In addition, there have been cases where individuals
> had exposure to bats in their bedrooms while asleep, had no history of
> bites, and contracted rabies. How this happens is unclear

It has been documented that you can contract rabies from aerosolized bat
urine, but it is thought that it needs to be a heavy innoculation that way.
But, that is one possibility if you cannot find a bite mark.

Ron McCluskey
Cheney, WA