@article { , title = {Lethality of essential oil constituents towards the human louse, Pediculus humanus, and its eggs}, journal = {Fitoterapia}, volume = {77}, year = {2006}, note = {Journal}, month = {June, 2006}, pages = {303-309}, abstract = {Essential oils have been widely used in traditional medicine for the eradication of lice, including head lice, but due to the variability of their constitution the effects may not be reproducible. In an attempt to assess the contribution of their component monoterpenoids, a range of common individual compounds were tested in in vitro toxicity model against both human lice (Pediculus humanus, an accepted model of head lice lethality) and their eggs, at different concentrations. No detailed study into the relative potencies of their constituent terpenoids has so far been published. Adult lice were observed for lack of response to stimuli over 3 h and the LT50 calculated, and the percentage of eggs failing to hatch was used to generate ovicidal activity data. A ranking was compiled for adult lice and partially for eggs, enabling structure}, keywords = {Monoterpenes; Head lice ; Pediculosis ; Essential oils ; Pediculicidal ; Ovicidal ; control }, author = {Priestley, C. M. and Burgess, Ian F. and Williamson, E. M.} }