All are seen in chronic bronchitis except:
**Core Concept**
Chronic bronchitis is a type of chronic obstructive pulmonary disease (COPD) characterized by persistent inflammation and irritation of the bronchial tubes, leading to increased mucus production and cough. The pathophysiology involves exposure to irritants such as cigarette smoke, which causes an inflammatory response and leads to airway remodeling.
**Why the Correct Answer is Right**
The correct answer is related to the pathophysiology of chronic bronchitis. Chronic bronchitis is typically characterized by the presence of chronic cough and sputum production, which is not seen in asthma. The inflammation in chronic bronchitis is primarily due to the exposure to irritants, which causes an increase in the production of mucus and a decrease in the function of the cilia in the bronchial tubes.
**Why Each Wrong Option is Incorrect**
* **Option A:** This is incorrect because chronic bronchitis is indeed characterized by a chronic cough, which is a hallmark symptom of the disease.
* **Option B:** This is incorrect because chronic bronchitis is often associated with airflow limitation, which is a key feature of COPD.
* **Option C:** This is incorrect because chronic bronchitis is typically seen in smokers or those exposed to secondhand smoke, which is a major risk factor for the disease.
**Clinical Pearl / High-Yield Fact**
It's essential to note that chronic bronchitis is often distinguished from asthma by the presence of chronic cough and sputum production, which is a key clinical feature that helps in differentiating between the two conditions.
**Correct Answer: D.**