Inherited Deficiency of the Ninth Component of Complement Associated with Streptococcal Infection |
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| Authors: | Mitsue Fujita M.D. Teizo Fujita M.D. Shinya Inai M.D. |
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| Affiliation: | Division of Pediatrics, Tsukuba Gakuen Hospital, Tsukuba, Ibaraki;Department of Biochemistry, Fukushima Medical College, Fukushima;Department of Clinical Pathology, Osaka Medical College, Osaka |
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| Abstract: | A 7 year old boy, who presented with streptococcal infection, was found to have a low serum complement level (CH50). The C9 component was undetectable. His CH50 rose to the normal value and remained normal for at least three weeks, but decreased to one-third of the normal level three months later. Family studies were consistent with a familial C9 deficiency, with autosomal co-dominant inheritance. |
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| Keywords: | C9 deficiency, Familial, Autosomal co-dominant, Streptococcal infection. |
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