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The head louse (Pediculus humanus capitis) is an obligate ectoparasite of humans. [1] Head lice are wingless insects that spend their entire lives on the human scalp and feed exclusively on human blood. [1] Humans are the only known hosts of this specific parasite, while chimpanzees and bonobos host a closely related species, Pediculus schaeffi.
The common name lousewort, applied to several species, derives from an old belief that these plants, when ingested, were responsible for lice infestations in livestock. [2] [3] The genus name Pedicularis is from the Latin pediculus meaning louse. [4]
Pediculus humanus is a species of louse that infects humans. It comprises two subspecies: [1] [2] Pediculus humanus humanus Linnaeus, 1758 – body louse; Pediculus humanus capitis De Geer, 1767 – head louse
Head lice bites on the back of the neck Adult male (left) and female (right) head lice. Head lice are generally uncomfortable, but typically do not constitute a serious condition. [7] The most common symptom is itching of the head, which normally worsens 3 to 4 weeks after the initial infestation. The bite reaction is very mild, and it can be ...
Pediculus is a genus of sucking lice, the sole genus in the family Pediculidae. Pediculus species are ectoparasites of primates. Species include: [1] Pediculus clavicornis Nitzsch, 1864; Pediculus humanus Linnaeus, 1758. Pediculus humanus humanus Linnaeus, 1758 – the body louse; Pediculus humanus capitis De Geer, 1767 – the head louse ...
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Humans host two species of louse—the head louse and the body louse are subspecies of Pediculus humanus; and the pubic louse, Pthirus pubis. The body louse has the smallest genome of any known insect; it has been used as a model organism and has been the subject of much research. Lice were ubiquitous in human society until at least the Middle ...
It was expected that dating the split of the ancestral human louse into two species, the head louse and the pubic louse, would date the loss of body hair in human ancestors. However, it turned out that the human pubic louse does not descend from the ancestral human louse, but from the gorilla louse, diverging 3.3 million years ago. This ...