03-24-2007, 10:15 AM
A 5-month-old previously healthy male infant presents to the ED with cough and dyspnea for 2 days and a temperature of 38.4°C (101.1°F). There is no family history of asthma. He is tachypneic (respiratory rate, 48 breaths/min) and has bilateral expiratory wheezing and subcostal retractions. His oxygen saturation is 93% to 94%. Which of the following is the most common cause of his illness?
1. Adenovirus
2. M. pneumoniae
3. Parainfluenza virus
4. RSV
5. Staphylococcus aureus
1. Adenovirus
2. M. pneumoniae
3. Parainfluenza virus
4. RSV
5. Staphylococcus aureus