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Difficulty: EasyPediatric Infectious Diseases

A 16-month-old male toddler presents to the outpatient clinic with a 3-day history of fever, irritability, and left ear tugging. According to his mother, the child developed a low-grade fever and clear rhinorrhea approximately one week ago. Current vital signs include a temperature of 38.7°C (101.7°F), a heart rate of 124/min, and a respiratory rate of 26/min. Otoscopic evaluation of the left ear reveals a distinctly bulging, erythematous tympanic membrane that lacks mobility upon pneumatic testing. The right tympanic membrane is translucent with a normal light reflex. The patient's medical history is unremarkable, and he has received no antibiotics in the past year. He has no known drug allergies. Which of the following is the most appropriate initial pharmacotherapy for this patient?

  1. A
    Oral cefdinir
  2. B
    Oral azithromycin
  3. Oral amoxicillinAnswer
  4. D
    Oral amoxicillin-clavulanate
  5. E
    Intramuscular ceftriaxone

Answer

Oral amoxicillin
Oral amoxicillin is the empiric antibiotic of choice for acute otitis media (AOM) in children who do not have a penicillin allergy and have not received amoxicillin in the previous 30 days. It effectively targets Streptococcus pneumoniae, the most common bacterial pathogen responsible for AOM, while maintaining a narrow spectrum that minimizes the development of antimicrobial resistance.

Step-by-Step Solution

1
Diagnose the condition based on the clinical presentation.
The patient has a fever, ear pain, and a bulging, immobile tympanic membrane, which confirms the diagnosis of acute otitis media (AOM).
AOM requires both signs of acute inflammation (fever, erythema) and middle ear effusion (bulging, decreased mobility).
2
Select the appropriate empiric treatment following antibiotic stewardship principles.
Oral amoxicillin is selected as the initial therapy.
Amoxicillin provides excellent coverage for Streptococcus pneumoniae (the most common bacterial cause) while maintaining a narrow spectrum to prevent unnecessary antibiotic resistance.

Key Concept

High-dose oral amoxicillin is the standard first-line antibiotic for uncomplicated acute otitis media in pediatric patients without a history of recent amoxicillin use, concurrent purulent conjunctivitis, or penicillin allergies.
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Pediatric Infectious Diseases

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