1) Croup-but runny nose is not usual. Epiglottis-but usually toxic appearance. Bacterial tracheitis-but brassy cough, high fever, respiratory distress. Spasmotic croup-possible but usually 1-3 years of age. Acute infectious laryngitis-hoarseness and loss of voice out of proportion to systemic finding, less likely. Diphtheritic croup-extremely rare in North America. Foreign body aspiration-no fever and runny nose. Retropharyngeal abscess-drooling, difficulty swallowing. Extrinsic compression (vascular ring) or intraluminal obstruction (masses)-no fever and runny nose. Angioedema-no fever. Acute bronchitis-possible. Bronchoiolitis-but no apnea and decreased appetite. Asthma-no fever and runny nose. continued.