Table 2.

 Common causes of occupational rhinitis

Agents	High MW	Low MW	Industry
Animal proteins	Mouse, rat, guinea pig, crabs, etc. urinary and epithelial proteins		Laboratory research, animal breeding [207, 208, 209], crab processing industry [210]
Vegetable proteins	Wheat and other cereal flours and grains, latex [51]		Baking [211], milling, food processing, hospital workers
Enzymes	Protease, amylase, cellulase, lipase		Food processing, detergent manufacture, pharmaceuticals
Pharmaceuticals	Antibiotics, morphine, cimetidine		Pharmaceutical manufacture and dispensing
Chemicals		Diisocyanates, colophony fumes, (trimellitic) acid anhydrides (TMA) [212], cyanoacrylates, epoxy resins, alkyd/polyunsatu‐rated polyester resins [213]	Spray painting, electronic soldering, plastics and paint manufacture, vinyl flooring, resin production