Overview: Candida Mannan Antigen TestIntroduction: The Candida Mannan Antigen Test detects Candida antigens, indicating fungal infection causing fever or skin rashes. Aligned with 2023 IDSA guidelines, it uses an immunoassay for high sensitivity, aiding in infectious disease screening. This test is critical for guiding diagnosis, treatment, and improving outcomes in immunology for patients with suspected fungal infections.
Other Names: Candida Antigen Assay, Fungal Infection Test.
FDA Status: Laboratory-developed test (LDT), meeting immunology standards for diagnostic accuracy.
Historical Milestone: Candida antigen testing began in the 1980s with fungal research. Immunoassays emerged in the 1990s, and by the 2000s, high-sensitivity assays improved detection accuracy.
Purpose: Diagnoses Candida infections, guides treatment, and monitors antigen levels in patients with fever or skin rashes.
Test Parameters: 1. Candida Mannan Antigen
Pretest Condition: No fasting required. Collect serum or plasma at any time. Report symptoms like fever or rashes, and list medications like antifungals.
Specimen: 2-5 mL serum (SST) or 2-4 mL plasma (EDTA). Centrifuge within 1 hour. Transport in a biohazard bag within 8 hours.
Sample Stability at Room Temperature: 8 hours
Sample Stability at Refrigeration: 7 days
Sample Stability at Frozen: 6 months
Medical History: Document fever, skin rashes, or risk factors like immunosuppression. Include current medications, especially antifungals or immunosuppressants.
Consent: Written consent required, detailing the tests purpose, diagnostic implications, and potential need for antifungal therapy.
Procedural Considerations: Uses an immunoassay to measure Candida mannan antigen levels. Results are available in 1-2 days, enabling rapid clinical decisions.
Factors Affecting Result Accuracy: Antifungals or immunosuppression may reduce antigen levels. Hemolysis or improper storage can degrade samples.
Clinical Significance: Positive results confirm Candida infection, prompting antifungal therapy. Negative results may require PCR or culture testing.
Specialist Consultation: Consult an infectious disease specialist for result interpretation. A dermatologist referral is advised for skin involvement.
Additional Supporting Tests: Candida PCR, fungal culture, or imaging to confirm infection or assess extent.
Test Limitations: False negatives may occur with low antigen levels. Results require clinical correlation.
References: IDSA Fungal Guidelines, 2023; Clinical Infectious Diseases, Pappas PG, 2022.
