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Head lice infestation, also known as pediculosis capitis, is the infection of the head hair and scalp by the head louse (Pediculus humanus capitis). [6] Itching from lice bites is common. [ 5 ] During a person's first infection, the itch may not develop for up to six weeks. [ 5 ]
There are three type of tinea capitis, microsporosis, trichophytosis, and favus; these are based on the causative microorganism, and the nature of the symptoms. In microsporosis , the lesion is a small red papule around a hair shaft that later becomes scaly; eventually the hairs break off 1–3 mm above the scalp.
Head louse crawling on a hairbrush Phthiriasis in the head of a 6-year-old boy caused by phthiriasis pubis as confirmed by optical (c) and electron microscopy (d). [5] Head-lice infestation is most frequent on children aged 3–10 and their families. The CDC estimates that 6 to 12 million children aged 3 to 11 get lice every year. [6]
Head lice feed on blood several times each day and tend to reside close to your scalp, which explains the itchiness and why it’s sometimes so difficult to tell that you have head lice.
Head lice are most common among young children — 6 million to 12 million lice outbreaks occur yearly in children between 3 and 11 in the US — though adults are vulnerable to head lice as well.
The discovery of head lice on a child's body no longer means they are guaranteed a day off from school, according to the Centers for Disease Control and Prevention.
A body lice infestation is treated by improving the personal hygiene of the infested person, including assuring a regular (at least weekly) change of clean clothes. Clothing, bedding, and towels used by the infested person should be laundered using hot water (at least 130 °F or 54 °C) and machine dried using the hot cycle.
Development of Pediculus humanus humanus , which is similar to that of head lice (Pediculus humanus capitis) Head lice, like other insects of the order Phthiraptera, are hemimetabolous. [1] [10] Newly hatched nymphs will moult three times before reaching the sexually mature adult stage. [1] Thus, mobile head lice populations may contain eggs ...