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Difficulty: MediumPediatric Infectious Diseases

A 2-year-old boy is brought to the pediatric clinic due to a 2-day history of fever, cough, and rapid breathing. He has had no previous significant medical illnesses and his immunizations are up to date. His temperature is 39.2°C (102.6°F), heart rate is 142/min, blood pressure is 90/55 mmHg, and respiratory rate is 46/min. Pulse oximetry is 96% on room air. On examination, the patient appears tired but is consolable and readily drinks oral rehydration solution. Chest auscultation reveals focal fine crackles and decreased breath sounds over the left lower lung base. There are no intercostal retractions, nasal flaring, or wheezing. The remainder of the examination is unremarkable. Which of the following is the most appropriate next step in management?

  1. Oral high-dose amoxicillinAnswer
  2. B
    Oral azithromycin
  3. C
    Oral amoxicillin-clavulanate
  4. D
    Intravenous ceftriaxone
  5. E
    Nebulized albuterol

Answer

Oral high-dose amoxicillin
The patient's clinical presentation of high fever, tachypnea, and focal lung crackles strongly suggests community-acquired pneumonia (CAP). In a fully immunized preschool-aged child (such as this 2-year-old), Streptococcus pneumoniae is the most common bacterial cause. Because the patient is well-appearing, has normal oxygen saturation, lacks signs of severe respiratory distress (such as retractions or grunting), and is able to tolerate oral intake, outpatient management is indicated. The first-line empiric therapy for uncomplicated outpatient bacterial CAP in this age group is high-dose oral amoxicillin, which provides excellent, targeted coverage for S. pneumoniae.

Step-by-Step Solution

1
Evaluate the patient's symptoms, vital signs, and physical examination findings.
The patient has a high fever, tachypnea, and focal crackles in the left lower lung base without signs of severe respiratory distress or hypoxia.
To establish a primary clinical diagnosis and assess the severity of the illness.
2
Determine the appropriate setting for treatment based on illness severity.
Outpatient management is appropriate because the patient is well-appearing, maintains oxygenation above 90% on room air, lacks severe work of breathing, and tolerates oral fluids.
To decide whether the patient requires hospital admission and intravenous therapy versus safe discharge home.
3
Select the most appropriate empiric antimicrobial therapy for an outpatient preschool-aged child with typical community-acquired pneumonia.
Oral high-dose amoxicillin is selected to target Streptococcus pneumoniae, the most common bacterial pathogen causing typical pneumonia in this age group.
To provide targeted, narrow-spectrum coverage in accordance with antibiotic stewardship guidelines.

Key Concept

First-line outpatient treatment for uncomplicated community-acquired pneumonia (CAP) in preschool-aged children is high-dose amoxicillin.
Estimated Time:1m 15s
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Topics

Pediatric Infectious Diseases

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