Lyme disease is primarily transmitted to humans through the bite of infected black-legged ticks (genus Ixodes), commonly known as deer ticks. These ticks are responsible for transmitting the bacterium Borrelia, which causes Lyme disease.
While ticks are the primary vectors for transmitting Lyme disease, there have been some studies suggesting that mosquitoes and other blood-sucking insects have the potential to carry the bacterium responsible for the disease. However, their role in transmitting Lyme disease to humans is not well-established, and further research is needed to understand their significance fully.