Final answer:
Lyme disease is a bacterial infection transmitted by a vector, specifically deer ticks that carry Borrelia burgdorferi. It's contracted through tick bites, with potential symptoms including a bullseye rash.
Step-by-step explanation:
Lyme disease is a condition that is transmitted to humans by the bite of infected deer ticks. This is an example of an infectious disease transmission by a vector. The bacterium responsible for causing Lyme disease is called Borrelia burgdorferi, and deer ticks act as the biological vector for this pathogen. In the environment, ticks acquire the bacteria by feeding on infected hosts such as mice, particularly the white-footed mouse. The ticks can then transmit the bacteria to humans when they bite. Lyme disease is characterized by symptoms such as a bullseye rash and can cause serious health problems if left untreated.