Comments
  Symptoms: flu-like illness with rhinitis; 
Signs: leukocytosis; normal chest x-ray; 
Onset after exposure; 1-6 hours; 
Heavy exposure to: dusts of cotton, flax, soft hemp, or kapok; 
Resolution: few hours to few days; 
Comments: A common etiology is suspected for mill fever and byssinosis: plant dusts contaminated with gram-negative endotoxins; [Rom, p. 410]