<prompt> An emerging organism responsible for causing Pyelonephritis in Renal Allografts is?Polyoma virusHerpes virusHepatitis B virusRota virus  <response>: ANSWER: A Polyoma virusREF: With textAn emerging viral pathogen causing pyelonephritis in kidney allografts is polyoma virusREF: Robbins and Cotran pathologic basis of disease 7th edition Volume 1 page 1000The current average half-life of a kidney transplant is 8 to 10 years. Allograft loss can occur from rejection cell mediated or antibody mediated, recurrent urinary tract infections, polyoma virus associated nephropathy or recurrent kidney disease REF: Mayo Clinic Internal Medicine Board Review 9th edition by Amit Ghosh page 658 