Inhalation of what hazard from bat activity can be harmful?

• A. Bacteria
• B. Viruses
• C. Spores
• D. Prions

Answer: (C)

When bats roost, their droppings build up into guano, which can be rich in fungal spores, especially Histoplasma capsulatum. If this material is disturbed, the spores get airborne and can be inhaled. Inhaling these fungal spores can cause histoplasmosis, a lung infection, making spores the hazard most closely linked to bat activity. Bacteria and viruses can be present in guano, but the inhalation risk most associated with bat habitats is fungal spores. Prions aren’t tied to bat guano or this exposure route.

Practical note: avoid disturbing heavy guano buildup, wet-clean to minimize dust, and use proper respiratory protection if you must enter areas with bat droppings.