Found this info while searching the net. Perhaps the Doctor could comment on the two sentences in bold print below.

Consumer Information - Epididymitis

GENERAL INFORMATION. epididymitis is an inflammation of the epididymis,an oblong structure attached to the upper part of each testis.
http://www.urosoc.org.au/info/epididymitis.html

Extractions: Some rarer types of bacteria create a different picture altogether. Tuberculosis, for instance, is a bacteria that can spread to the epididymis in unusual circumstances. Tuberculosis epididymitis develops very slowly over days and weeks. Non bacterial epididymitis simply means an inflammation of the epididymis not caused by a bacteria. The causes are many and include viruses, trauma, and unknown causes. The unknown causes are commonly referred to in medicine as 'idiopathic' - an unknown cause. Non-bacterial epididymitis can be just as painful and with a very quick onset. The viral types may be associated with fevers and generalized weakness and ill feeling. Epididymitis caused by trauma or the 'idiopathic' types are not usually associated with the fevers and chills and generalized symptoms. MANY BELIEVE THAT THESE TYPES OF EPIDIDYMITIS ARE CAUSED BY A RUPTURE OR BLOW-OUT OF THE SPERM DUCTS CAUSING A LEAKAGE OF SPERM FLUID INTO THE TISSUE. THE BODY TISSUES CAN BE QUITE IRRITATED BY THIS LEAKAGE AND HENCE THE REDNESS AND SWELLING. The treatment for these types of epididymitis may include antibiotics just to prevent bacteria from infecting the area whose resistance has been weakened