Patients with audible dry rales and croup in the lungs require the following tests: Adolescents often have symptoms of pharyngitis, laryngitis, sinusitis, otitis media, and bronchitis such as hoarseness, dry cough, sometimes fever, and sore throat, and can persist for several weeks. The occurrence of pneumonia is usually mild and closely resembles the clinical presentation of Chlamydia pneumoniae infection and may be accompanied by extrapulmonary manifestations such as erythema nodosum, thyroiditis, encephalitis, and Green-Barre syndrome. Pneumonia is more severe in adults, and hospitalization and respiratory support are often necessary, especially in the elderly. Some authors have found an association between Chlamydia pneumoniae infection and coronary artery disease by serologic investigation, but this needs to be further established. Pulmonary and pleural auscultation: Pulmonary and pleural auscultation is one of the most basic and important methods of pulmonary examination and is important for the diagnosis of pulmonary disease. Pulmonary auscultation can be performed in the sitting or lying position. The auscultation generally starts from the tip of the lung and goes from top to bottom, from the anterior chest to the sides and back, and should be compared with the left and right. During auscultation, one should breathe calmly and, if necessary, take a deep breath or cough a few times and listen immediately to changes in breath sounds and additional sounds. Chest radiograph: A chest radiograph, also known as a chest radiograph, is performed. The X-ray image obtained from radiography is much clearer than that from fluoroscopy, and its advantages include: 1. The image of the examined area is permanently preserved on the film, which can be used for analysis, discussion and review for comparison. 2.It can be preserved as scientific research data. 3.Fluoroscopy can show the microstructure, such as 2mm or more of the early source of disease is clearer than fluoroscopy. 4.Fluoroscopy can examine thicker parts of the body and make the patient receive less X-rays.