Licenders’ lice shampoo works!
headlice June 23rd, 2008
The problem of treating lice in the 21st century, often boils down to chemical resistance. To understand this challenge to head lice treatment, you need to understand the physical characteristics of human head lice.
Insects, [including human hair lice], make formidable opponents because they are protected by strong exoskeletons - hardened shells that cover them like a suit of armor and have the locomotion of a tank. It is the exoskeleton that has most challenged pest control - until now. Enzyme is the key.
Because a [head lice] exoskeleton is a hard shell made of non-living material, it does not grow in size with the insect's development. Therefore it is necessary for all insects to shed their exoskeletons several times during the course of their life. They accomplish this by using enzymes they create naturally to split open their exoskeleton and thus grow larger. It is during this molting phase that an insect is at its most vulnerable - susceptible to drying out or drowning since the hard shell that normally would protect [the louse] has been cast off.
The surface of every insect's exoskeleton is covered with a waxy, water-repellant patina known as the cuticle. This outer coating protects the human head lice from harm, and has long been an obstacle for pesticide's effectiveness - the chemicals must penetrate the cuticle in order to affect the insect, so pesticides employ a variety of volatile solvents, toxic dusts or light oils in order to cut through the cuticle and thus deliver the poison into the insect interior.
Enzymes provide a safer, and more reliable method of killing head lice.
to be continued
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