Overview: Dengue IgM EIA TestIntroduction: The Dengue IgM EIA Test detects IgM antibodies to dengue virus, indicating recent infection causing fever or joint pain. Aligned with 2023 WHO 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 virology for patients with suspected acute dengue infections.
Other Names: Dengue IgM Assay, Recent Dengue Infection Test.
FDA Status: Laboratory-developed test (LDT), meeting virology standards for diagnostic accuracy.
Historical Milestone: Dengue antibody testing began in the 1980s with viral research. IgM-specific EIAs emerged in the 1990s, and by the 2000s, high-sensitivity assays improved accuracy.
Purpose: Diagnoses recent dengue infection, guides supportive care, and monitors antibody presence in patients with fever or joint pain.
Test Parameters: 1. Dengue IgM
Pretest Condition: No fasting required. Collect serum or saliva at any time. Report symptoms like fever or joint pain, and list recent travel to dengue-endemic areas.
Specimen: 2-5 mL serum (SST) or 1-2 mL saliva (sterile container). Centrifuge serum 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, joint pain, or travel to dengue-endemic areas. Include current medications, especially antipyretics.
Consent: Written consent required, detailing the tests purpose, diagnostic implications, and potential need for supportive care.
Procedural Considerations: Uses an enzyme immunoassay (EIA) to detect dengue IgM antibodies. Results are available in 1-2 days, enabling rapid clinical decisions.
Factors Affecting Result Accuracy: Cross-reactivity with other flaviviruses may cause false positives. Early infection may cause false negatives.
Clinical Significance: Positive IgM results confirm recent dengue infection, prompting supportive care. Negative results may require NS1 or PCR testing.
Specialist Consultation: Consult an infectious disease specialist for result interpretation.
Additional Supporting Tests: Dengue NS1 antigen, PCR, or IgG testing to confirm infection status or assess complications.
Test Limitations: False positives may occur with related viruses. Results require clinical correlation.
References: WHO Dengue Guidelines, 2023; Clinical Infectious Diseases, Guzman MG, 2022.
