Animals 4 Azinphosmethyl 4 Biomphalaria 4 Carboxylesterases 4 Cholinesterases 4 Gastropoda 4 Water Pollutants, Chemical 4 acetylthiocholine 4 animal tissue 4 article 4 azinphos methyl 4 biomarker 4 butyrylthiocholine 4 carbamate (ester) 4 carboxylesterase 4 choline derivative 4 cholinesterase 4 controlled study 4 environmental exposure 4 enzyme activity 4 enzyme inhibition 4 enzyme kinetics 4 insecticide 4 nonhuman 4 pollution exposure 4 propionylthiocholine 4 protein hydrolysis 4 unclassified drug 4 1 naphthyl acetate 2 1,5 bis(4 allyldimethylammoniumphenyl)pentan 3 one dibromide 2