Which environmental condition promotes aspergillosis in birds?

• A. Damp organic material
• B. Dry air
• C. High temperature
• D. Bright light

Answer: (A)

Aspergillosis in birds is driven by mold growth, which spreads most when organic material is damp. When litter, bedding, feed, or debris stays moist, mold such as Aspergillus grows and releases spores into the air. Birds inhale these spores and can develop a respiratory infection, especially if they are stressed, housed in poor-ventilated spaces, or have other health issues. The key preventative takeaway is to keep environments dry, clean, and well-ventilated, removing damp material and preventing moldy feed or bedding from accumulating.

Dry air and bright light generally don’t promote mold growth the same way moisture does, and while high temperatures can accelerate mold if moisture is present, the main factor here is damp organic material.