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Confused about RAST test

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1 reply [Last post]

Mon, 12/13/2010 - 14:30

karimcmurtrie

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Joined: 03/31/2010

My 3yr old Daughter who was diagnosed at 1.5yrs with a peanut allergy has scored a 4 on the scratch test when she was diagnosed and again this year. They wanted her to get the RAST test and it came back a class 3. The nurse said a class 3 was a low level and that next year if its low we might want to do an oral challenge in the office. I guess I am confused. From what I've read a class 3 is a high level. I asked for the number and all the nurse said she could tell me was that it was a class 3 but told me keep doing everything the same. We carry an Epi pen. Any input would be great. This is our first RAST test.

Wed, 12/15/2010 - 13:45

mom on a mission

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Joined: 08/27/2009

Personally, I'd ask to talk with the doctor. With a positive skin test and RAST test, that's a pretty good indication that she has an allergy to peanuts. I agree that you might want to follow up with an oral challenge, but in the meantime, I'd want clarification about the Class 3 results. My daughter is also a Class 3 (High Level of Allergen Specific IgE), and we've been told by our doctors at Duke that while the IgE number doesn't give an indication of the severity of the reaction it does give the likelihood of a reaction. If you are in the upper range of Class 3 which my daughter is, then there is a 95% chance of having a reaction if exposed to any peanuts.

Here's a link to a chart with the RAST scores and Classes (http://peanutclinicaltrial.blogspot.com/search/label/RAST%20test.

Just my opinion, but I'd want to know the actual IgE number, and I'd keep an Epi on hand until I had talked with a doctor.

Mom on a Mission
www.peanutclinicaltrial.blogspot.com

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Mom with a Mission
www.peanutclinicaltrial.blogspot.com

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Mom with a Mission
www.peanutclinicaltrial.blogspot.com

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