2005年10月29日
Tungiasis[Diseases]
Tungiasis
Tungiasis is a skin infestation of the ''chigoe flea|Tunga penetrans'' flea (also known as chigoe flea, jigger, nigua or sand flea), found in the tropical parts of Africa, Caribbean, Central and South America, and India. This disease is endemic in Nigeria and Trinidad and Tobago where in the 1980s the prevalance of tungiasis among children approached 40%. It is rarely found outside these areas.The parasite|parasitic flea lives in soil and sand, and feeds intermittently on warm-blooded hosts such as humans, cattle, sheep, dogs, mice, and other animals. In order to reproduce, the female flea burrows head-first into the hosts' skin, often leaving the caudal tip of its abdomen visible through an orifice in a skin lesion. This orifice allows the chigoe flea to breathe while feeding on blood vessels in the cutaneous and subcutaneous dermal layer. In the next two weeks, the flea releases about 100 eggs through the orifice, which fall to the ground. The flea then dies and is sl!
oughed by the host's skin. Within the next three to four days, the eggs hatch and mature into adult fleas within three to four weeks.
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posted by ahme489 at 19:36|
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