Life Cycle of Tick (image) University of Illinois College of Agricultural, Consumer and Environmental Sciences Share Print E-Mail Caption The life cycle of the Ixodes scapularis commonly known as the deer tick or the black-legged tick. Lyme disease is caused by the spirochete Borrelia burgdorferi which is transmitted by an infected vector tick to a host during feeding. Credit University of Illinois Usage Restrictions None Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.