Tick-Borne Disease Prevention & Control Lyme disease is caused by a bacterium called Borrelia burgdorferi, which is transmitted to humans through the bite of infected black-legged ticks, also known as deer ticks. In 2012, New Hampshire was reported to have the highest incidence of Lyme disease in the United States, and in recent years, Hillsborough and Rockingham counties have accounted for nearly 70% of all confirmed Lyme cases in New Hampshire. However, proper education and prevention can help reduce the number of Lyme disease cases.
Mosquito-Borne Disease Prevention & Control
West Nile Virus (WNV) is a potentially serious illness. Experts believe WNV is established as a seasonal epidemic in North America that flares up in the summer and continues into the fall. Learn More by viewing the West Nile Virus Informational Handout (PDF).