Three Weeks After a River Rafting Trip, Three Family Members

question 8

Multiple Choice

Three weeks after a river rafting trip, three family members experienced symptoms of coughing, fever, and chest pain. During the rafting trip, the family had consumed crayfish that they caught along the river banks. An examination of the patientsʹ sputum revealed helminth eggs, and serum samples were positive for antibodies to Paragonimus. All of the family members recovered following treatment with praziquantel. In the Paragonimus life cycle,

• A) both humans and crayfish are definitive hosts.
• B) humans are the definitive host and crayfish are the intermediate host.
• C) the source of the infection was the river water.
• D) both humans and crayfish are intermediate hosts.
• E) the crayfish are the definitive host and humans are the intermediate host.

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Definitions:

Hives

An allergic reaction that causes itchy, red welts on the skin, often triggered by medications, foods, stress, or other stimuli.

Intention-To-Treat

An approach in clinical trials where the analysis includes all participants exactly as they were allocated, regardless of whether they completed the treatment according to the study protocol.

Drop-Out Percentage

Drop-out percentage refers to the proportion of individuals who discontinue or leave a certain program, course, or activity before completion, often used in educational contexts.

After-School Program

Organized programs that invite youth to participate in activities outside of the traditional school day, often providing educational or recreational activities.