Three Weeks After a River Rafting Trip,three Family Members Experienced

question 30

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

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Definitions:

Nervous Systems

Complex networks of nerves and cells that transmit signals between different parts of an organism's body to coordinate behavior.

Cerebral Areas

Regions within the brain, each responsible for various functions such as memory, speech, and decision-making.

Temporal Lobes

Region of the cerebrum that contains the auditory areas.

Occipital Lobes

Posterior areas of the mammalian cerebrum; interpret visual stimuli from the retina of the eye.