Answer :
Final answer:
The Lyme disease bacterium is transmitted to humans from ticks, particularly, the deer tick. The ticks get the bacterium by feeding on hosts like deer or white-footed mice.
Explanation:
The Lyme disease bacterium is passed onto humans directly from e. ticks, specifically the deer tick (Ixodes scapularis). Not all deer ticks carry the Lyme disease bacterium; the probability of infection depends on the type of host upon which the tick develops. It's also noted that a higher proportion of ticks that live on white-footed mice carry the bacterium than do ticks that live on deer. Humans get infected when they are bitten by an infected tick; the other animals like deer and mice act as reservoirs or hosts for the ticks and do not directly transmit the bacterium to humans.
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