Lyme disease is caused by the Borrelia burgdorferi and is transmitted by the blacklegged tick. It is the most commonly reported vector-borne disease in the United States and it is spreading across the State of Michigan. Typical clincal signs include flu-like symptoms however, if left untreated may spread to joints, the heart, and/or the nervous system. The majority of cases can be treated succesfully with antibiotics. Finding and removing ticks promtly can prevent Lyme disease.