Urinalysis is the most important lab test to determine the type of prostatitis.
Family Doctor.org - Prostatitis overview
When presented with symptoms characterizing prostatitis the doctor will ask questions about your medical history and the nature of the symptoms. Depending on the nature of your symptoms you may be asked to undergo some of the following tests to determine the correct diagnosis.
If the symptoms are severe and seem to be associated with acute bacterial prostatitis (ABP), a urine specimen may be all that is required to diagnose prostatitis.
If the symptoms do not show a clear case of bacterial prostatitis, a digital rectal exam will be done. The digital rectal exam will show if the prostate is tender, enlarged, or if there are bumps or irregularities. It may be slightly uncomfortable, but the test is brief. To learn more about DRE, click here.
In some cases, your doctor might be interested in analyzing an expressed prostatic secretion. In order to obtain this, your doctor will gently press on the prostate multiple times and collect the secretion with a tube or swab. The sample will be analyzed under a microscope and may also be cultured.
Referal to a urologist may also be necessary. A urologist may repeat some exams already performed. They may also request a cystoscopy to examine the prostate further. This test is completed in the hospital, and takes about ten minutes. For cytoscopy, a small telescope is inserted into the urethra after an anaesthetic gel is applied. This telescope allows the urologist to visualize your prostate and bladder, and see if there are any abnormalities or inflammation.