Urinary tract infection (U71)

The clinical picture of urinary tract infection includes infections of the lower urinary tract (bladder, urethra) and the upper urinary tract / renal pelvis (i.e., pyelonephritis). The most typical presentation is ‘acute simple cystitis’, where there is no indication that the infection has extended beyond the bladder. This is generally caused by infection with the microbe Escherichia coli, a normal intestinal coloniser. Other bacteria such as Klebsiella pneumoniae and Proteus mirabilis are occasional causes of acute simple cystitis. Due to anatomic differences, a urinary tract infection is much more common in women than in men. Symptoms of a urinary tract