The nurse understands the primary diagnostic characteristic of pertussis as being which finding?
1. Raised red rash
2. A whoop sound on inspiration
3. Gagging and vomiting
4. Tightening of the jaw muscles
Correct Answer: 2
Rationale 1: The primary diagnostic characteristic of pertussis is not a raised rash. This might be measles.
Rationale 2: This is correct; hence its name, "whooping cough."
Rationale 3: These symptoms represent can occur with pertussis but are not the signature findings..
Rationale 4: The symptoms describe "lockjaw."
Global Rationale: Pertussis begins with a low-grade fever and irritated cough and progresses to spasmodic coughing episodes characterized by an inspiratory "whoop," leading to the common name "whooping cough." The coughing episodes are productive and may be induced by laughing, talking, or activity in children, and lead to gagging or vomiting. Rash and tightening of the jaw muscles are not associated with pertussis.
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