[Hygienic evaluation of the combined effects of ammonia and low temperatures on chemical industry workers].

Workers servicing the equipment at chemical plants' open sites and exposed to short-duration combined effect of ammonia and low temperature had higher rates of temporary disability in connection with diseases of the respiratory, skin and subcutaneous, cardiovascular and osteomuscular systems. They were evidently caused by regulatory mechanism's strain, decrease of nonspecific immunologic resistance and olfactory sensitivity, bronchospasmic effects.