Procedure:
A total of 1335 students from the selected primary schools were examined for the presence of head lice using the checklist. Screening of each student was done by visual examination of the head in sufficient day light, wearing coat and gloves, then combing of the hair with fine-toothed comb on a piece of white paper for about 1-3minutes. The hair and scalp were examined by separation of the hair every 1 to 2 cm and eggs, nymph and adult lice were identified using a magnifying glass; cleanliness and length of hair were also assessed. The student was considered as positive of head lice infection if there was any evidence of head lice, such as detected head lice or nymphs, and live or dead eggs. The procedure was accomplished by the researchers with assistance of six trained internship nursing students. After finishing data collection, a brochure containing general information about head lice was given to every student, school teachers and the nurse.