What Is Hypersensitivity Pneumonitis?
Reviewed: Dr. Gromatzky
3. Allergens
There are more than 300 particles that can cause hypersensitivity pneumonitis that we know of. They can be at work, they can be outside, and they can even be in your home. You might also be breathing in certain particles for years before you develop an allergy to them.
The particles that can cause the reaction can come from a wide range of sources. In some cases, they can come from the fur of animals. For other people, it is feathers, and bird droppings that can be a problem. Mold on hay and grain can sometimes be a problem, as can fungi in air conditioning, and heating systems. Bacteria in water vapor are a problem for some people also.
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