May 20, 2022: the Centers for Disease Control and Prevention listed six Connecticut Counties in the High/Orange category as part of its COVID-19 Community Levels Map. Only Fairfield and Tolland Counties are listed in the Medium/Yellow category. Residents in these counties should wear a mask indoors in public; stay up to date with COVID-19 vaccines and get tested if they have symptoms. Additional precautions may be needed for residents who are at high risk for severe illness. Visit the CDC COVID-19 Community Levels Map for updates.

Lyme Disease Annual Statistics

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The Connecticut Department of Public Health has maintained comprehensive Lyme disease surveillance since 1987. To define the epidemiology of Lyme disease in Connecticut and follow disease trends, surveillance methods were modified and enhanced over time as surveillance goals and resources changed. Surveillance has included passive and active methods that incorporated physician-reporting (1987-present) and laboratory-reporting (1998-2002, 2006-present) components. These data reflect cases meeting the national surveillance case definition for monitoring purposes. Since Lyme disease may be suspected based on broader clinical criteria, these data do not reflect all persons diagnosed or treated.

 

Understanding Lyme disease Surveillance (CDC)

 

National Lyme disease Surveillance Case Definition (CDC) 

 

National Data and Downloadable Datasets (CDC)

 

 

Excel Spreadsheets

 

Number of Confirmed and Probable Lyme Disease Cases by Year, Month, and County, Connecticut, 2009-2018

 

Annual Cases and Rates by Town and County

 

All reports are in PDF.

 

2020

2019

2018

2017

2016

2015

2014

2013

2012

2011

2010

2009

2008

2007

2006

2005

2004

2003

2002

2001

2000

1999

1998

1997

1996

1995

1994

1993

1992

1991

 

Graphs

Maps