A 16-Year-Old Previously Healthy Adolescent Developed Nonproductive Cough, Dyspnea, and Wheezing

question 238

Multiple Choice

A 16-year-old previously healthy adolescent developed nonproductive cough, dyspnea, and wheezing after traveling abroad.  The patient has no history of allergies and has had no recent upper respiratory illness.  The symptoms spontaneously resolved after several days, but soon after, she began having abdominal discomfort, anorexia, and nausea.  Stool microscopy results are shown in the following image: Which of the following was the most likely cause of this patient's pulmonary symptoms?

• A)Formation of cross-reacting antibodies
• B)Immune response against inhaled spores
• C)Parasite-induced cardiac dysfunction
• D)Transpulmonary migration of larvae
• E)Type IV hypersensitivity to a foreign antigen

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