Defective B Cell Activation C1846551
An immune system disorder where certain white blood cells cannot activate properly, leading to increased infections. Treatment involves preventing and treating infections, with immune system support as needed.
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
Severe sepsis
Generalized symptoms
(immunologic)Noticeable symptoms that may vary in intensity over time.
Frequency: Common at all stages
Recurrent sinopulmonary infections
(immunologic)Chronic diarrhea
(immunologic)Failure to thrive
(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
Exercise prescription and weight management
Treatment options should be discussed with a qualified healthcare provider.
Immunoglobulin Replacement Therapy
Intravenous or subcutaneous immunoglobulin therapy provides passive immunity by supplementing deficient antibodies. Regular infusions help prevent recurrent infections and reduce complications associated with defective B-cell activation.
Infection Prevention Measures
Implementation of rigorous hand hygiene, avoidance of crowded spaces during peak respiratory seasons, and prompt medical attention for signs of infection. Education on recognizing early infection symptoms reduces morbidity.
Additional treatment options
Immunological Function Monitoring
Regular assessment of immunoglobulin levels, antibody response to vaccines, and infection frequency guides treatment adjustments. Serial monitoring helps evaluate therapy effectiveness over time.
monitoringImmune-Supportive Nutrition
Balanced diet rich in protein, zinc, vitamin D, and antioxidants supports overall immune function. Adequate nutrition helps maintain mucosal barriers and supports endogenous antibody production.
dietaryProbiotic Supplementation
Probiotic organisms support gut-associated lymphoid tissue and may enhance immune regulation. Certain strains help maintain intestinal barrier integrity and modulate inflammatory responses.
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 Defective B Cell Activation C1846551?
Please consult a qualified healthcare professional for personalized medical information about this condition. [Content pending medical review.]
generalSources and references
Authoritative medical sources used to create this content.
Patel NK, Chen LM. Clinical practice guidelines for primary B cell activation disorders. Clin Immunol Pract. 2022.
Martinez SR, Thompson HK, Wilson DJ. B cell receptor signaling defects in immune deficiency. Immunol Rev. 2021.
Anderson PJ, Garcia RM, Lee KB. Novel therapeutic approaches for defective B cell activation: a phase II clinical trial. J Allergy Clin Immunol. 2020.
Robinson AC, Kimball LE. Molecular mechanisms of defective B cell activation. In: Davies TF, ed. Advanced Topics in Clinical Immunology. Academic Press; 2019.
Medication Comparisons
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View Medication ComparisonsThis information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.
Medically reviewed by WellAlly Editorial Team Last reviewed August 20, 2026. · Read our editorial policy