In cotton industry, workers most commonly involved by pneumoconiosis are: September 2004
**Core Concept**
Pneumoconiosis refers to a group of lung diseases resulting from the inhalation of dust particles, leading to inflammation and fibrosis in the lung tissue. In the cotton industry, workers are exposed to cotton dust, which can cause a specific type of pneumoconiosis known as byssinosis.
**Why the Correct Answer is Right**
Byssinosis, also known as brown lung disease, is a respiratory condition caused by the inhalation of cotton dust. The condition is characterized by symptoms such as chest tightness, cough, and shortness of breath, particularly during periods of increased exposure to cotton dust. The pathophysiology of byssinosis involves the activation of inflammatory cells, such as macrophages and lymphocytes, which release cytokines and other mediators leading to airway constriction and inflammation.
**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect because it is not a pneumoconiosis caused by cotton dust.
* **Option B:** This option is incorrect because it is a pneumoconiosis caused by asbestos fibers, not cotton dust.
* **Option C:** This option is incorrect because it is a pneumoconiosis caused by silica dust, not cotton dust.
**Clinical Pearl / High-Yield Fact**
Cotton dust exposure can be prevented by implementing engineering controls, such as improved ventilation systems, and administrative controls, such as rotating workers out of dusty areas. Workers should also wear personal protective equipment, including respirators, to minimize exposure.
**Correct Answer:** A. Cotton workers.