Shigellosis is an infectious disease caused by a group of bacteria called Shigella. Most who are infected with Shigella develop diarhea, fever, and stomach cramps starting a day or two after they are exposed to the bacteria. Shigellosis usually resolves in 5 to 7 days. Some people who are infected may have no symptoms at all, but may still pass the Shigella bacteria to others. The spread ofShigella can be stopped by frequent and careful handwashing with soap and taking other hygiene measures.