C2 Deficiency Type I C4017351
An immune deficiency affecting a specific complement protein. It can increase susceptibility to certain infections. Management involves infection prevention and monitoring.
Key facts at a glance
- ICD-10
- D89.9
- ICD-11
- 3A00.0
- Body system
- immunologic
- Severity
- moderate
- Chronic
- true
Signs and symptoms
Common signs and symptoms that may indicate this condition.
Warning signs - seek immediate care
Neisseria meningitis
Generalized symptoms
(immunologic)Noticeable symptoms that may vary in intensity over time.
Frequency: Common at all stages
Recurrent sinopulmonary infections
(immunologic)Lupus-like rash
(immunologic)Septic arthritis
(immunologic)Diagnosis and tests
How this condition is diagnosed and what test results mean.
Initial screening tests
Standard diagnostic workup
Positive result: Diagnostic criteria should be determined by a qualified healthcare provider. [Content pending medical review.]
Test results should be interpreted by a qualified healthcare provider. [Content pending medical review.]
Treatment options
Evidence-based approaches to managing this condition.
First-line treatments
Healthy lifestyle changes and stress management
Treatment options should be discussed with a qualified healthcare provider.
Prophylactic antibiotics
Long-term antibiotic prophylaxis to prevent recurrent bacterial infections common in complement deficiency. Choice of antibiotic based on individual infection history and sensitivities.
Infection surveillance and immune function monitoring
Regular clinical assessment for signs of infection and monitoring of immune parameters. Prompt evaluation and treatment of any febrile illness.
Additional treatment options
Vaccination with appropriate immunizations
Complete vaccination series including pneumococcal, meningococcal, and Haemophilus influenzae vaccines to compensate for increased infection susceptibility.
medicationInfection prevention practices
Implementation of hygiene measures, food safety practices, and avoidance of known infection exposures. Education on early signs of serious infection.
lifestyleImmune support and general wellness optimization
Supportive measures including adequate sleep, stress management, and nutritional support to maintain overall immune competence. Supplements may be considered based on individual needs.
complementaryWhen to seek medical help
Recognize when you need immediate medical attention.
Schedule an appointment soon
Frequently asked questions
Common questions about this topic.
What is C2 Deficiency Type I C4017351?
Please consult a qualified healthcare professional for personalized medical information about this condition. [Content pending medical review.]
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Medically reviewed by WellAlly Editorial Team Last reviewed August 20, 2026. · Read our editorial policy