A urinary tract infection (UTI) is an infection in any part of your urinary system — your kidneys, ureters, bladder and urethra. A urinary tract infection, or UTI, is an infection in any part of your urinary system, which includes your kidneys, bladder, ureters. Urinary tract infections (UTIs) affect your urinary tract, including your bladder (cystitis), urethra (urethritis) or kidneys (kidney infection). A urinary tract infection (UTI) is an infection that affects part of the urinary tract. When it affects the lower urinary tract it is known as a bladder. A urinary tract infection (UTI) is an infection of the urinary system. This type of infection can involve your urethra (a condition called. What is a urinary tract infection (UTI)? UTIs are common infections that happen when bacteria, often from the skin or rectum, enter the. The urinary system is the body's drainage system for removing wastes and extra water. It includes two kidneys, two ureters, a bladder, and a urethra. Urinary. Fast facts on urinary tract infections · Women have a lifetime risk of over 50 percent of developing a urinary tract infection (UTI). · Common symptoms include a. UTIs are a relatively common condition. They can involve infection of the bladder, urethra, ureters, or kidneys. The most common cause is bacteria, though they. A UTI is when bacteria gets into your urine and travels up to your bladder. UTIs cause more than million visits to health care providers each year.