Like any wild animal that is found in Michigan, bats can be afflicted with a number of parasites. Bats can carry insects such as mites, fleas and bat bugs. These insects feed on all of the bat species found in Michigan, and are most frequently associated with bats that roost in colonies, such as the Big Brown Bat.
Bat bugs are a specific species of insect that is related to the bed bug that afflicts humans. They look almost identical to bed bugs and a microscope is required to differientiate the species.
In general, bat bugs perfer bats as their primary host. However, they may feed on other animals, and will bite humans in the absence of their primary hosts.
In order to control bat bugs, the bat colony must be evicted from the home. Otherwise, the primary host is available as a food source for the bugs.