A member asked:

What is the difference between elisa test and elfa test for hiv testing. i had a risky adventure and tested negative for hiv 1 and 2 as per elfa test.?

4 doctors weighed in across 3 answers

Always learning: Elfa is a variant on the elisa that is in use in some areas. I apologize for not having been familiar with it.

Answered 4/17/2016

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Dr. Darrell Herrington answered

Specializes in Family Medicine

Very similar: Enzyme linked fluorescent assay is a bit newer than enzyme linked immunosorbent assay. Both testing methodologies are very accurate and reliable.

Answered 8/18/2017

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Dr. Tony Ho answered

Specializes in Internal Medicine

Shorter detection: Elfa is the new version of the elisa test; it has about a 5 day shorter detection time, being 95% sensitive at 28 days.

Answered 1/24/2016

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