Most chest colds are viruses—yet U.S. clinics still hand out antibiotics
Acute bronchitis usually means a cough lasting about three weeks. More than ninety percent of cases are viral, so antibiotics rarely help. Still, among more than ten million American visits a year for the illness, roughly seventy percent leave with a prescription they mostly do not need.
Bronchitis is inflammation of the large and medium airways. Acute disease—often called a chest cold—typically follows a nose, throat, or sinus infection that travels downward, bringing sputum, wheeze, shortness of breath, or chest pain. Viruses such as rhinovirus, adenovirus, parainfluenza, and influenza dominate; bacteria like Mycoplasma pneumoniae or Bordetella pertussis account for only a few cases. Smoke, dust, and other irritants raise risk. About five percent of adults and six percent of children get at least one episode yearly, more often in winter months.
Chronic bronchitis means a productive cough for three months or more in each of two successive years. Smoking is the main driver; air pollution and genetics play smaller roles. Many patients also have COPD, though newer COPD definitions no longer require the bronchitis label. Excess mucus from goblet cells and enlarged glands thickens airways until coughing can no longer clear them, especially first thing in the morning when yellow or green sputum is common.
Diagnosis rests on symptoms; sputum colour does not separate virus from bacterium, and chest X-rays mainly rule out pneumonia. Care is rest, paracetamol or NSAIDs for fever; cough syrups lack strong evidence and are discouraged under age six. Antibiotics sometimes tidy exam findings yet are overused at roughly seventy percent of more than ten million U.S. visits. In the chronic form, giving up smoking can slow the decline in lung function, with medicines, pulmonary rehabilitation and occasionally oxygen as back-up. The acute illness got its modern name in 1808, when British physician Charles Badham described it in a book on inflamed bronchial membranes.
Source: Bronchitis
