Abstract
Two colonies of bacteria, Pseudomonas aeruginosa and Alcaligenes viscolactis var. were isolated from water containing laboratory animal food, after incubation for a week at 28℃. Reduction of the effects of parathion, methylparathion, fenthion, DDT, diazinon, fenitrothion and lindane on mosquito larvae by these colonies was tested. Fenitrothion, parathion and methyl parathion were converted to non-toxic materials such as amino-fenitrothion, amino-parathion and amino-methylparathion within 1 to 2 days in living bacterial cells of the two colonies. The effects of fenthion, DDT, diazinon and lindane lasted 16 days under these conditions even though some reductions or conversions of the toxicants were apparent.
