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Allergic complications of meningococcal disease. II. Immunological investigations
Abstract:
Immunological investigation of four patients with meningococcal meningitis who developed arthritis or cutaneous lesions showed circulating meningococcal antigen at the time of presentation in each patient. It was cleared from the circulation over the next few days. Circulating antibody was detectable in three of the four patients about a week after the onset of the illness. A marked fall in the serum C(3) level occurred in two patients at about that time. Deposits of meningococcal antigen, immunoglobulin, and C(3) were detected in the synovial fluid white cells of the two patients studied and in one of three skin biopsies examined. These findings suggest that the arthritis and cutaneous lesions of meningococcal meningitis may be due to immune complex formation.
Insights
Meningococcal meningitis can cause arthritis and skin lesions due to immune complex formation. This study found meningococcal antigen, antibodies, and complement deposits in affected patients, suggesting an immune response.
Area of Science:
- Immunology
- Infectious Diseases
- Rheumatology
Background:
- Meningococcal meningitis is a serious bacterial infection.
- Arthritis and skin lesions can be complications of meningococcal meningitis.
Purpose of the Study:
- To investigate the immunological mechanisms underlying arthritis and cutaneous lesions in meningococcal meningitis.
- To determine the role of immune complex formation in these complications.
Main Methods:
- Studied four patients with meningococcal meningitis presenting with arthritis or skin lesions.
- Assessed for circulating meningococcal antigen and antibodies.
- Measured serum complement C3 levels.
- Examined synovial fluid and skin biopsies for antigen, immunoglobulin, and C3 deposits.
Main Results:
- Circulating meningococcal antigen was detected in all four patients at presentation and subsequently cleared.
- Antibodies were detected in three patients about a week after illness onset.
- Serum C3 levels dropped significantly in two patients around the same time.
- Deposits of meningococcal antigen, immunoglobulin, and C3 were found in synovial fluid white cells and skin biopsies.
Conclusions:
- The findings suggest that arthritis and cutaneous lesions in meningococcal meningitis are likely caused by immune complex formation.
- Immune complex deposition in tissues triggers inflammatory responses leading to these clinical manifestations.