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Recurrent infections and staphylococcal liver abscess in a child with C1r deficiency

B Z Garty1, M E Conley, S D Douglas

  • 1Division of Allergy and Immunology, Children's Hospital of Philadelphia, University of Pennsylvania Medical School 19104.

The Journal of Allergy and Clinical Immunology
|October 1, 1987
PubMed

Insights

A rare C1r deficiency in a young boy led to severe staphylococcal infections, including a liver abscess. This case highlights complement system importance in immunity.

Area of Science:

  • Immunology
  • Genetics

Background:

  • The complement system is crucial for innate and adaptive immunity.
  • Deficiencies in complement components can lead to increased susceptibility to infections.

Observation:

  • A 2.5-year-old boy with Puerto Rican heritage presented with a staphylococcal liver abscess.
  • His history included recurrent pneumonia, lymphadenitis, otitis media, and pneumococcal bacteremia.

Findings:

  • Complete absence of the C1r portion of the first component of complement was identified.
  • C1s levels were 50% of normal, C4 was elevated, while other immunologic tests were normal.
  • This is the tenth reported case of C1r deficiency, notable for the unusual liver abscess presentation.

Implications:

  • This case expands the known clinical manifestations of C1r deficiency.
  • It suggests a potential link between C1r deficiency and increased susceptibility to staphylococcal infections.
  • Further research is needed to understand the specific role of C1r in defense against Staphylococcus aureus.

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