01425nas a2200157   4500008004100000245009100041210006900132260000900201300001400210490000800224520089000232100003301122700002901155700002701184856005601211       2006                        eng d00aEmbryonic development of human lice: rearing conditions and susceptibility to spinosad0 aEmbryonic development of human lice rearing conditions and susce  c2006  a257 - 2610 v1013 aThe embryonic development of human lice was evaluated according to the changes in the morphology of the embryo observed through the transparent chorion. Based on ocular and appendage development, three stages of embryogenesis were established: early, medium, and late. Influence of temperature and relative humidity (RH) on the laboratory rearing of Pediculus humanus capitis eggs was assessed. The optimal ranges for temperature and RH were 27-31°C and 45-75%. The susceptibility of human louse eggs to insecticide spinosad (a macrocyclic lactone) was assessed by immersion method. The results showed similar susceptibility to spinosad in early, medium, and late stages of head lice eggs. In addition, this study showed similar susceptibility of head and body lice eggs to spinosad, an insecticide that has not been used as pediculicide in Argentina (lethal concentration 50: 0.01%).1 aMougabure-Cueto, Gastón, A.1 aZerba, Eduardo, Nicolás1 aPicollo, María, Inés  uhttp://www.phthiraptera.info/Publications/46544.pdf