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• n  inflammation of the kidney and its pelvis caused by bacterial infection

• When, for instance, does a urinary-tract infection become a pyelonephritis (an infection involving the kidneys and ureters)? There's no clear-cut answer.
• In many cases, pyelonephritis persists over many years.
• When, for instance, does a urinary tract (bladder) infection become a pyelonephritis (infection involving kidneys and ureters)? There's no clear-cut answer.

News & Articles

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• Research and Markets: Pyelonephritis - Pipeline Review, H2 2013
  Research and Markets has announced the addition of the "Pyelonephritis - Pipeline Review, H2 2013" report to thei
  Sept. 9, 2013 - Business Wire via Yahoo! Finance