[Determination of the sensitivity of head lice to insecticides]

The author recommends a method of determination of sensitivity of head lice which, in difference from the accepted one, is based on the establishment of the time interval between the death of 50-100% of the insects as a result of the contact with the insecticide in definite doses of the active substance. The method permits to assess the rapidity and the extent of the toxic action of various substances on lice; it is simple and convenient for use in practice.