Children infected with Mycoplasma pneumoniae may develop tracheitis and bronchitis, pharyngitis, and only 10% of patients may develop pneumonia. Mycoplasma infections are slow to start clinically, with fever mostly around moderate fever of 38°C. Occasionally, high fever and cough may be seen, with dry cough as the main clinical manifestation. The cough is paroxysmal, dry and violent, and is also accompanied by mucus sputum. On auscultation, a small amount of dry and wet rales can be heard in the chest, or even no dry and wet rales, and chest radiographs can show fan-shaped shadows in the hilum and lung fields. Mycoplasma infections can last 1-3 weeks with fever and longer coughs lasting up to 4-6 weeks. Mycoplasma pneumoniae infections are effectively treated with macrolides such as azithromycin or roxithromycin.