Urinary tract infection, conceptual image. Computer artwork of bacteria (blue) in puddles of urine, representing their presence in the urinary system. The urinary tract is usually sterile, therefore the presence of any micro-organism is termed a urinary tract infection (UTI). If the bladder is inflamed it is called cystitis and if one or both kidneys are involved it is called nephritis. Women are more prone to UTIs as their urethra (tube that carries urine to the outside of the body) is shorter. Treatment is with antibiotics.
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