Allergic alveolitis
Allergic
alveolitis is a collective name for a number of allergic
pulmonary disorders caused by minuscule substances, often fungi and
animal proteins. These substances are so small that they can enter
the airways, where they cause an inflammatory reaction. Alveolitis
is fairly rare. An example is pigeon fanciers lung, a disorder
caused by extremely small dust particles in the droppings in a
dovecote.

