“…The clinical diagnostic triad of HUS includes hemolytic anemia with a hematocrit (percent packed erythrocyte volume in blood) of less than 30, acute renal failure assessed by abnormally increased serum creatinine and BUN, and thrombocytopenia with a platelet count less than 150,000 per μL of blood 31,35,167 . The classic post-diarrheal HUS (D+HUS) prodrome begins with watery diarrhea that becomes bloody and painful in 95% of cases after a few days, though HUS can rarely occur without any diarrhea ( Figure 4) 31,32,36,43,60,152,158,[168][169][170][171][172][173][174] . Diarrhea is associated with cramping abdominal pain, a distended and tender abdomen, increased stool number with greater than 6 each day, and vomiting 158,173 .…”