Cough is quite troublesome and persistent. Chest x-ray typically shows lower lobe infiltrate. Cold agglutinins are not positive until the second week of illness. Specific serology is available. Cough may be prolonged.
Serology is available.
Erythromycin vs. clarithromycin. Environmental tobacco smoke. Usually follows a typical URI with cough. Quality is loud, barking or honking. For example, the patient can carry on a conversation, coughing only between statements.