Cotton fiber-associated endotoxins suspected of contributing to pulmonary dysfunction in some textile mill workers can be destroyed by dry heat. Data on endotoxin destruction in cotton lint heated at 250 or 255 C for 5, 10, 15, or 20 seconds will be used to determine optimal conditions required for dry heat detoxification. Dry heat detoxification will be compared with steam treatment of lint. Fiber bundle strength and elongation at break, and color of steam-treated lint will be evaluated.