The content of methemoglobin in the above-mentioned animals with acute poisoning by chlordimeform was within the normal range,whereas those pigeons acutely poisoned by sodium nitrite had a remarkable increase.

• 上述杀虫脒急性中毒动物的血样中高铁血红蛋白的含量均属正常范围，而亚硝酸钠急性中毒家鸽血样中高铁血红蛋白的含量明显增加，二巯基丙磺酸钠不能还原由亚硝酸钠所致的高铁血红蛋白。