Question: "The town where I live is home to a legion of pigeons, and we have many tales of people getting sick with "bird fever." I am a teacher, and I work in a very old school. I have seen two very large piles of pigeon droppings in the school's attic. I am concerned because I work on the floor directly below the attic, the ceiling of my classroom has cracks in it. Also, the school has recently installed a new air conditioning system in the attic. Am I at risk for catching bird fever?"
Answer: The fungus, Histoplasma capsulatum, can be found in pigeon droppings. Infection by H. capsulatum can cause the disease Histoplasmosis. Three fourths of those who are infected with the fungus exhibit no symptoms or show symptoms of influenza ("flu"). One quarter of those who are infected with the fungus exhibit illness of varying severity, and among these the most common illness is a pneumonia of short duration.