"The disease toll of this is stunning. Eighty percent of the world's illness is caused by fecal matter. A gram of feces can contain 10 million viruses, 1 million bacteria, 1,000 parasite cysts, and 100 worm eggs. Bacteria can be beneficial: the human body needs bacteria to function, and only 10 percent of cells in our body are actually human. Plenty are not. Small fecal particles can then contaminate water, food, cutlery, and shoes—and be ingested, drunk, or unwittingly eaten. One sanitation specialist has estimated that people who live in areas with inadequate sanitation ingest 10 grams of fecal matter every day.
Diarrhea—usually caused by feces-contaminated food or water—kills a child every fifteen seconds. That means more people dead of diarrhea than all the people killed in conflict since the Second World War. Diarrhea, says the UN children's agency UNICEF, is the largest hurdle a small child in a developing country has to overcome. Larger than AIDS, or TB, or malaria. 2.2 million people—mostly children—die from an affliction that to most westerners is the result of bad takeout. Public health professionals talk about water-related diseases, but that is a euphemism for the truth. These are shit-related diseases."