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A 64-year-old farmer developed aplastic anaemia after exposure to 2-methyl-4-chlorphenoxyactic acid while spraying weed killer. Muscular weakness, haemorrhagic gastritis and slight signs of liver damage occurred at the same time. All these symptoms, including blood dyscrasia , are consistent with those described as toxic effects of chlorphenoxyacetic acids in animal experiments. A causal relationship between aplastic anaemia and the 2-methyl-4-chlorphenoxyacetic acid thus seems probable. The anaemia was reversible, but the case serves as a warning that careful safety measures are required during the use of chlorphenoxyacetic acids and related compounds.
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