Many lice were found in the towel used to dry the hair of the infected subjects. The result of the study shows that lice were removed on the infected subjects. Therefore, the researchers concluded that atis leaves extract is useful and can be used as a lice remover to threat those who are infected. Aside from the fact, it is cheaper compared to commercial products (Montoya, 2018). According to Heong 2017, the insects should be homogenous, exclude all variations such as age, sex, condition. Some insects such as beetle can be reared without difficulty in large numbers; others such as human lice may be troublesome to
produce in quantity. With precise experimental conditions and insects difficult to rear batches as small as 5 to 10 may be used. In allocating, it is best to apportion them in such a way that the insects are randomized. Otherwise, the insects chosen first may all occur in the same batch, and if their susceptibility is slightly abnormal; it will bias the mortality. Parasite is specie that feeds on the body of another without killing it and generally attacks only a single host. The eggs are usually laid upon the host. Among the insects, there are two general groups of parasites; those that attack vertebrates and those that attack insects. The former include (Anoplura) the bird lice (Mallophaga) some of the louse flies (hippoboscidae) and the fleas (Siphonaftera) (Gullan, 2016). Lice are parasitic insects that infest mammals. Infestation with lice is called Pediculosis. Hundreds of varieties of lice infest humans. Three common kinds are Pediculus Capitis (head lice) Pediculus Corporis (body lice) Pediculus Puris (crab lice). Pediculus Capitis is found on the scalp and tends to stay hidden in the hair; the nurse can suspect their presence in the clothing if (a) the person habitually scratches (b) there are scratches on the skin and (c) there are hemorrhagic spot on the skin where the lice have suck blood (Kozier and Erb’s, 2018). Lice require blood from the host and feed several times a day. The victim is often unaware of these silent passengers until itching occurs, which is a result of sensitization to louse saliva, develops several weeks later. Scratching can result in secondary bacterial infections. The head louse has legs especially adapted to grasp scalp hair. During a lifespan of a little over a month, the female louse produces several eggs (nits) a day. The eggs are attached to hair shafts close to the scalp. The very young stages of louse are also called nits. Empty egg cases are whitish and more visible. They do not necessarily indicate the presence of live lice. As the hair grows (at the rate of about 1cm a month), the attached nit moves away from the scalp. A point of interest is that the incidence of Pediculosis among blacks in the United States, lice have become adapted to the cylindrical hair shafts found in whites. In Africa, lice have adapted to the not cylindrical hair shafts of blacks (Tortora, 2018).
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- Summer '17
- SIR CARIL
- Head louse, Pediculosis, Body louse, Annona squamosa