<prompt> Which organism causes haemolytic uremic syndrome:NeisseriaSalmonellaPseudomonasE. Coli  <response>: Ans. d E. ColiRef: Microbiology by Ananthanarayan and Paniker 8th ed. 276-77 Hemoltic uremic syndrome HUS is a type 3 hypersensitivity reaction associated with small vessel vasculitis. Organisms causing HUS is E.Coli particularly EHEC and shigella dysentriae. 