rast test

1 reply [Last post]
By carjen on Thu, 07-19-01, 02:22

My daughter recently had a rast test done for her peanut allergy. She is 8 years old and reaction free for the past 6 years. I got the results from the nurse today she didn't know what they meant i was wondering if anyone could shed some light for me. Our doctor is gone until next Wednesday and i can't wait to find out. The result was positive .37 she said that anything over .35 was very sensitive. Any info would be help. Thanks so much.
Carleys mom

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By BCUZILUVHIM on Thu, 07-19-01, 23:42

Hi Carjen! Is it an ImmunoCAP RAST or a regular RAST? ImmunoCAP is measured in kU/L and the RAST is measured in IU/mL.

A 0.37 in an ImmunoCAP falls in the Class I range which is considered a low positive. The classes go up to VI.

A 0.37 in a RAST test falls in the around the mid Class II. which indicates increasing levels of specific IgE antibody. Again the class goes up to VI.

The immunocap is a more specific test and it will tell you with 95% certainty that there will be a likelihood of a reaction. Not the severity but the likelihood.

My son was tested 3 weeks ago and they accidently did a RAST and not an ImmunoCAP Rast as I and the Dr. had requested. The Rast came back a 51.89(putting him in Class V almost Class VI) Waiting on the results of the Immunocap, my Dr. called the lab yesterday to have them re-run the test with the ImmunoCap. Best wishes!! Fran [img]http://uumor.pair.com/nutalle2/peanutallergy/smile.gif[/img]

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