Wicker G W, Williams W A, Bradley J R, Guthrie F E
Arch Environ Contam Toxicol. 1979;8(4):433-40. doi: 10.1007/BF01056349.
The red blood cell and plasma cholinesterase (ChE) levels of cotton scouts inspecting foliage for insect infestation and damage were monitored. Group means for ChE activity were significantly depressed at one or more time(s) during four of the eight growing seasons studied. Although no symptoms of organophosphate poisoning were confirmed, several scouts exhibited ChE depressions over 50% of pre-exposure levels.
对检查叶片是否有虫害和损伤的棉花巡查员的红细胞和血浆胆碱酯酶（ChE）水平进行了监测。在所研究的八个生长季节中的四个季节里，ChE活性的组均值在一个或多个时间点显著降低。尽管没有确诊有机磷中毒的症状，但有几名巡查员的ChE水平下降超过了暴露前水平的50%。
