Description: Treatment failures after the use of pediculicides, e.g. by insecticide-resistant head lice populations, led us to the development of a non-toxic, insecticide-free and ecologically benign alternative, based on a physical principle. This new treatment approach is known as cold atmospheric plasma (CAP). CAP is used e.g. in the newly developed field of plasma medicine such as treatment of diabetic wounds or within oncology. A comb-like device build upon the principles of a dielectric barrier discharge was developed. We investigated the efficacy of the plasma comb against lice and eggs of Pediculus humanus humanus on human hair strands in controlled laboratory conditions. Adults, juvenile lice and eggs of the rabbit-adapted laboratory strain of the German Environment Agency on human natural hair strands were combed with the plasma comb at ˙1 s/cm for one transition only. The treated lice were observed up to 48 h, eggs until 15 days after egg deposition. Furthermore, the mortality of adult lice was examined under ideal conditions by exposing single lice directly to the plasma resulting in a mortality of 100% after 24 h. Immediately after the treatment some lice showed an abnormal movement behaviour. Within the first hour a blood penetration from the gut in the haemocoel was visible in some lice, already. Many dead lice showed signs of body deformation. The presumed modes of action of the plasma comb are the combination of fast electric fields combined with reactive species, both generated within the discharge volume leading apparently to membrane damages inside the lice. Quelle: http://www.uibcongres.org/
Types:
Origin: /Bund/UBA/openUMWELT
Tags: Luftdruck ? Flurschaden ? Arzneimittel ? Laus ? Demografischer Wandel ? Haar ? Onkologie ? Erwachsener ? Kopflaus ? Blut ? Ei ? Mortalität ? Strand ? Deposition ? Walstrandung ?
License: unbekannt
Language: Englisch/English
Issued: 2017-01-01
Time ranges: 2017-01-01 - 2017-01-01
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