Wednesday, July 6, 2011

TROPICAL DESEASES 1









TROPICAL DISEASES

These are infections, and infestations met with in warm countries
situated between the two tropics.
They can occur elsewhere if the climate were to change to warm, in Global warming.

They form a vary large part of the diseases that you will see in
your practice.
The treatment is mainly the use of drugs but there
are specific stages of disorders where surgery is required.

1. AMEBIASIS

Amebiasis is a widely prevalent parasitic infestations encountred
in medical and surgical practice in the tropics.
It has no racial prediliction and the disease is endemic in most tropical areas.
- Infection with E. histolytica is acquired by the ingestion of
food or water containing mature cysts.
- In alkaline small bowel environment excystation, and division
occur, to form trophozoites,(amebic form) which became lodged in
the crypts of the cecum, where they usually live as commensals
(encystations take place as fecal material solidifies) and the
cysts are passed out with feces.
- Cysts of E.histolytica, in a cool moist surroundings may remain
viable for a month and are resistant to common germicides and
chlorinated water but are destroyed by heat over 50oC.
- The life cycle is represented in diagram above.

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