527,000 children under the age of 5 were reported to have died in 2007 in Africa and Asia from diarrhea due to rotavirus. Many deaths were likely unreported.
Bacteria and parasites also cause diarrhea. There are two kinds of poop that generally result from infection: bloody stools and rice water poop. I hope that you avoid the more serious infections. If you do find yourself on the toilet more frequently than you'd like, you can try this home remedy to rehydrate yourself:
3/4 tsp salt, 1 tsp baking soda, 4 tbl sugar, 1 cup OJ, 4 cups water
This replaces electrolytes and water. Sports drinks are too concentrated and do not hydrate enough.