epidemiology of head lice infestation in primary schoolpupils, in khajeh city, east azerbaijan province, iran

background: pediculus capitis (anoplura: pediculidae) or head louse is an obligate ectoparasite transmitted mainly through physical contact. this study was conducted to survey the prevalence of head lice infestation rate and some risk factors in primary school pupils, in khajeh city east azerbaijan province, iran. methods: we selected 20 primary schools of khajeh city during 2008 and 2009. totally 500 pupils including 200 boys and 300 girls from all grade 1-5 were selected by multistage, systematic random sampling in rural areas of khajeh city and were examined for lice. in addition, a standard questionnaire recorded information about demographic features of each pupil. results were analyzed by spss software. results: the total prevalence of head lice infestation in this study was 4.8%. and the prevalence rate was significantly higher in girls (6.66%) than in boys (2%). epidemiological factors such as: sex, school grade, family size, parent's education, type of house, hair washing (per week), number of using comb per day, were evaluated and results showed significant difference in head lice infestation and sex, school grade ,family size ,father education ,and type of house ( p < 0.05). conclusion: pediculosis is a public health problem in many parts of the world, and due to the higher prevalence of pediculosis in crowded families, family by lower levels of father's education and socioeconomic status in our study and rural area, it is necessary to give health education for families to prevent of pediculosis in this area.