Comment V E Coli is the most common cause of urinary infection and accounts for approximately 90% of first urinary tract infection in young women v Flank pain is associated with upper tract infection Urinary tract infection can result i bacteremia with clinical signs of sepsisComment E.Coli is the most common cause of urinary infection and accounts for approximately 90% of first urinary tract infection in young women. Flank pain is associated with upper tract infection. Urinary tract infection can result in bacteremia with clinical signs of sepsis