pyelonephritis

1. (pathology) An ascending urinary tract infection of the renal pelvisExamples: "The urinogenous or ascending nephropathies are divisible into two great groups (a) the hydronephrotic nephropathies and (b) the pyelonephritides."; "The frequent spontaneous resolution of cystopyelic reflux after 10 years of age induces to consider at least part of the apparently primary pyelonephritides as secondary to yet disappeared refluxes and, thus, to allocate in this group most of the so-called atrophic pyelonephritides of the young, often monolateral or mostly affecting one kidney, with sterile urine and almost normal urinary sediment."; "2001, Jeffery Hughes, 12: Infectious Diseases, N. A. Hughes, Clinical Pharmacy, Macmillan Health, 2nd Edition, page 215, Primary acute pyelonephritis most commonly occurs in females, with 90% of cases caused by Escherichia coli."Synonyms: pyelitis