Plasma cholinesterase and erythrocyte acetylcholinesterase activities have a long history of use in monitoring both workers at risk of organophosphorus pesticide (OP) exposure and in investigating accidental exposures to OPs. On account of wide inter-individual variation, the establishment of unexposed, baseline enzyme activities is necessary for accurate interpretation. This paper describes th...

Several organophosphorus (OP) insecticides can selectively kill the silkworm maggot, Exorista sorbillans (Es) (Diptera: Tachinidae), while not obviously affecting the host (Bombyx mori) larvae, but the mechanism is not yet clear. In this study, the cDNA encoding an acetylcholinesterase (AChE) from the field Es was isolated. One point mutation (Gly353Ala) was identified. The Es-353G AChE and Es-...

Dichlorvos (DDVP) causes neurotoxicity primarily by inhibiting cholinesterase (ChE) which is the characteristic feature of organophosphate pesticides. In this study, we found for the first time that DDVP shows differential inhibition of ChE (acetylcholinesterase+butyrylcholinesterase) in various rat brain regions. A single dose of DDVP (1/3 LD(50)) after 16 h of treatment elicited ChE inhibitio...

A series of tests were performed in the laboratory and field, 2014-2017, assessing efficacy Trap ‘N’ Kill (TNK) (Springstar® Inc., Woodinville, WA) lethal ovitrap on Aedes albopictus adults immatures. The TNK design is to attract kill adult female mosquitoes as well any larvae that emerge over a claimed 45-day period by utilizing active ingredient dichlorvos. Cage trials demonstrate trap effect...