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Difficulty: EasyPediatric Infectious Diseases

An infant, aged 21 days, is evaluated at an urgent care clinic for a one-day history of noisy breathing, frequent cough, and nasal congestion. The mother notes the infant's 4-year-old sister recently stayed home from preschool with a cold. The infant was born at 39 weeks gestation via uncomplicated vaginal delivery. Vital signs show a temperature of 37.2°C (99.0°F), heart rate of 155/min, respiratory rate of 62/min, and oxygen saturation of 95% on room air. Physical examination reveals mild subcostal retractions, copious clear nasal discharge, and diffuse bilateral wheezes and crackles on auscultation. Skin examination shows scattered, well-demarcated erythematous macules with small central yellow pustules predominantly on the chest and back. Which of the following is the most appropriate next step in management?

  1. Perform nasal suctioning and provide supportive hydrationAnswer
  2. B
    Administer nebulized albuterol and oral dexamethasone
  3. C
    Admit to the hospital and initiate intravenous ampicillin and cefotaxime
  4. D
    Initiate intravenous acyclovir and obtain viral swabs of the skin lesions
  5. E
    Administer the live-attenuated measles, mumps, and rubella vaccine

Answer

The most appropriate next step is to perform nasal suctioning and provide supportive hydration.
The correct answer emphasizes supportive care. This infant presents with a classic clinical picture of acute viral bronchiolitis (rhinorrhea followed by tachypnea, wheezing, and crackles) and a concurrent incidental benign rash known as erythema toxicum neonatorum (ETN). Because the infant is maintaining oxygenation (95% on room air), the standard of care is strictly supportive, focusing on clearing the nasal passages with suctioning to assist with breathing and feeding.

Step-by-Step Solution

1
Diagnose the respiratory condition based on clinical presentation.
The infant has upper respiratory symptoms that progressed to lower respiratory tract signs (tachypnea, wheezing, crackles, retractions), which is the classic presentation of acute viral bronchiolitis (most commonly caused by RSV).
Recognizing bronchiolitis is essential to avoid inappropriate pharmacological interventions like bronchodilators or antibiotics.
2
Evaluate the infant's skin findings.
The scattered erythematous macules with central yellow pustules in an otherwise healthy-appearing afebrile newborn define Erythema Toxicum Neonatorum (ETN).
Differentiating a benign rash from a severe infectious rash (like HSV) prevents unnecessary hospitalization and invasive workups.
3
Determine the appropriate management plan.
Select supportive care (nasal suctioning to clear the airway and maintaining hydration), as the infant's oxygen saturation is adequate (>90%) and he does not show signs of imminent respiratory failure.
Supportive care is the cornerstone of bronchiolitis management, and ETN requires no treatment.

Key Concept

Diagnosis and supportive management of acute viral bronchiolitis and recognition of benign neonatal rashes.
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Topics

Pediatric Infectious Diseases

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