Lyme Disease in Connecticut: Why It Remains a Hotspot
Connecticut remains one of the historic centers of Lyme disease
Persistent hotspots have been identified across multiple towns
Targeted prevention may help reduce ongoing exposure risk
Connecticut remains one of the most recognized Lyme disease hotspots in the United States decades after the first cases were identified in the town of Old Lyme.
Despite ongoing public health efforts, Lyme disease continues to affect thousands of residents throughout the state each year.
Researchers studying long-term Connecticut Lyme disease patterns have identified persistent clusters of infection involving both eastern and western regions of the state.
Researchers identified persistent Lyme disease hotspots in Connecticut
Since 1977, “in spite of all endeavors conducted by the Connecticut Department of Public Health (CTDPH) to control the disease, it remains endemic with substantial morbidity rates,” wrote Mollalo and colleagues in their spatial analysis of Lyme disease incidence in Connecticut.
The investigators analyzed 24 years of Lyme disease data to better understand how infection clusters changed over time across Connecticut towns.
Their goal was to identify persistent hotspots where targeted public health interventions might reduce disease burden.
Using exploratory spatial data analysis, the authors found that Lyme disease clustering occurred predominantly in eastern and western Connecticut, with fewer cases occurring in central regions.
Learn more about Lyme disease prevention and Lyme disease symptoms.
Several Connecticut towns remained persistent hotspots
Several towns including Chaplin, Windham, and Scotland were persistently identified as high-incidence clusters throughout the study period.
Neighboring towns including Andover, Columbia, and Lebanon were also repeatedly recognized as high-rate clusters.
According to the authors, these areas “were almost persistently affected by a high incidence of Lyme disease during the 24 years of study and therefore deserve closer consideration.”
Targeted intervention strategies may help focus prevention resources in towns with persistently elevated infection rates.
Lyme disease remains endemic in Connecticut
Between 1991 and 2014, Connecticut reported more than 54,000 human Lyme disease cases.
Because Lyme disease is believed to be significantly underreported, the true number of infections may have been substantially higher.
The persistence of Lyme disease clusters decades after the first recognized outbreak in Old Lyme highlights the ongoing challenges associated with tick exposure, diagnosis, prevention, and public awareness.
Learn more about delayed Lyme disease diagnosis and Lyme disease misdiagnosis.
Why Connecticut remains vulnerable to Lyme disease
Connecticut’s wooded environments, expanding deer populations, suburban development patterns, and outdoor recreational exposure continue to contribute to ongoing tick-borne disease risk.
Ticks carrying Borrelia burgdorferi remain widespread throughout many Connecticut communities.
Residents may not recall a tick bite because immature ticks can be extremely small and difficult to detect.
Early recognition of symptoms and prevention strategies remain important in endemic regions.
Frequently Asked Questions
Why is Connecticut associated with Lyme disease?
Lyme disease was first recognized near the town of Old Lyme, Connecticut, during the 1970s and remains highly prevalent throughout the state.
Is Lyme disease still common in Connecticut?
Yes. Connecticut continues to report significant numbers of Lyme disease cases and remains an endemic region for tick-borne illness.
What areas of Connecticut have high Lyme disease rates?
Studies have identified persistent Lyme disease hotspots in both eastern and western Connecticut towns.
Why are Lyme disease cases underreported?
Many Lyme disease cases may not be formally diagnosed or reported, leading experts to believe the true number of infections is substantially higher than surveillance estimates.
Can Lyme disease occur without a known tick bite?
Yes. Many patients do not recall a tick bite because ticks may be extremely small and difficult to detect.
Clinical Takeaway
Connecticut continues to experience persistent Lyme disease hotspots decades after the first recognized outbreak in Old Lyme.
Ongoing prevention efforts, early recognition, and targeted public health strategies remain important in reducing Lyme disease risk in endemic regions.
Related Articles
These related articles explore Lyme disease prevalence, endemic regions, tick-borne coinfections, and prevention strategies.
Survey Finds Most Connecticut Residents Are Unaware of Babesia and Anaplasmosis
High Prevalence of Babesia microti in Suffolk County, New York
Delayed Lyme Disease Diagnosis
Lyme Coinfections
Persistent Lyme Disease
References
- Mollalo A, Blackburn JK, Morris LR, Glass GE. A 24-year exploratory spatial data analysis of Lyme disease incidence rate in Connecticut, USA. Geospat Health. 2017;12(2):588.
Dr. Daniel Cameron, MD, MPH
Lyme disease clinician with over 30 years of experience and past president of ILADS.
Symptoms • Testing • Coinfections • Recovery • Pediatric • Prevention
