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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Definitions:

Kinked-demand Curve

A demand curve that has a distinct bend or kink at a certain price level, often used to describe oligopolistic markets where firms face a different elasticity of demand for price increases versus price decreases.

Relatively Elastic

Describes a situation where the quantity demanded or supplied of a good or service changes significantly due to a small change in price.

Relatively Inelastic

This term describes a situation where the demand for a good or service changes by a smaller percentage than the changes in price, indicating that consumers are less sensitive to price changes.

Total Revenue

The total income generated by a company from its business activities, calculated as the unit price multiplied by the number of units sold.