Immunological studies in patients with mumps orchitis

Area of Science:

• Immunology
• Virology
• Pathology

Background:

• Mumps orchitis is a common complication of mumps infection in post-pubertal males.
• The pathogenesis of testicular damage in mumps orchitis is not fully understood, but immune mechanisms are suspected.

Purpose of the Study:

• To investigate the role of immune responses in the development of testicular damage in patients with mumps orchitis.

Main Methods:

• Serological tests for antitesticular and antivirus antibodies.
• Delayed hypersensitivity skin tests using homologous antigenic material.
• Testicular biopsies for histological examination.

Main Results:

• Positive antitesticular antibodies in 25 out of 70 patients.
• Antivirus antibodies detected, with higher titers during remission.
• Positive delayed hypersensitivity skin reactions in several patients.
• Histological findings in biopsies consistent with autoimmune sensitization.
• Testicular damage correlated with positive skin tests, but not with circulating antibody titers.

Conclusions:

• Delayed hypersensitivity may play a role in the pathogenesis of testicular lesions in mumps orchitis.
• Immune mechanisms are implicated in the testicular damage associated with mumps orchitis.