Fungal pneumonia can be particularly difficult to treat. They form spores that are difficult to kill and they are not responsive to antibiotics -- and antifungals can be hard on your liver. Unlike most bacterial or viral types of pneumonia, fungal pneumonia can destroy lung tissue. It can cause cavitary lesions similar to tuberculosis. The good news is that, like TB, your immune system can wall off the fungi in a granuloma (a ball of scar tissue). The bad news is that once it's there, it's pretty much there for life. That hard ball of scar tissue traps the spores and keeps them from causing any further damage, but the nodules stay there.
The most important thing that determines your course is what the particular fungus is in the first place and whether or not your immune system is compromised. Some fungi don't really cause much damage; others are a real bastard. All of them can take a long time to treat. Mold just plain doesn't die as easily as bacteria.
Fungal pneumonia is the major concern with cold aerosol humidifiers and hookahs. The case of cold-mist humidifiers, they produce droplets that can carry mold spores and bacteria. You inhale those and boom -- pneumonia. With hookahs, it's similar: The water bath is NOT a filter, it's a warm wet environment that is perfect for mold to grow. The bubbling during inhalation creates aerosol particles. Those too can carry spores that can be inhaled. If you have a cold mist humidifier (one that spits and hisses and makes a mist cloud), get rid of it. If you have recently smoked from a hookah, your doc should know that to better inform your treatment.
Respiratory therapist (B.S., RRT, RPFT)
Working on my master's in nursing.