Lyme Disease
Lyme disease is caused by Borrelia burgdorferi, a bacterium carried in the gut of certain ticks. When these infected ticks attach to the human body (often in armpits, groin, scalp, or other hairy, hidden body areas), they slowly feed, and within 36-48 hours they may transmit B. burgdorferi to their human host. Young ticks are especially abundant and are seeking hosts in late spring and early summer, although adult ticks can transmit infection as well.
https://www.news-medical.net/health/Lyme-Disease.aspx