Kosek, Bern, and Guerrent (2003) estimates a global median incidence of Diarrhoea to be 3.2 episodes Merson (1982) and by Bern et al. (1992) as well as to those reported in the first edition of Disease Control Priorities in Developing Countries (Jamison et al. 1993). Yet every child in Bangladesh suffers an average of three to five diarrhoeal attacks in each year, which is a major contributor to malnutrition. According to the statistical survey, around 125,000 children under five die each year from diarrhoeal disease; that is, 342 children per day (IPRSP 2002). Bangladesh, has been experiencing a rapid increase in population over the past two decades. People migrate to Dhaka and the most migrants work in marginal employment at very low wages and live in squatter and slum settlements with few basic services that are porne to develope Diarrhoea.


CAUSES OF DIARRHOEA

A hundred or more different diseases can be associated with Diarrhoea. Fortunately, the most of the severe causes are rare and the most common form is the one that affects the most of us for a few days each year. It is due to a simple infection, usually caused by a virus, called Rota virus.
 

Bacterial infections can cause more serious cases of Diarrhoea as a result of having contaminated food or drinks (food poisoning). Common bacteria are campylobacter, salmonellae and shigella organisms; less common are Escherichia coli (E coli), yersinial, listerial and cryptosporidial bacteria. These can cause fairly severe Diarrhoea with vomiting, abdominal cramping and fever.

       CAUSES OF CHRONIC DIARRHOEA

        Osmotic Diarrhoea

       Secretory Diarrhoea

       Inflammatory conditions

       Malabsorption syndromes

       Motility disorders

       Chronic Infections