Decreased urine output
While the smaller urine output in cases of intestinal E. Coli infections signals dehydration, patients who report urinary infection followed by decreased urine output needs to be thoroughly examined. Sometimes, E. Coli strain may be very aggressive, or the patient’s immunity may be compromised, so the bacteria advance quickly through the bladder, up the ureters reaching the kidneys. This condition is known as pyelonephritis and may lead to kidney failure, which causes the decrease in urine output. Keep in mind that most patients fully recover from infections, so cases of simultaneous bilateral kidney failure due to E. Coli infection are very rare.