The major features of the lungs include the bronchi, the bronchioles and the alveoli. The alveoli are the microscopic blood vessel-lined sacks in which oxygen and carbon dioxide gas are exchanged.

Histoplasmosis is a fungal infection caused by inhaling dust from spore-infected bird droppings. The acute form is treated with antifungal medication.

Histoplasmosis is a fungal infection caused by inhaling dust from spore-infected bird droppings. In the disseminated form, infection spreads throughout the body from the lungs. The death rate is fairly high for people with untreated widespread (disseminated) histoplasmosis, but is reduced significantly with treatment.

This is a skin lesion resulting from disseminated histoplasmosis. Histoplasmosis occurs most frequently as a lung infection, however it can infect the skin or become distributed (disseminated) to internal organs.