Perhaps you’ve heard that bat feces (also termed ‘bat guano’) can be harmful to humans. Or, maybe you’ve been told to stay away from caves or abandoned mines because of the dangerous accumulations of guano that can be present there.
Is there any truth based on these warnings? Is bat poop dangerous to people?
Bat poop is dangerous to humans. Old piles of guano can contain spores that are known to cause a condition known as Histoplasmosis. Histoplasmosis is a potentially fatal disease that can be contracted without the victim even knowing it. While human Histoplasmosis infections originating from bat guano are not thought to be very common, there have been documented cases stretching back for decades.