“…In two earthworm species, Eisenia fetida and Lumbricus terrestris, multiple esterases, including acetylcholinesterase (AChE), butyrylcholinesterase, and carboxylesterase (CE), have been assessed as biomarkers for malathion exposure (HensonRamsey et al, 2011). Several studies have also reported AChE, catalase (CAT), and glutathione-S-transferase (GST) as biochemical biomarkers in Eisenia Andrei for the insecticides, endosulfan, temephos, malathion, and pirimiphos-methyl (Stepić et al, 2013), and AChE, CAT, CE, and the efflux pump as biomarkers in E. andrei and Octolasion lacteum for dimethoate exposure (Velki and Hackenberger, 2012). However, these studies have demonstrated that environmental biomarkers are not specific to the individual burden experienced by the organism, resulting in misleading data interpretation.…”