Fresh bat feces, known as guano, can carry a fungus called histoplasmosis, which can cause a lung illness in humans if inhaled. Touching bat guano is likewise harmful and should be avoided at all costs! Chest ache, fever, dry cough, joint paint, and red lumps on the lower legs are all symptoms of histoplasmosis. Shortness of breath, profuse sweating, and bloody coughing are some of the more severe symptoms. Children, the elderly, and those with weakened or damaged immune systems are at higher risk. Histoplasmosis can potentially be contracted more than once.