A 10-Year-Old Boy Is Brought to the Emergency Department Due

question 45

Multiple Choice

A 10-year-old boy is brought to the emergency department due to respiratory distress.  Over the past 6 hours, rapid, noisy breathing has progressively developed.  Temperature is 40.1 C (104.2 F) , blood pressure is 105/75 mm Hg, pulse is 120/min, and respirations are 32/min.  Examination shows inspiratory stridor and supraclavicular retractions.  Lateral neck x-ray is shown in the exhibit. 
The patient is admitted to the hospital, and blood cultures are obtained.  If blood cultures are positive, which of the following would most likely be seen on Gram stain?

• A)Gram-negative cocci in pairs
• B)Gram-negative coccobacilli
• C)Gram-negative rods in chains
• D)Gram-positive cocci in chains
• E)Gram-positive cocci in clusters

---

Definitions:

Type I Error

The incorrect rejection of a true null hypothesis, also known as a "false positive."

Critical Values

Thresholds or boundaries in statistical tests that define the region where the null hypothesis can either be rejected or not rejected.

National Survey

A large-scale survey conducted across a nation to collect various data from a representative sample of its population.

Test Statistic

A test statistic is a standardized value calculated from sample data during a hypothesis test. It's compared to a critical value to decide whether to reject the null hypothesis.