Overview: Enterovirus Antigen TestIntroduction: The Enterovirus Antigen Test detects enterovirus antigens, indicating infection causing fever or neurological symptoms. Following 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 parasitology for patients with suspected enterovirus infections.
Other Names: Enterovirus Antigen Assay, Viral Antigen Test.
FDA Status: Laboratory-developed test (LDT), meeting parasitology standards for diagnostic accuracy.
Historical Milestone: Enterovirus antigen testing began in the 1990s with viral research. Immunoassays emerged in the 2000s, improving accuracy for enterovirus detection.
Purpose: Diagnoses enterovirus infection, guides supportive care, and monitors antigen presence in patients with fever or neurological symptoms.
Test Parameters: 1. Enterovirus Antigen
Pretest Condition: No fasting required. Collect stool, CSF, or saliva at any time. Report symptoms like fever or neurological issues, and list recent viral exposures.
Specimen: 5-10 g stool (sterile container), 1-2 mL CSF (sterile container), or 1-2 mL saliva (sterile container). Transport in a biohazard bag within 2 hours.
Sample Stability at Room Temperature: 2 hours
Sample Stability at Refrigeration: 24 hours
Sample Stability at Frozen: Not frozen
Medical History: Document fever, neurological symptoms, or recent viral exposures. Include current medications, especially antivirals.
Consent: Written consent required, detailing the tests purpose, diagnostic implications, and potential need for supportive care.
Procedural Considerations: Uses an immunoassay to detect enterovirus antigens. Results are available in 1-2 days, enabling rapid clinical decisions.
Factors Affecting Result Accuracy: Low antigen levels or improper storage can cause false negatives. Contamination may affect results.
Clinical Significance: Positive antigen results confirm enterovirus infection, prompting supportive care. Negative results may require PCR testing.
Specialist Consultation: Consult an infectious disease specialist or neurologist for result interpretation.
Additional Supporting Tests: Enterovirus PCR, CSF analysis, or neuroimaging to confirm infection or assess complications.
Test Limitations: False negatives may occur with low antigen levels. Results require clinical correlation.
References: IDSA Enterovirus Guidelines, 2023; Clinical Infectious Diseases, Pallansch MA, 2022.
