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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 ...
The treatment of human lice is the removal of head lice parasites from human hair. It has been debated and studied for centuries. It has been debated and studied for centuries. However, the number of cases of human louse infestations (or pediculosis ) has increased worldwide since the mid-1960s, reaching hundreds of millions annually. [ 1 ]
Accordingly, the infestation with head lice is named pediculosis capitis, while this with body lice, pediculosis corporis. [ 1 ] [ 2 ] Although pediculosis in humans may properly refer to lice infestation of any part of the body, the term is sometimes used loosely to refer to pediculosis capitis , the infestation of the human head with the ...
To kill newly hatched lice, both treatments can be repeated within the following seven to ten days. [ 5 ] [ 19 ] European guidelines state alternatives to permethrin as including either the application of 0.2% phenothrin (washed off after two hours), or 0.5% malathion lotions (washed off after 12 hours). [ 2 ]
[12] [13] Head lice hatch typically six to nine days after oviposition. [11] [14] After hatching, the louse nymph leaves behind its egg shell, still attached to the hair shaft. The empty egg shell remains in place until physically removed by abrasion or the host, or until it slowly disintegrates, which may take six or more months.
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Relapsing fever is a vector-borne disease caused by infection with certain bacteria in the genus Borrelia, [1] which is transmitted through the bites of lice, soft-bodied ticks (genus Ornithodoros), or hard-bodied ticks (Genus Ixodes). [2] [3]
Body lice are disease vectors and can transmit pathogens that cause human diseases such as epidemic typhus, trench fever, and relapsing fever. [6] In developed countries, infestations are only a problem in areas of poverty where there is poor body hygiene, crowded living conditions, and a lack of access to clean clothing. [ 7 ]