Headlice remain close to the scalp and move quickly when disturbed. Eggs are tiny specks that are firmly glued to the hair close to the scalp. Eggs that are more than 12 mm from the base of the scalp are dead or are only empty egg casings that are pearly white and resemble dandruff. Clinical Features Itching occurs, generally behind the ears and at the back of the neck. Public Health Significance and Occurrence Headlice infestation is more of a social problem than a public health problem as head lice do not transmit any disease.
Outbreaks are common among children in schools and child care facilities.
Lice may infest people of any socio-economic position, age or sex. Method of Diagnosis Lice may be seen on the scalp if the hair is rapidly parted. Discarded skins and black sandy excrement are seen on pillows and collars. Itching of the scalp causing the person to scratch may prompt examination. Reservoir Humans, usually affecting most family members.