Lyme Disease CDC Report - What 2022 can Teach Us

Lyme disease, caused by Borrelia spirochetes transmitted by ticks, is the most common vectorborne disease in the United States, with the highest incidence in specific regions. CDC surveillance methods were revised in 2022, allowing high-incidence jurisdictions to report cases based solely on laboratory evidence, leading to a 1.7-fold increase in reported cases compared to the annual average during 2017-2019. The rise in reported cases was particularly notable among older age groups.

The increase in reported Lyme disease cases in 2022 is primarily attributed to changes in surveillance methods rather than a true change in disease risk. The revised case definition streamlines reporting by eliminating the need for additional clinical information, but it hampers detailed comparison with historical data. Despite the increase in reported cases, surveillance in low-incidence jurisdictions still requires clinical investigation to ensure accurate identification of locally acquired infections.

The findings underscore the importance of standardized surveillance practices to improve data comparability across jurisdictions. However, challenges such as under or over reporting and changes in laboratory testing methods may impact the accuracy of reported cases. Further efforts are needed to enhance surveillance accuracy and develop effective prevention methods given the ongoing high burden of Lyme disease in the United States.

If you or a loved one believe you have been infected by a tick with Lyme disease, please seek immediate medical attention.