HUS stands for Hemolytic Uremic Syndrome, which is a rare but serious disease that affects the kidneys and blood clotting functions of infected people. It occurs as a complication of a diarrheal infection, usually caused by E.coli O157:H7 infection. The disease occurs more commonly in children under 5 years of age than in other age groups. Symptoms of HUS include vomiting, bloody diarrhea, stomach pain, fever, chills, headache, fatigue, weakness, fainting, bruising, and paleness. HUS cannot be diagnosed with one single test or indicator, but rather a panel of tests and evaluations. Treatment for HUS infection typically involves hospitalization, and may include special diets, blood transfusions, and kidney dialysis. Most people recover completely from HUS, but in some cases, it can be fatal.