Although less common than Salmonella or Campylobacter, Shigella is a significant cause of foodborne disease. Shigella is responsible for 10% to 20% of cases of bacterial foodborne illness each year in the United States.
A century later, it continues to be a marvel in modern engineering. The LA Aqueduct brought water from the Owens Valley hundreds of miles away to a growing area in need of additional resources to sustain its people and their endeavors, helping spur an economy that today rivals that of many nations.
The Aztecs kept their city clean by keeping the canals full of fresh water which came from the mountain springs. In periods of low rain and water, the city of Tenochtitlan would ask neighboring city states to open their canals and let the fresh water flow down. This was dangerous, as the Aztecs learned one season.