棉尘沉着病本病免疫学机制尚不完全清楚。发生于接触棉花、大麻或亚麻尘埃的工人,其特点为休息后重返工作数小时内发生胸闷、喘息和咳嗽,肺通气量减少。以后几天症状可能持续下去,并发展成严重的呼吸困难、慢性咳嗽和呼吸功能不全。接触大麻的工人有二种反应类型,一种仅有呼吸道阻力增加,但是无体征, Cotton dust disease The immunological mechanism of the disease is not fully understood. Workers who come into contact with cotton, hemp or linen dust are characterized by chest tightness, wheezing and coughing within hours of returning to work after a break, and reduced lung ventilation. The symptoms may persist in the next few days and develop into severe dyspnea, chronic cough and respiratory insufficiency. There are two types of response for workers exposed to cannabis, one with only increased respiratory resistance, but no signs,