoms. Visit the CDC COVID-19 Community Levels Map for updates.


Connecticut Surveillance

The Connecticut Department of Public Health (CT DPH) began routine legionellosis surveillance in 1997. Since then, annually reported cases have ranged from 15-201. An upward trend in recent years shows monthly and seasonal variation as seen in the figure below. The CT DPH uses the national surveillance case definition to determine case status. Legionellosis is reportable to the CT DPH by physicians and laboratories, and to the patient’s local health department. To identify possible common sources of exposure, staff of the CT DPH Epidemiology and Emerging Infections Program conduct follow-up on all confirmed legionellosis cases by contacting the healthcare provider of record, and conducting patient interviews.

This page last updated 05/09/2022.