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» LymeNet Flash » Questions and Discussion » Medical Questions » Band 30-31 Confirmation test?

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Author Topic: Band 30-31 Confirmation test?
kareamber
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Member # 20110

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I am considering having the confirmation test done through IgeneX although I've been told it isn't necessary.

Who else has had this? I've never heard of anyone testing NEG on this? Does this mean that cross reactivity really isn't likely??

Thanks.

--------------------
IgeneX IGG POS 30+ 31++++ 41++
IGM 30+ 31+++ 34IND 41IND 83-93IND
Quest NEG IGG 30 and 41 only

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Dekrator48
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I had this done but I don't think it was necessary because I had other lyme specific bands present as either + or IND.

--------------------
The fibromyalgia I've had for 32 years was an undiagnosed Lyme symptom.

"For I know the plans I have for you", declares the Lord, "plans to prosper you and not to harm you, plans to give you hope and a future". -Jeremiah 29:11

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kareamber
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Anyone else?

--------------------
IgeneX IGG POS 30+ 31++++ 41++
IGM 30+ 31+++ 34IND 41IND 83-93IND
Quest NEG IGG 30 and 41 only

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Pinelady
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I did. I think it is useless unless you got the jab.

--------------------
Suspected Lyme 07 Test neg One band migrating in IgG region
unable to identify.Igenex Jan.09IFA titer 1:40 IND
IgM neg pos
31 +++ 34 IND 39 IND 41 IND 83-93 +
DX:Neuroborreliosis

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kareamber
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I've never seen anyone who tests NEG to it! I think I've read that IgeneX rate is 96% thus leaving a 4% chance of a false positive caused by a virus...on band 31.

--------------------
IgeneX IGG POS 30+ 31++++ 41++
IGM 30+ 31+++ 34IND 41IND 83-93IND
Quest NEG IGG 30 and 41 only

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seekhelp
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Kareamber, I think you're misinterpreting that statistic for this question.
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Pinelady
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I was neg. yet at the same time +++31kDa . WB Igenex pos. I did

not get the jab. It does not mean my kDa band is

caused by something other than Bb. It simply means

it did not show in the sample. But I do think I have some viral load.

--------------------
Suspected Lyme 07 Test neg One band migrating in IgG region
unable to identify.Igenex Jan.09IFA titer 1:40 IND
IgM neg pos
31 +++ 34 IND 39 IND 41 IND 83-93 +
DX:Neuroborreliosis

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ChuckG
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[epitope IgM/IgG URL]
quote:
IGeneX also now offers a new 30-31kDa Confirmation IgG and IgM test. If results from the initial Western Blot are positive for bands 30 or 31, it is possible that these could be due to cross-reactivity with several different types of viruses. In this confirmatory test, highly specific recombinant antigens are used to validate that the positive result is not due to cross-reaction with viruses. If ONLY band 31 is positive and no other specific bands are positive, it is recommended to have tests #488 and #489 31 kDa epitope Igm/Igg to make sure borrelia hasn't crossed reacted with several possible viruses....but AGAIN ONLY IF BAND 31 ALONE is positive.

IGeneX website
quote:
A positive IgG result with clinical history may be indicative of Lyme disease. Patients with other spirochetal disease and/or who test positive for rheumatoid factor or Epstein Barr virus may have cross-reacting antibodies. A positive response in this, as in any antibody assay, indicates sensitization, not necessarily active disease. 12
quote:
because the literature suggests that rheumatoid conditions may lead to false positive IgM antibody responses, an ANA/DNA/rheumatoid factor screen may be ordered to rule out false positive reactions. Patients testing positive with serologic tests for syphilis may also test positive for the Lyme antibody tests.13-15
And, perhaps, the source of "96%"
Jyotsna S. Shah article
quote:
Using IGeneX criteria, the in-house assay sensitivity increased from 46% to 68% for IgG WB and from 76% to 81% for IgM WB. The specificity decreased from 99% to 96%. However, the overall in-house WB assay sensitivity increased from 76% to 89%.

You will note that the 96% number is specific to specificity!
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Pinelady
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Just my opinion but I think they use it for

patients who are possible vaccine patients to

prevent treatment for something that isn't really

there? Am I correct? But in any event I am not sure

that would be the case and it would be dependent on

the LLMD to decide? Meaning I do think it is

possible transmission was missed. Heck they

missed it in me for over 2 years.

--------------------
Suspected Lyme 07 Test neg One band migrating in IgG region
unable to identify.Igenex Jan.09IFA titer 1:40 IND
IgM neg pos
31 +++ 34 IND 39 IND 41 IND 83-93 +
DX:Neuroborreliosis

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kareamber
LymeNet Contributor
Member # 20110

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Well I haven't had the vaccine, I've been screened for RA several times which is neg, and I'm NEG for Syphilis.

I contacted my LLMD to see again if he thought it was necessary, but I haven't heard back yet. I don't want to scoop out the money if it isn't necessary.

--------------------
IgeneX IGG POS 30+ 31++++ 41++
IGM 30+ 31+++ 34IND 41IND 83-93IND
Quest NEG IGG 30 and 41 only

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