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Chronic pyelonephritis implies recurrent kidney infections and can result in scarring of the renal parenchyma and impaired function, especially in the setting of obstruction. A perinephric abscess (infection around the kidney) and/or pyonephrosis may develop in severe cases of pyelonephritis. [23]
When it affects the lower urinary tract it is known as a bladder infection (cystitis) and when it affects the upper urinary tract it is known as a kidney infection (pyelonephritis). [9] Symptoms from a lower urinary tract infection include pain with urination , frequent urination, and feeling the need to urinate despite having an empty bladder ...
Urinary tract infection in pediatric patients is a significant clinical issue, affecting approximately 7% of fevered infants and children. [43] If left untreated, the infection can ascend from the bladder to the kidneys, resulting in acute pyelonephritis, which leads to hypertension, kidney scarring, and end-stage kidney disease. [44]
[7] [18] In women, they are the most common form of bacterial infection. [19] Up to 10% of women have a urinary tract infection in a given year, and half of women have at least one infection at some point in their lifetime. [4] [7] They occur most frequently between the ages of 16 and 35 years. [7] Recurrences are common. [7]
Pyonephrosis (from Greek pyon 'pus' and nephros 'kidney' [1]) is a dangerous kidney infection that is characterized by pus accumulation in the renal collecting system. [2] It is linked to renal collecting system blockage and suppurative renal parenchymal destruction, which result in complete or nearly complete kidney failure. [3]
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Nephritis represents the ninth-most-common cause of death among all women in the US (and the fifth leading cause among non-Hispanic black women). [ 19 ] Worldwide, the highest rates [ clarification needed ] of nephritis are 50–55% for African or Asian descent followed by Hispanic at 43% and Caucasian at 17%.
More specifically, in case of recurrent urinary tract infection, secondary infection can spread to adjacent intestine. [1] In addition to providing a scaffolding support for the tubular architecture, the interstitium has been shown to participate in the fluid and electrolyte exchange as well as endocrine functions of the kidney.