"Chronic Bronchitis"^^ . "condition characterized by persistent coughing, increased secretion from the bronchial mucosa, obstruction of the respiratory passages, scanty or profuse expectoration, and necrosis and fibrosis of the respiratory tract.CSP2003" . "Chronic Bronchitis"^^ . "Disease or Syndrome"^^ . . "Chronic_Bronchitis"^^ . "Chronic BronchitisPTNCI" . "A subcategory of CHRONIC OBSTRUCTIVE PULMONARY DISEASE. The disease is characterized by hypersecretion of mucus accompanied by a chronic (more than 3 months in 2 consecutive years) productive cough. Infectious agents are a major cause of chronic bronchitis.MSH2003_2003_05_12" . . . "C26722"^^ . "C0008677"^^ . .