You've heard about the most shocking defecation story related to Nepal, haven't you? United Nations peacekeeping troops from Nepal are thought to have been so lax in digging latrines in their camps that they introduced cholera to Haiti when stationed there after the earthquake there. Until then, the island of Haiti had never had a reported case of cholera, but now cholera is endemic in Haiti.

http://www.sciencedirect.com/science/article/pii/S1198743X14...

http://www.npr.org/templates/story/story.php?storyId=2114342...

http://www.slate.com/articles/news_and_politics/foreigners/2...