This guideline covers diagnosing and managing Lyme disease. It aims to raise awareness of when Lyme disease should be suspected and ensure that people have prompt and consistent diagnosis and treatment. It does not cover preventing Lyme disease.
Lyme disease (Lyme borreliosis) is a tick-borne infectious disease. It is caused by different genospecies of Borrelia including B. burgdorferi sensu strictu (ss), B. afzelii and B. garinii, which can be transmitted to humans through a bite from an infected tick. Infection is more likely the longer a tick is attached to the skin. Ticks live in grassy and wooded areas, both in rural and urban locations. People who spend time in these areas for work or recreation are at increased risk of tick exposure.