<prompt> A 48-year-old man presents with 3 weeks of fever, fatigue, and shortness of breath. He has a history of nasal allergies and asthma, which have been poorly controlled in the past month. Two days prior to presentation, he developed weakness in his left foot and it now drags when he walks. On examination, his blood pressure is 16590 mm Hg, pulse 100min, respirations 20min, and lungs have bilateral expiratory wheezes. There is left foot drop, and the rest of the neurologic examination is normal. Laboratory evaluation reveals ESR of 90 mmh, WBC of 14,000mL with 10 eosinophils, and 1 proteinuria. A CXR shows bilateral pulmonary infiltrates.For the above patient with vasculitis syndrome, select the most likely diagnosis.polyarteritis nodosa PANChurg-Strauss diseaseHenoch-Schonlein purpuravasculitis associated with infectious diseases  <response>: Churg-Strauss is a granulomatous vasculitis. Pulmonary involvement often dominates the clinical presentation with severe asthma attacks and pulmonary infiltrates. Peripheral eosinophilia is present in virtually all cases. 