(1) Urinary infection, at the acute stage, is primarily manifested as frequent, urgent and painful urination, lumbago or abdominal pain radiating down to the urethra, often accompanied by chills, fever, headache, lassitude, loss of appetite, nausea, etc. At the chronic stage, there may appear the same symptoms as those at the acute stage, but at a sudden onset of chronic urinary infection, the symptoms can be just as severe as those at the acute stage.
(2) There may be tenderness on costovertebral point, and positive percussion pain in the renal regions.
(3) Pyuria can be found in routine urine test. Under the high power lens, white cell count is often more than 5 per field, and leukocyte cast can also be found. Midstream urine reveals culture colony count>105/ml.
