Definition of Diarrhea:- The passage of three or more than three episodes of loose stool within a 24 hours period is called Diarrhea . Types of Diarrhea:- 1.Acute Diarrhea 2.Chronic Diarrhea Causes of Diarrhea:- A.Bacterial:- 1.E.coli 2.Salmonella 3.Shigella 4.Vibrio cholera B.Viral:- 1.Rotavirus (most common) 2.Enterovirus 3.Adenovirus C.Fungal:- 1.Candida D.Parasitic:- 1.Giardia lamblia 2.E.histolytica E.Other:- 1.Malabsorption 2.Food poisoning 3.Laxative abuse. Definition of acute Diarrhoea:- Acute Diarrhoea (<4 weeks) is usually due to infection and is often self limited. It's may be associated with fever and dehydration. Etiology (Causes):- 1.Viral 2.Bacterial 3.Protozoal Clinical features (Sign and symptoms):- 1.Increase frequency of loose stool 2.Abdominal Pain or cramps 3.Fever Features of dehydration:- 1.Reduced skin turgor 2.Sunken eyes 3.Dry mouth 4.Tachycard...