<prompt> About HUS all are true except -Most commonly caused by verocytotoxic ColiCauses mild to severe coombs positive hemolytic anemiaRecurrences rareTransient thrombocytopenia  <response>: Ans. b Causes mild to severe coombs positive hemolytic anemiaRef: Robbins 9thpg 942-943; 8thpg 952-953Typical HUS gives rise to coombs negative hemolytic anemia because autoantibodies are absent; HUS TTP have been explained in detail in the chapter 12 on Bleeding disorders. 