What causes diarrhea?

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A brief look at what causes diarrhea. A simple explanation of how diarrhea occurs and what the underlying factors that cause diarrhea are. The video discusses bacterial, viral and parasitic causes of diarrhea including food borne illness and water borne illness and the various ways of transmission of diarrhea causing germs. Symptoms of diarrheal illness such as watery stool or loose stool, bloody stool, stomach pain and fever are mentioned as symptoms of invasive diarrhea and viewers learn to differentiate between invasive and non-invasive diarrhea. Travellers diarrhea (traveller's diarrhea) as a form of food poisoning is described clearly and viewers learn food poisoning symptoms and differentiation between acute and chronic diarrhea. How to treat diarrhea, how to cure diarrhea and remedies for diarrhea are discussed in part 2 on the series.