<prompt> All of the following are diagnostic features of allergic bronchopulmonary aspergillosis ABPA, EXCEPT:Peripheral eosinophiliaChanging pulmonary infiltratesSerum precipitins against Aspergillosis fumigantsOccurrence in patients with old cavitatory lesions  <response>: Bronchopulmonary aspergillosis results from an allergic pulmonary reaction to inhaled spores of Aspergillus fumigatus. It is characterized by the presence of eosinophilia, chest x ray shows fleeting eosinophilic infiltrates mainly in the upper lobe of the lungs. Bronchopulmonary aspergillosis does not occur in old cavitary lesions. Ref: Harrisons Internal Medicine, 18th Edition, Chapter 254 ; CURRENT Diagnosis and Treatment in Pulmonary Medicine, Chapter 38 