How does bacteria get into the urinary tract?
Most bacteria enter the urinary tract from the fecal reservoir, entering the urethra into the bladder. Bacteria can also enter through the blood where the kidney is occasionally secondarily infected with Staphylococcus or the fungus Candida. A less common source of bacteria is direct extension from adjacent organs via lymphatics, such as a severe bowel infection or retroperitoneal abscess.
