Fungus in the lung is caused by breathing the fungus into the lungs, according to HowStuffWorks. There are three main types of fungus that may affect the lung: histoplasmosis fungus, aspergillosis fungus and coccidiomycosis fungus.
Symptoms associated with histoplasmosis fungus include coughing, chest pain, fever, night sweats and hoarseness, claims HowStuffWorks. Weight loss, fatigue and pain in the joints may also be present. Histoplasmosis fungus is diagnosed by running tests, such as an antibody test, on a sample of the tissue that is infected. Aspergillosis fungus is often associated with chest pain, breathing difficulties, headache and fever. Night sweats and coughing up blood also sometimes occur. This fungus is also diagnosed by running a culture of the infected tissue.
The symptoms of coccidiomycosis fungus are a bit different than the other lung fungi, explains HowStuffWorks. In this case, lesions begin in the lungs and then spread outwards, eventually spreading throughout the body. It is imperative to treat this fungus before it begins to spread. In patients who are immune to coccidiomycosis, the infection clears up on its own. It is important that people see a doctor for a proper diagnosis if they experience any symptoms associated with fungal infections in the lungs.