Cholera occurs in epidemics. Bacterial diarrheas peak is more common during the the rainy season. Enterotoxigenic coli called ETT is an important cause of diarrhea. The diarrhea is mainly watery. Parasitis such as amoebiasis and giardiasis also can cause diarrhea, although not so commonly.
Diarrhea is seen when the an infant is teething.
Irritation due to erupting teeth leads frequently to the infant invariably putting contaminated fingers in the mouth. It is more commonly seen when the infant is being weaned from breast feeding. Other causes are diseases such as sprue, celiac disease etc. Most of the pathogenic organisms that cause diarrhea are transmitted primarily or exclusively by the faecal-oral route. The aim of oral fluid therapy is to prevent dehydration and reduce mortality.