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Original Article

Immunology

Serum bactericidal activity against meningococcus in patients with systemic lupus erythematosus

Soyoung Lee, Kyung-Hyo Kim, Ji Hyen Lee, Han Wool Kim

Clin Exp Pediatr. 2025;68(5):362-369. Published online January 13, 2025

Question: What is the level of immunity against meningococcal infections in patients with systemic lupus erythematosus (SLE) under the age of 19, and is vaccination against meningococcus necessary for these patients, given their susceptibility to infections due to immunosuppressive treatments and disease characteristics?
Finding: Although some of our study patients exhibited serum bactericidal activity against meningococci, most remained seronegative.
Meaning: These findings suggest that patients with SLE who are at risk of meningococcal infection receive appropriate vaccinations.

DOI: https://doi.org/10.3345/cep.2024.01151

Case Report

A Korean familial case of hereditary complement 7 deficiency

Moon Kyu Ki, Kyung Yul Lee, Jun Hwa Lee

Clin Exp Pediatr. 2009;52(6):721-724. Published online June 15, 2009

Meningococcal infections can be associated with abnormalities of the complement system, which contains 5 terminal complement proteins. Furthermore, deficiencies in 1 of these 5, complement component 7 (C7), leads to the loss of complement lytic function, and affected patients show increased susceptibility to recurrent meningococcal meningitis and systemic Neisseria gonorrhoeae infection. In September 2003, an 11-year-old female patient presented at...

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