The monitoring of organochloride residues is important because they have a propensity to accumulate in the tissues of man and animals. All chlorinated hydrocarbon insecticides can be absorbed through dermal, oral, and respiratory routes. Storage is determined primarily by metabolic and excretion rates. Interactions among the compounds have complex effects on metabolism which appear to be species dependent. An exhaustive review of research findings with respect to these chemicals has been provided by Hayes (1982). Organochlorine pesticides absorbed in sufficient doses may result in severe dysfunction of the central nervous system through interference with axonic transmission of nerve impulses. Symptoms include behavioral changes, sensory and equilibrium disturbances. (Copyright (c) 1985 Springer-Verlag New York Inc.)