Mycobacteria and Nocardia | 合法醫療器材資訊網

The first sign of a new infection is often conversion of the intradermal skin test with purified protein derivative (PPD) to positive or detection of a lesion by chance on a chest x-ray in an otherwise asymptomatic individual (see Diagnosis below). Clinical signs and symptoms develop in only a small proportion (5–10 percent) of infected healthy people. These patients usually present with pulmonary disease; prominent symptoms are chronic, productive cough, low-grade fever, night sweats, easy fatigability, and weight loss. Tuberculosis may present with or also exhibit extrapulmonary manifestations including lymphadenitis; kidney, bone, or joint involvement; meningitis; or disseminated (miliary) disease. Lymphadenitis and meningitis are more common among normal infants with tuberculosis, and all extrapulmonary ...