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Zorluk: OrtaPediatric Infectious Diseases

A 15-year-old adolescent female presents to the clinic complaining of a severe, lingering cough. Her illness began three weeks ago with nasal congestion, low-grade fever, and malaise. These initial symptoms subsided after a week, but she subsequently developed a spasmodic cough. She reports discrete episodes of rapid, forceful coughing that sometimes conclude with a deep, high-pitched inspiratory sound and subsequent emesis. She recently immigrated and has an unknown immunization history. Vital signs include a temperature of 36.9°C (98.4°F), heart rate of 88/min, and respiratory rate of 16/min. Lung auscultation is clear bilaterally. A complete blood count reveals a leukocyte count of 28,000/mm³ with 78% lymphocytes. Which of the following is the single best next step in management?

  1. Prescription of oral azithromycinCevap
  2. B
    Administration of aerosolized albuterol
  3. C
    Prescription of oral amoxicillin
  4. D
    Administration of the live-attenuated intranasal influenza vaccine
  5. E
    Hospital admission and intravenous ceftriaxone

Cevap

Prescription of oral azithromycin
This patient's unimmunized status, prominent paroxysmal coughing episodes with a characteristic inspiratory 'whoop', post-tussive emesis, and striking lymphocyte-predominant leukocytosis are highly characteristic of a Bordetella pertussis infection (whooping cough). Because her paroxysmal cough has been present for less than 21 days, she remains highly contagious. The single best next step is targeted antimicrobial therapy with a macrolide (e.g., azithromycin or clarithromycin). While antibiotics may not significantly alter the clinical severity once the paroxysmal stage is established, they are universally indicated to eradicate nasopharyngeal carriage and prevent the transmission of the bacteria to susceptible individuals, particularly infants.

Adım Adım Çözüm

1
Identify the clinical syndrome from the patient's history and labs.
The combination of an inspiratory whoop, post-tussive emesis, unimmunized status, and severe lymphocyte-predominant leukocytosis is pathognomonic for a Bordetella pertussis infection.
Recognizing this classic triad establishes the diagnosis of whooping cough without needing immediate confirmatory testing to start management.
2
Determine the disease stage and timeline of infectivity.
The patient's cough has been present for two weeks (following a one-week catarrhal phase).
Pertussis patients are highly contagious during the catarrhal stage and the first 21 days of the paroxysmal cough stage.
3
Select the appropriate therapeutic intervention.
Initiation of a macrolide antibiotic (such as azithromycin).
Although antibiotics may not significantly reduce the duration of symptoms once the paroxysmal stage has begun, they are strictly indicated to eradicate nasopharyngeal carriage and halt transmission to vulnerable contacts.

Anahtar Kavram

Recognition and appropriate antimicrobial management of Bordetella pertussis infection to prevent transmission.
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Pediatric Infectious Diseases

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