<prompt> A 23-year-old man is experiencing a flare of his asthma. He is using his salbutamol inhaler more frequently than usual and despite increasing his inhaled steroids he is still short of breath. Previously his asthma was considered mild with no severe exacerbations requiring oral steroids or hospitalization. With his flare, he has recurrent episodes of bronchial obstruction, fever, malaise, and expectoration of brownish mucous plugs. On examination, there is bilateral wheezing. The heart, abdomen, neurologic, and skin exams are normal. CXR reveals upper lobe pulmonary infiltrates; the eosinophil count is 3000mL, and serum precipitating antibodies to Aspergillus are positive. Which of the following is the most likely diagnosis?ascaris infestationallergic bronchopulmonary aspergillosisChurg-Strauss allergic granulomatosisLoefflers syndrome  <response>: Allergic bronchopulmonary aspergillosis in asthmatics, parasitic reactions, and drugs are known causes of pulmonary eosinophilia. Idiopathic causes include Loefflers syndrome benign, acute eosinophilic pneumonia, chronic eosinophilic pneumonia, hyper eosinophilic syndrome, and Churg-Strauss allergic granulomatosis. 