Scanning electron microscope image of airborne respirable dust sample collected in test chamber after agitating a bulk<unk>  sample from a card manufacturing plant<unk>  is caused by exposure to small pieces of<unk> , usually nylon, created during the<unk> ing process and inhaled. Exposure to rotary-cut<unk>  particulates is the main risk factor; whether or not other types of<unk>  cause this pulmonary fibrosis is not yet determined. Other types of<unk>  include rayon, polypropylene, and polyethylene.<unk> s exposed to nylon, polypropylene, polyethylene, and rayon<unk> ing debris have developed<unk> . Exposure to higher concentrations of respirable<unk>  particles is associated with more severe disease. Whether or not smoking affects the progression or incidence of<unk>  is a topic of ongoing research as of 2015. Research in rats has shown that nylon<unk> ing is a causative agent.
Flock worker's lung
World Trade Center lung
BoRit Asbestos
Respiratory droplet
Floater
Tuberculosis hut
Dental aerosol
Farmer's lung