A 19-Year-Old Man Comes to the Physician Due to Diarrhea

question 237

Multiple Choice

A 19-year-old man comes to the physician due to diarrhea for the last 4 months.  He visited a student health clinic at his university a month ago and was prescribed a course of antibiotics, but his diarrhea failed to improve.  He also has persistent nausea, a bloating sensation, and a 6.8-kg (15-lb) weight loss.  Microscopic examination of his stool for ova and parasites following trichrome staining is shown in the exhibit. 
Impairment of which of the following immune functions would most likely predispose to this patient's infection?

• A)Bacterial killing by neutrophils
• B)CD8+ T lymphocyte-mediated cytotoxicity
• C)Eosinophil-mediated cytotoxicity
• D)Membrane attack complex formation
• E)Secretory IgA production

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Definitions:

Cooperatively

Working together willingly and effectively towards a common goal or outcome.

Ideas

Mental concepts or thoughts that represent a potential course of action, an invention, or a solution to a problem.

Behaviorally Flexible

The capacity to adapt one's behavior and actions to accommodate different situations or environments.

Upper-management Level

Refers to the highest tier in an organization's hierarchy, typically responsible for strategic planning and decision-making.