Measurement of serum or plasma and brain cholinesterase (ChE) activities in wild birds is used to diagnose and monitor their exposure to organophosphate and carbamate insecticides (Marden et al., 1994; Burn & Leighton, 1996; Iko et al., 2002; Osten et al., 2005). Reduced enzyme activity is an indicator of exposure and adverse effects of anti ChE insecticides even in the absence of overt signs o...
