A 4-year-old boy with 3 days of fever, cough, runny nose, and no chest congestion or SOB is most likely diagnosed with:

A 4-year-old boy with 3 days of fever, cough, runny nose, and no chest congestion or SOB is most likely diagnosed with:

• A. Upper respiratory tract infection
• B. Pneumonia
• C. Bronchiolitis
• D. Asthma exacerbation

Answer: (A)

A simple viral upper respiratory infection is most likely. When a preschooler has fever, cough, and nasal symptoms like runny nose but shows no signs of lower airway involvement (no chest congestion, no shortness of breath, and no abnormal lung sounds or retractions), the pattern fits a common cold or other URI caused by viruses. Pneumonia would typically involve lower respiratory tract findings such as rapid breathing (tachypnea), chest retractions, grunting, focal crackles or decreased breath sounds on exam, and often a more systemic illness. Bronchiolitis usually occurs in younger children (often under 2) and presents with tachypnea, wheezing or crackles, and signs of respiratory distress. An asthma exacerbation would present with wheezing, coughing, and noticeable shortness of breath or chest tightness, often in children with a history of atopy or prior asthma. So the combination of fever plus cough and runny nose without respiratory distress or focal chest findings points most strongly to an upper respiratory viral infection.

A simple viral upper respiratory infection is most likely. When a preschooler has fever, cough, and nasal symptoms like runny nose but shows no signs of lower airway involvement (no chest congestion, no shortness of breath, and no abnormal lung sounds or retractions), the pattern fits a common cold or other URI caused by viruses.

Pneumonia would typically involve lower respiratory tract findings such as rapid breathing (tachypnea), chest retractions, grunting, focal crackles or decreased breath sounds on exam, and often a more systemic illness. Bronchiolitis usually occurs in younger children (often under 2) and presents with tachypnea, wheezing or crackles, and signs of respiratory distress. An asthma exacerbation would present with wheezing, coughing, and noticeable shortness of breath or chest tightness, often in children with a history of atopy or prior asthma.

So the combination of fever plus cough and runny nose without respiratory distress or focal chest findings points most strongly to an upper respiratory viral infection.