الفهرس 
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Abstract
Diarrhoea is defined as an increase in frequency, fluidity, or volume of bowel movements relative to the usual habit of each individual.
In some developing nations diarrhoeal attacks may
occur as frequently as once every month during a child’s
second year of life,
(2)
In Egypt, diarrhoea was
•
responsible for 65,5^8 out of 124,868 infant deaths in 1979, i.e 52.49% of infant mortality. ’
Acute mortality from diarrhoeal diseases is usually due to dehydration. Dehydration in diarrhoea starts with the first large, loose stools. Symptoms and signs are apparent when fluid loss is equivalent to 5% of body weight. Increasing deficits are manifested by tachycardia, severe thirst, dryness of the tongue, decreased skin turgor, oliguria, anuria, altered conciousness and hypotension. Shock is apparent when deficits reach more
than 10% of body weight, greater losses more than
(4) cause death.