| Lyme  disease is a potentially serious disease, and can be localized or affect  multiple bodily systems. This disease is transmitted to humans and other  animals by the feeding activities of certain ticks. Of the 47 tick species  established in California, 6 species attach to humans with any regularity, but  only the western black-legged tick, is thought to be responsible for  transmitting the spirochete to people. Yosemite Pest Control can help your  family stay tick-free.     |  |