Reading through your post, taking from it what I can--not trained in science but occasionally venture into the field. Recognized Lindane as a treatment commonly prescribedto children for lice in the US! It's a little bit like the farmer with a problem: short-term solution for a long-term, big headache ("Endosulfan was detected in dust form blown over to the Caribbean from Sahara Desert after the dust cross over the Atlantic"!). Thanks for a clear analysis of commonly used pesticides.