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The Effect of Organophosphorus Compounds on Serum Pseudocholinesterase Levels in a Group of Industrial Workers

This paper presents the findings of a study of serum pseudocholinesterase activity in a group of 36 industrial workers chronically exposed to organophosphorus (OP) compounds. The mean pseudocholinesterase level of the workers was significantly lower than that of 36 other workers without a history of similar exposure. Although there was a high incidence of clinical features suggestive of OP compound toxicity in the exposed workers, no significant correlation between serum pseudocholinesterase levels and clinical symptoms and signs was found. Six exposed workers, found to have low serum pseudocholinesterase levels, were transferred for 6 months to work areas which did not involve OP exposure, whereupon their levels rose significantly back to the normal range.