<prompt> An emerging viral pathogen causing pyelonephritis in kidney allografts is-Molluscom contagiosumHerpes simplex virusPolyoma virusInfluenza virus  <response>: polyoma virus cmain multiplication site is brainrenal celld.this virus is seen in urine of the patient who had undergone kidney transplant REF:ANATHANARAYANAN MICROBIOLOGY NINTH EDITION PAGE.554 