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RAPID ANTIBODY
REFLECTS RECENT (IgM) AND PAST (IgG) INFECTION
STAGE 2: RAPID DIAGNOSTICS
Why Serology Testing for COVID-19?
• Typically, lgM peaks at day 5
• lgG peaks at 14-21 days
• lgM appears first and then slowly drops off.
As lgM disappears and lgG picks up, this indicates the patient is likely entering recovery and at some point no longer contagious. lgM and lgG are helpful bio-markers to make determinations of patient’s immune status, whether or not they are contagious, recovering, etc.
What is the Process?
Prick patient’s finger
Wick blood into capillary
Drop blood onto cassette
Add buffer
Results in 10 minutes
How accurate is COVID-19 IgG/IgM Rapid Test Device?
The COVID-19 IgG/IgM has been evaluated with the 113 blood samples obtained from patients exhibiting pneumonia or respiratory symptoms.
• The sensitivity of the IgM test is 87.9% and specificity 100% when compared to RT-PCR.
• The sensitivity of the IgG test is 97.2% during the convalescence period, and specificity is 100%
What is the significance of the various test results?
IgM negative, IgG negative: Patient not exposed or too early. A medical professional should observe symptoms and epidemiology of patients. Retesting should be considered if symptoms appear or persist.
IgM positive, IgG positive/negative: Acute or recent infection.
IgM negative, IgG positive: Previous, distant infection