Diseases transmitted by bird droppings
Pollution is officially defined as loss of purity and cleanliness through contamination.
There are over 50 species of fungi which are agents of many diseases infectious to humans. Pigeons live in close association with people and frequently cause serious problems with their droppings which become serious infectious air pollutants. An infectious disease caused by a fungus is called a mycoses. When it affects the respiratory system it is called a respiratory mycoses. Examples of important respiratory mycoses are aspergillus's, blasromycosis, and histoplasmosis. A non-respiratory mycosis involving pigeons is systemic candidacies. These fungi-causing diseases are acquired by inhaling the fruiting bodies or spores along with a particle dust. The fungi live saprophytically in feces and soil. These diseases are more common than they used to be, making them an ever growing health problem.