What Causes Pneumonia?

Yes my name is melinda, I m in the hospital with pneumonia. They have done cultures for fungal but so far it is neg. Before I was admitted I was giving 6 Rocephin shots , two steroids shots and po Meds also. A round of levaquin 750mg , z pack X 2 . Did chest X-rays x 3 first X-ray it was in bottom left lobe then move to mid lobe then full blown consolation in lung acrossing in right lung. Then was admitted and started on zosyn. It has helped a lot but they say it not bacteria and checking for fungal . So far neg. If it not viral, bacteria, or infection, what could made the pneumonia? I did have bronchitis before that wasn t clear up before it supposely turn into pneumonia. I never had any fever at any time. Sputum looks like club soda. I m just trying to upstanding this . Can you suggest anything? Thank you