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Tuesday, March 29, 2011


As well as transmitting serious disease, the body louse pediculus humanus causes dermatitis and sleeplessness through itching, especially in poor crowded communities in cold countries.

Clinical features
The head louse, Pediculus capitis, is cosmopolitan and increasing in prevalence in British schools. It makes the child itch and alarms parents and teachers. Tiny white oval eggs 'nits', are seen attached to the base of hairs on the scalp. The crab louse is transmitted while sharing beds.
A single treatment with gammabenezene hexachloride (BHC) shampoo or lotion is usually curative. In countries, such as Britain, where resistance is developing to BHC, malathion or carbaryl is preferred.

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