New to site Question on Blood and Skin Prick Test

Posted on: Wed, 04/27/2011 - 12:10am
kellidpeterson's picture
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Joined: 04/27/2011 - 07:06

My son just turned 3 and tested positive with a wheal of 11 for peanuts and also positive for oak trees. He then had the blood test done and that came back negative. My son also has ecsema and I read that can cause a false positive on the skin prick test. The allergist has recommended that he avoid all peanuts still and be retested in 1 year. He has never had a reaction to anything unless it has been some skin issues that I haven't related to the peanuts. It just seems crazy to me to have to live with this fear for 1 more year when I really don't feel is allergic. Has anyone had any situation such as this?

Posted on: Mon, 05/02/2011 - 7:03am
cervonil's picture
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Joined: 04/28/2010 - 12:30

that's interesting. Maybe ask him for a peanut challenge in his office, so it can be monitored. Or see another allergist.

Posted on: Tue, 05/03/2011 - 1:10am
clarab's picture
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Joined: 05/03/2011 - 07:43

Its not uncommon for skin prick tests to be inaccurate for food allergies. However, what I usually hear is that they may miss food allergies, particularly ones that don't provoke skin reactions (i.e. no hives) such as oral allergies. I believe false positives are also possible. I would suggest that due to the severity of peanut allergies, it might be wise to follow the doctors orders.

Posted on: Thu, 05/05/2011 - 5:03am
Samantha418's picture
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Joined: 04/11/2011 - 12:44

I would get a blood test, they are more accurate.

Posted on: Thu, 10/06/2011 - 1:36pm
rtgraham2's picture
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Joined: 10/06/2011 - 20:25

I agree. Blood tests are the only way to be certain. My 11 son first reacted at age 5 months old after getting a piece of his brothers PB&J sandwich. He didn't react until the next morning with full body hives. Prior to this, when he was 4 months old, his legs would swell and blister like raw meat, really wierd. We now know it was, more than likely, the peanut oil we were frying our Christmas turkey in. Just having it in the air was enough to trigger his reaction. I took him into the allergist and at at 7 months they tested him. Skin prick didn't respond but injection under the skin blistered up immediately.
We've been super vigilant every since. Educating family, friends, school teachers, parents, etc. Most people are very open to the education on this topic.
My son was just re-tested last week. He still has a class 6 allergy to peanut. He wanted to be one of the 1% who outgrow it. :)
We still avoid Chick-fil-a, Five Guys burgers, Dairy Queen, etc. Anywhere that cross-contamination might occur. Halloween, Easter, etc. are always a nightmare.

Peanut Free Store

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