Toxicological and Entomological Field Evaluation1 of the Effects of Mobam®23 Powder Against Body Lice (Anoplura: Pediculidae)

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Abstract
Human volunteers were exposed, under medical surveillance, to 34 g of a 5% formulation consisting of 5% Mobam® (4-benzothienyl-N-methylcarbamate) in pyrax powder (w/w) to evaluate the formulation's potential value as a louse toxicant. The test was conducted at the Republic of Korea's Army Disciplinary Center, at Kwang Ju, near Seoul, Korea from January to March 1969. The test participants were divided into 3 groups of 100 men each and dusted once in the following manner: the control group was dusted with an average of 17 g pyrax powder; the test group was treated with an average of 34 g of the test formulation; and a third positive control group was dusted with an average of 20 g of 1% malathion in inert powder. Applications of Mobam® dust using a power-dusting apparatus gave 4 weeks of nearly 100% protection, with apparently no greater degree of hazard than 1% malathion, which provided about 94% control. Lice removed from prisoners' clothing were not resistant in laboratory tests to low concentrations of Mobam® or malathion. Other lice from the same source were shown to be slightly resistant to lindane.

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