Question category: Respiratory
A 52 year old presents with shortness of breath wheeze and nocturnal cough. He has noticed coughing up blood on several occasions. He also complains of feeling generally unwell with a headache and fever. Bloods reveal an elevated eosinophil count and IgE. Skin testing and serology are positive for aspergillus. A CXR is awaited. What is the most likely diagnosis?