Some offices will just do a dipstick test, and that's not looking under a scope. If they are looking under a scope, they might see white blood cells, but I've seen patients who have no white blood cells, and have gonorrhea or chlamydia, so its not the best way to determine if you have an std. You really need specific testing for that. Urine tests are the gold standard for diagnosing bladder infections. But one common test, ... Will a urinalysis show a bladder infection? ... to determine whether bacteria, blood or pus is in your urine. If so, he or she may request a urine bacterial culture. Cystoscopy. Urinary Tract Infection -.