Orchitis

Background

• Inflammation of the testes
• See also Epididymo-orchitis

Microbiology

• Viral
  • Mumps virus: 15-30% of postpubertal males with mumps, unilateral in two-thirds
  • Coxsackie B virus, LCMV
• Fungal: blastomycosis
• Bacterial
  • May be from contiguous spread or hematogenous seeding
  • Includes Gram-negative bacteria, Brucella, and Mycobacterium tuberculosis

Clinical Manifestations

• Erythema, swelling, and tenderness of the testis
• Usually with concurrent epididymitis or prostatitis