ANATOMY

Detailed explanation-1: -Pyelonephritis is inflammation of the kidney, typically due to a bacterial infection. Symptoms most often include fever and flank tenderness. Other symptoms may include nausea, burning with urination, and frequent urination. Complications may include pus around the kidney, sepsis, or kidney failure.

Detailed explanation-2: -Acute pyelonephritis is a bacterial infection causing inflammation of the kidneys and is one of the most common diseases of the kidney. Pyelonephritis occurs as a complication of an ascending urinary tract infection (UTI) which spreads from the bladder to the kidneys and their collecting systems.

Detailed explanation-3: -Pyelonephritis is an inflammation of the renal pelvis, partially involving the kidney tissue. The cause is usually an unnoticed or poorly treated urinary infection, as the bacteria are already primarily in the upper urinary tract or reach up into the kidneys and thus trigger a strong inflammatory response.

Detailed explanation-4: -Most often, the infection is caused by bacteria that normally live in your bowel. The urinary tract has several ways to prevent infection from moving up the urinary tract. For example, urination most often flushes out bacteria before it reaches the bladder.

Detailed explanation-5: -What causes a kidney infection? A kidney infection usually happens when bacteria – often a type called E. coli – gets into the urethra (the tube which carries urine out of the body) and travels up through the bladder and into the kidneys.