Louse
Louse
Louse (pronunciation: /laʊs/) is a term used to refer to any member of the order Phthiraptera, which comprises nearly 5,000 species of wingless insect. Lice are obligate parasites, living externally on warm-blooded hosts which include every species of bird and mammal, except for monotremes, pangolins, and bats.
Etymology
The word "louse" is derived from the Old English "lūs", which is in turn derived from the Proto-Germanic "*lūs". The plural form of "louse" is "lice", following the same pattern as "mouse" and "mice".
Types of Lice
There are three types of lice that infest humans:
- Head lice (Pediculus humanus capitis)
- Body lice (Pediculus humanus corporis)
- Pubic lice (Pthirus pubis)
Each type of louse is adapted to a specific type of hair or fur.
Life Cycle
The life cycle of a louse begins with the laying of eggs, or nits. These nits are glued to the hair shafts of the host and hatch after about a week. The newly hatched lice, or nymphs, then undergo three molts before reaching the adult stage.
Treatment
Treatment for lice infestations (also known as Pediculosis) typically involves the use of over-the-counter or prescription shampoos and lotions that kill lice and their eggs. In some cases, manual removal of nits may be necessary.
Related Terms
- Pediculicide: A substance used to kill lice.
- Pediculosis: The condition of being infested with lice.
- Nits: The eggs of lice.
- Nymphs: The immature form of lice.
External links
- Medical encyclopedia article on Louse
- Wikipedia's article - Louse
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