My aunt rescues cats and at a time has a minimum of 100 cats in her basement, well my uncle has been extremely ill for about a year now.  He, however, has always been overweight and a smoker.  He has been to doctor after doctor and no one can tell him what is wrong, but he also leaves out the fact that he lives with so many cats.  Since he was first hospitalized for difficulty breathing I have said he needs to move out of that house and I bet a million dollars he would start to feel better.  He now has water around his heart, he cannot get his blood sugar under control, and they have diagnosed him with COPD.  I know breathing in cat urine is harmful especially in such high concentrations cause of the amonia within it, but what are some other possible diseases from cats, their urine and feces, and the kitty litter? Maybe with some facts that the cats could be making him ill he will actually speak to the doctor about it.
Thanks for asking your question I completely understand your problem COPD is a common disease nowadays due to increase in smoking habit first u need to quit smoking according to the stage of disease inhaled Chat Doctor.  U need to visit a pulmonologist who can guide you was and when to start. About diseases caused by cats, actually cats dander can cause some type of interstitial lung disease which can also be diagnosed by spirometry, still the best option ll be consulting a pulmonologist who can request for a ct scan to accurately diagnose IDs don't panic all these diseases are treatable thanks/ regards feel free to ask more questions may god bless your family with good health