<prompt> Pneumactocele is commnly found in case of-Pneumocystis jirovecii pneumoniaStaphylococal pneumoniaKlebsiella pneumoniaPseudomonas pneumonia  <response>: Pneumocystis jirovecii pneumonia can present with progressive dyspnoea,dry cough fever.Chest X ray shows bilateral interstitial infiltrate spreading out from hilar region.High resolution CT is more sensitive,showing typical ground-glass interstitial infiltrates.Pneumatocoeles can occur and may rupture,resulting in a pneumothorax.Treatment is with high dose co-trimoxazole,together with adjunctive steroids. Reference:Davidsons Medicine-22nd edition,page no:400. 