Orchitis is an inflammatory condition of the testes or testicles which was diagnosed in 13 (0.35%) pet dogs
(Table 1). It is commonly caused by a bacterial infection where the bacteria enter the testes via the urine,
prostatic secretions, blood, mucous membranes or trauma like a puncture wound. Other infectious agents that
have been reported to cause orchitis include canine distemper virus, fungal infection (blastomycosis and
coccidioidomycosis) and tick borne diseases (ehrlichiosis and rocky mountain spotted fever). Clinically
characterized by sudden pain, scrotal swelling, lethargy and reluctance to stand or walk.