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Which Tests Should I Order, (ttg) Or (aga)?

dizzygrinch

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dizzygrinch Enthusiast
dizzygrinch
Posted

Hello, still researching on where to order tests. I found a website, direct labs, where I can order tests, and take the actual order to the lab near my home, in this case a labcorp, for testing. It sounds reasonable. They offer two different tests for celiac. One is the Tissue Transglutaminase Antibody Assay (tTG) and the other is the Anti-gliadin Antibody Assay (AGA). Can anyone help determine which test would be better? thanks in advance

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happygirl Collaborator
happygirl
Posted

tTG.

ravenwoodglass Mentor
ravenwoodglass
Posted

Have them do a complete panel, that would include both. If cost demands only one then do go with the Ttg. Do keep in mind though that the blood test does have false negatives, as does the biopsy so when you finish all your testing try the diet, strictly to see if it helps.

JennyC Enthusiast
JennyC
Posted

Total IgA

Ttg IgA

Ttg IgG

EMA (less accurate, but 100% specific for celiac)

Total blood count/chemistry

LDJofDenver Apprentice
LDJofDenver
Posted

I'm newly diagnosed (Aug 8 to be exact!) but here is what the University of Chicago Celiac Center says about testing:

"Which is the correct Screening Test?

Anti-Tissue Transglutaminase (tTG-IgA) -- A screening test is commonly used when an individual is in a risk group for Celiac Disease, whether or not he/she has symptoms. This test is usually the one offered for Celiac screening events, as it is the most sensitive test available. "

it lists other tests as well, and gives an explanation

here is a link to their website

Open Original Shared Link

Hope that helps, I know it can be overwhelming with all the information out there.

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  • Posts

    • Mark Conway
      Have I got coeliac disease

      By Mark Conway · Posted

      I did'nt know that, I will check what specifically the blood tests were for. Thanks
    • trents
      Seeking advice on potential gluten challenge

      By trents · Posted

      Sorry, @JudyLou, as reread your post, I see that you have had gene testing done already.
    • trents
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      By trents · Posted

      Welcome to the forum, @Mark Conway! Can you be more specific about the "coeliac" test your doctor did? There are more than one of them. What was the name of the test? Also, did he order a "total IGA" test? This is a test to check for IGA deficiency and should always be ordered along with the tests specifically designed to detect celiac disease. If you are IGA deficient, the IGA celiac blood antibody tests used to check for celiac disease per se will not be accurate. Also, if you have been cutting back on gluten before the tests, that will render them invalid. You must have be eating normal amounts of gluten for weeks/months before the blood draw to render valid test results.
    • Wheatwacked
      Blood Test for Celiac wheat type matters?

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