What is the cause of most cases of pyelonephritis?

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Quizplus · Accepted Answer

Most cases of pyelonephritis are caused by an ascending infection by E. coli, which can travel up the urethra, bladder, and ureters, and infect the kidneys. Other bacteria, such as Klebsiella, Proteus, Pseudomonas, and Enterococcus, can also cause pyelonephritis, but E. coli is the most common culprit. Abnormal immune response, dialysis or other invasive procedure, and virulent bacteria in the blood are less common causes of pyelonephritis.

What Is the Cause of Most Cases of Pyelonephritis