IGeneX Western Blot & IVIg

[ShaesMom]

I called their office and the gal who answered told me that IVIg would not affect the test results and that abx would only affect the Urine & PCR tests. Does this sound correct? I thought I had read some posts that said to wait awhile after IVIg.

[Suzan]

I called their office and the gal who answered told me that IVIg would not affect the test results and that abx would only affect the Urine & PCR tests. Does this sound correct? I thought I had read some posts that said to wait awhile after IVIg.

 

When I called last year, they said to wait 4 weeks after IVIG. I did get the same information as you did though about the abx though.

 

susan

[LNN]

I called their office and the gal who answered told me that IVIg would not affect the test results and that abx would only affect the Urine & PCR tests. Does this sound correct? I thought I had read some posts that said to wait awhile after IVIg.

 

I think my concern was that if some of the donors in our batch of immunoglobulin had been exposed to lyme, then a test that looked for lyme antibodies might show positive, but I wouldn't know if they were from donors or made by my son. So we waited for 10 weeks. No particular magic about 10. It was just when we had a doctor's appt and could get the test requisition signed.

 

The half life of antibodies is, I think, 21 days. So the longer you go after IVIG, the better the odds that any antibodies detected are "native" to your child.

 

I don't have any research to back this up. Just how I approached the test for our situation.