How often do you have your child tested? CAP RAST or Skin prick??

Posted on: Fri, 10/04/2002 - 3:20pm
Cindia's picture
Joined: 06/05/2001 - 09:00

My son's allergist has requested that we get another RAST test since his last test was 18 months ago and he has not had any known peanut exposure or reaction since. He is 6 1/2 years old and his first reaction was to a peanut butter cracker at age 1.

His last score was 260, a low class 3. He does have mild asthma though well controlled. I was under the impression that his chances of outgrowing this allergy was not very good since he also has asthma.

We did get a new test on Wednesday. If these new results are not much different I will have to really think about whether I want to put my son through the anguish again. (He is really afraid of needles)

Do you have your child periodically tested to see if the levels have changed dramatically? If so, why?, how often?, and what type of test? My son has not had the skin test yet. I was wondering if you have seen any dramatic difference in test results? What wwere the circumstances? I'm not sure I really understand the reasons for retesting.

I guess I am cautiously hopeful. However, deep down I don't really believe his results will be that different. I will post his results when we get them, probably next week sometime.

Peanut-free wishes!

Posted on: Sat, 10/05/2002 - 1:14am
kcmom's picture
Joined: 12/18/2001 - 09:00

My dd will be two in a couple of days and I plan on having her CAP RAST done yearly. If we get a few good years with negative results, I will have them do a skin prick. If that is negative a food challenge. We are hoping that she outgrows PA so we want to keep an eye on her numbers. But we will not food challenge her until at least 4 or 5 years old to make sure her immune system is devoloped better.
It wouldn't hurt to take a look and see if his numbers have dropped. But the decision is totally up to you! You're the mom and know what's best for your child, don't let anyone pressure you in to something you are not comfortable with!
Take care! [img][/img]

Posted on: Sat, 10/05/2002 - 1:21am
California Mom's picture
Joined: 07/14/2000 - 09:00

I am currently planning to have my 7 year old daughter Cap Rast tested every two years. She has never had a skin test, and only was Cap Rast tested for the first time, this past December. Could it be that FAAN recommends the every two years? I'm not quite sure how I came up with it. Our allergist was initially against any testing. Her logic was that there was very little hope of outgrowing it, and since we knew she was allergic there was no reason to test her. I insisted, however, that I wanted a base line test so we could monitor her numbers over time and see if she could possibly be outgrowing it. This was after the new research showing that 20% of kids outgrow it came out, by the way. We found that she was between a class 5 and 6 for both peanuts and walnuts. Very discouraging. She hadn't had a reaction in over two years so I had become very hopeful that maybe she had outgrown it. I'm still hopefull that maybe we'll get some good news next time. I'm planning to have my (now) two year old son tested at the same time. Hopefully he will remain "unexposed" by then - I guess he'll be 3 1/2 at that time. I don't know if the allergist will agree with that, but that is my plan. Good luck to your son! I hope you will get great news this time. [img][/img] Miriam

Posted on: Sat, 10/05/2002 - 3:53am
ks65's picture
Joined: 03/06/2002 - 09:00

just my 2 cents worth....My daughter had a reaction when she was 13 months to PB. Swelled face, red rash that lasted for days. She blood tested a Class 3 (RAST). The doctor said it was not worth skin testing at that age, b/c the reaction was enough along with the blood test to diagnose PA. At 3 yrs old, the allergist told us that she would NOT skin test her again b/c of the risks of skin testing with a known PA, but she wanted to do the CAP RAST b/c we were doing it for other things - shellfish, tree nuts, etc. --WELL, all of her CAP RAST came back negative! Yes, negative. SO the allergist did a skin test for Peanut and it came back 4+...My DD was also skin tested for the tree nuts and shellfish and came back positive for Cashews 4 + ....It could be that she is outgrowing her PA...b/c her CAP RAST was negative and skin test postiive. BUT, we will most likely re-test the blood at 5 yrs old and then go from there...I know the doctor does not want to skin test again until 5...

Posted on: Sat, 10/05/2002 - 5:41am
anonymous's picture
Joined: 05/28/2009 - 16:42

I want sooo much to get my son retested (blood test), but my allergist doesn't see the need - "once allergic..." (yeah, yeah, yeah).
His first reaction was at 15 months, his skin test was at 18 months, a blood test (48,000+ on a scale of 0-18,000) at 2 1/2 years. We did a "touch test" on him when he was 4 - hives within 20 minutes. He will turn 6 the end of this month.
If we don't get to test him before then, I'm going to "politely demand" a retest when he's 8 1/2. [img][/img]
Good luck to you. I hope it turns out to be great news!!

Posted on: Sat, 10/05/2002 - 6:29am
Codyman's picture
Joined: 08/14/2002 - 09:00

My daughter had her first reaction at 2 years of age and was skin tested shortly after to confirm her Peanut Allergy. Her first Allergist disregarded my concern for her constant coughing/asthma and so we ventured to find a new allergist. The new allergist wanted yearly testing. She has since been re-tested yearly with a skin test. Two years ago, she tested a 4+ for peanuts and walnuts and 2+ for hazelnuts. Last year, she still reacted to Peanuts but showed no reaction to 'mixed' nuts so the doctor skin tested each nut individually and still no reaction. She still avoids all nuts but at least I know she is not allergic to Tree Nuts.
I like the yearly skin test as I can keep on top of any changes to their allergies and can ask any questions I may have. We don't see the allergist for anything else other than testing.

Posted on: Sat, 10/05/2002 - 9:58pm
lsmom's picture
Joined: 07/05/2002 - 09:00

Codyman -
I am surprised that your allergist recommends doing a skin test every year. My daughter had a negative RAST test, but a positive skin test. That combined with the fact that she had an anaphylactic reaction immediately after eating peanuts was enough for a diagnosis. Even with the negative RAST test, the allergist said we should wait a minimum of five years before retesting. His concern was that the skin test itself is an exposure and therefore not risk free.

Posted on: Sun, 10/06/2002 - 3:18am
ks65's picture
Joined: 03/06/2002 - 09:00

that is what my allergist basically said..although she is willing to do another CAP RAST at 5 years of age (did one at 3 yrs and was negative-skin was positive). She said we would go from there. If my daughter has had no exposures from 3 yrs until 5 and a negative CAP RAST again, we may try a skin test...but the issue is that each time you do it you you are exposing the person. I will wait for the allergist's guidance at 5 years. I am more worried about my daughter entering kindergarten and seeing where we stand. But, yes, I agree with what you say and your doctor...each skin test is an exposure!

Posted on: Sun, 10/06/2002 - 10:08am
Codyman's picture
Joined: 08/14/2002 - 09:00

Never really thought about it but I do see your point about each skin test and exposure. At my daughter's last test (which was with another new allergist b/c our Fabulous allergist moved to the States) the Allergist said see you in a year!! Will have to ask at our next app't how often my kids should be tested.
I guess that you don't see the Allergist that often ..... every few years??
On a side note, does anyone know if you can out grow allergies to insects?? My son will be tested for insects the same time I bring my daughter for her testing, although I know the the result will show that he has allergies to insects (Bees especially) I was wondering if he could ever outgrow this allergy??
[This message has been edited by Codyman (edited October 06, 2002).]

Posted on: Sun, 10/06/2002 - 11:26am
beansmama's picture
Joined: 10/03/2002 - 09:00

My daughter was actually tested for the first time 2 weeks ago. She came back with a class 2 PA allergy, based on RAST to peanut - and they want to retest her in one year.
But, our allergist also said that the reason they will keep retesting her is so that they have up to date information for schools, as she progresses. Since a PA allergy is considered a disability, an established papertrail will be a good tool to have.
She also said that the chances of growing out of the allergy is incredibly slim, but we'll retest just the same.

Posted on: Mon, 10/07/2002 - 10:00am
becca's picture
Joined: 05/22/2001 - 09:00

We are RAST testing yearly for the PA, or have so far. We happened to test tree nuts and sesame for the first time(RAST) this last visit because she had a + skin test last year to sesame and never any notable reactions. When I asked about this, stating *known* repeated exposures to sesame before I knew she might be allergic, he said a + skin test in the absence of reaction means no allergy. So, we do not necessarily avoid the sesame itself(cross contam. or such)per se, but I do not go out of my way to give her anything with them either yet!
I am digressing, but how is it known that one is defintely allergic if the RAST is negative and skin is positive. How is it decided for sure?
BTW, we have never done skin for peanut and only RAST to confirm initially after a supected reaction, and the year follow up because we were already drawing to check on the sesame. I really think our allergist would not test yearly as a rule, but it worked out since we were drawing blood for another. I am so glad we did it because her numbers dropped so low, from 10 down to 1.14, that I feel like there is some hope to outgrow it. becca


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