1. Introduction History of pediculosis infection dated back to prehistoric time. The oldest nit louse fossil discovered is about 10 000 years old[1]. Lice are found in all countries in the world and in different climatic conditions. During the past three decades, the world has witnessed an increase in the prevalence of lice infestation. Such condition has made the health authorities as well as the health
professionals consider its diagnosis and treatment as an important matter. Three types of lice including body and head lice and crab louse are the most common human ectoparasite. Lice are blood sucking insects and belong to the Anoplura order within the Pediculidae family. In recent decades, numerous cases of head louse infestation have been reported throughout the world yearly. Head louse prevalence in school-age children is more common