This is very basic answer, but any insect that bites can be harmful. If you know it can bite, or if it has bitten you, then you know it can or already has bitten probably quite a few other things. These other things have germs and diseases on their skin or in their fur just as humans do. This means that the tic harbors them in their bite.
Well, lime disease is a main one.
Rabies, yes. Lyme disease, however, is borne by deer (I think) tics.
i dont see it being harmful, there are deer eating the apples that fall on the ground around my parents' apple trees every year.
Tics may be motor or vocal
the mosquito is the tics predator. they get rid of them
Tics usually occur in "bouts" with many tics over a short interval of time
a broken clock that only tics
Yes, all mammals can have tics.
Complex motor tics appear slower and more deliberate than simple motor tics
Simple vocal tics are meaningless sounds or noises
There have been some people who reported tics or nervousness after using loratadine. However, the complaints were few and the tics disappeared after stopping the medication.
Can you construct a food web which includes tics?