What Does This Result From Chest X-ray Indicate?

My son is 25 month old and as double lobe pheumonia and reoccurring chest infections and is astma tic he s under going test for cystic fibrosis he s had a chest xray and it s shows that he s got thicking in the bronichal wall in the past 6 weeks he s on his 2nd lot of antibiotics and steroids