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Giardiasis

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Giardiasis is an infection of the small intestine by a protozoan, Giardia lamblia. It is spread via the faecal-oral route, most commonly by eating food contaminated by the unwashed hands of an infected person or by drinking groundwater polluted by the faeces of infected animals.

About two thirds of infected individuals develop no symptoms. Symptoms, when present, occur one to three days after infection and consist of diarrhoea, flatulence, and abdominal cramps, often accompanied by weight loss. In some cases the infection becomes chronic.
Chronic disease includes severe diarrhoea, gas in stomach, allergy, malnutrition, and stunted growth.

Giardiasis has traditionally been considered a tropical disease, but it is becoming more common in developed countries, especially among gay men and among groups of very young children in close contact with each other.

Click here to learn for more information about waterborne diseases, dimension of the problem, transmission, prevention.

Sources:
http://en.wikipedia.org/wiki/Giardiasis
Picture:
http://images.google.com/images?q=giarda&hl=en&lr=&rls=GGLD,GGLD:2005-12,GGLD:en&start=0&sa=N

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