CAP-RAST scores and outgrowing PA

Posted on: Thu, 03/14/2002 - 6:37am
anonymous's picture
Joined: 05/28/2009 - 16:42

I attended FAAN's allergy conference in Baltimore last weekend. There seems to be a lot of questions regarding CAP-RAST scores and outgrowing PA on this board, so I thought I'd share a bit of Dr. Robert Wood's presentation with everyone.

(For those of you who don't know, Dr. Wood has been conducting research at Johns Hopkins on outgrowing PA, is himself allergic, and is an excellent pediatric allergist. I speak from experience since he is my daughter's!).

Dr. Wood's research originally showed that about 21% of children outgrow their PA; an update on this research indicates the number is slightly higher! Even some children who experienced severe reactions have been known to outgrow their allergy (although the odds were better with milder reactions). A RAST less than 5 means 60% likely to outgrow; a RAST less than 2 means 70% likely.

Dr. Wood said he would not consider a food challenge unless the RAST was less than 5. He said he would not bother to do a skin test to confirm an outgrown allergy because there is such a high false positive (however, false negative skin tests are uncommon).

He said a very important key to outgrowing allergy is strict avoidance -- even foods that don't seem to cause a reaction can still affect the ability to outgrow peanuts if the protein is present even in small amounts.

He also noted it was important not to base your treatment plan on IgE levels -- that they are not necessarily proportionate to one's reaction. Also, he said EVERY peanut allergy is potentially life threatening -- that previous reactions do not necessarily predict future reactions.

But on a positive note: he believes we are 5-10 years away from an effecive treatment! Let's pray he's correct!

If anyone has an opportunity to attend a FAAN conference, I highly recommend it. I found it very informative.

Posted on: Thu, 03/14/2002 - 6:48am
smack's picture
Joined: 11/14/2001 - 09:00

Kami's Mom,
Thank you, that was very informative and well written!

Posted on: Thu, 03/14/2002 - 10:11am
BENSMOM's picture
Joined: 05/20/2000 - 09:00

Thanks Kami's mom. I also went to Dr. Wood (just once.) He gave me good info. Thanks for posting.

Posted on: Thu, 03/14/2002 - 10:22am
Corvallis Mom's picture
Joined: 05/22/2001 - 09:00

Just for clarification here, is that a CLASS 5? or is this 5 kU/L IgE? (which would be what, class 2?)
Obviously, there is a substantial difference!
Very good information!

Posted on: Thu, 03/14/2002 - 12:32pm
kcmom's picture
Joined: 12/18/2001 - 09:00

When you said about strict avoidance, even to foods that don't seem to cause a reaction, does that mean any food in the legume family. Of course we avoid anything that may contain peanut or any nut anything, that's given. But, my daughter does eat green beans and peas with no problem, should we avoid these also as they are in the legume family. Also should we avoid things that have a reported cross reaction for people like gums (guar, xanthum etc). She has had no problem with these either, even though I still watch for them, she had them before i knew they may cross-react. My daughter scored a 5.94 KU/L so we are on the line and I want to give her every possible chance to grow out. Thanks!

Posted on: Fri, 03/15/2002 - 1:33am
anonymous's picture
Joined: 05/28/2009 - 16:42

In response to questions:
Corvalis Mom: 5 refers to the actual CAP-RAST score, not the classification (sorry, I don't know the units of measurement).
kcmom: When Dr. Wood referred to strict avoidance, it's my understanding he was referring to the cross-contamination issue. The main culprits he cited for this were baked goods, candy, ice cream, and ethnic (esp. Chinese) foods. He seemed to be concerned about parents feeding their children these types of foods, reasoning that since they don't react they must be ok.
He did not mention avoiding other legumes. However, he did tell me at my daughter's last appointment that she should avoid lentils. He said they are the only other legume cross-reactive with peanuts. Hope that helps to clarify.

Posted on: Fri, 03/15/2002 - 10:25am
kcmom's picture
Joined: 12/18/2001 - 09:00

Thanks Kami's mom, that does help! [img][/img] I had myself a little panic there thinking maybe I should not be feeding her veggies! I'm okay otherwise because I do not feed her any of the others. Only homemade things from scratch so we know exactly what is in. My mom is loving making homemade ice-cream! Thanks again!! [img][/img]

Posted on: Mon, 04/22/2002 - 12:35pm
brenda's picture
Joined: 01/22/1999 - 09:00

Kami's Mom,
Thanks for Dr. Wood's info on lentils being the only legume cross-reactive with peanuts. My PA daughter eats peas and string beans and has been tested for many legumes by CAP RArST-- they only legume she tested positive for was Lentil (she has never eaten it)!

Posted on: Thu, 05/09/2002 - 11:21am
Sandy's picture
Joined: 05/27/2002 - 09:00

Great information! I thought that once you have a severe allergy to peanuts, you never grow out of it. You just gave me a little hope. I also heard 8 years ago that that were coming up with a blocker for p.a. people. Now you say that we have to wait another 5-10 years more! What a drag.... Oh well, at least they are working on it! My allergist said to stay away from peas, beans (anything that is a legume). The only green veggies we eat are broccoli, asparagus and occasionally cabbage.

More Community Posts

Peanut Free and Nut Free Community

create a new community post
Latest Post by penelope Mon, 10/14/2019 - 12:56pm
Comments: 0
Latest Post by penelope Mon, 10/14/2019 - 12:52pm
Comments: 1
Latest Post by Italia38 Tue, 10/08/2019 - 12:19pm
Comments: 3
Latest Post by Italia38 Tue, 10/08/2019 - 12:18pm
Comments: 1
Latest Post by penelope Mon, 10/07/2019 - 7:19pm
Comments: 2
Latest Post by penelope Mon, 10/07/2019 - 7:16pm
Comments: 10
Latest Post by penelope Mon, 10/07/2019 - 7:13pm
Comments: 13
Latest Post by penelope Mon, 10/07/2019 - 7:10pm
Comments: 9
Latest Post by mom2two Mon, 09/16/2019 - 1:03pm
Comments: 18
Latest Post by desmond Mon, 09/16/2019 - 1:00pm
Comments: 1
Latest Post by desmond Mon, 09/16/2019 - 12:58pm
Comments: 19
Latest Post by TeddyCan Mon, 09/09/2019 - 4:32pm
Comments: 10
Latest Post by DTurner Mon, 09/09/2019 - 4:31pm
Comments: 5
Latest Post by B.M.18 Mon, 09/09/2019 - 4:30pm
Comments: 3
Latest Post by abolitionist146 Mon, 09/09/2019 - 4:28pm
Comments: 2
Latest Post by nutfreenyc Mon, 09/09/2019 - 4:19pm
Comments: 4
Latest Post by AllergicTeen2 Mon, 09/09/2019 - 4:18pm
Comments: 2

More Articles

You might have wondered if small amounts of an ingredient can be added to a food product without being declared on the food’s label. The FDA...

Is it possible to eat your way to a food allergy cure? Scientists think it’s...

There are many reasons why you may want to substitute almond flour for wheat flour in recipes. Of course, if you have a...

Not all oils are created equal. Some oils are high in saturated fats or in trans-fatty acids – not good for general health. Some are partially...

It may never be safe to begin feeding peanut butter to your baby or toddler if you have peanut allergies in your family. If either parent or one...

More Articles

More Articles

What is a peanut allergy? It is a reaction that occurs in the body after eating peanuts or peanut...

For those with severe food allergies, flying can be a stressful process. Here are...

Approximately one out of 13 children under age 18 are allergic to at least one food, though many of them will outgrow their allergy by the age of...

Fact 1: Over a third of food allergy reactions happen after the first known oral...

The reason why some people are affected by allergies while others are not begins in their genes. Allergies are passed down from generation to...

Here’s a tip that might someday save your life, or that of a loved one: two to four times a year, review the proper way to use your epinephrine...

Lactose intolerance is the inability to process lactose, a sugar found in milk, caused by the lack of a needed enzyme. Those with lactose...

Food Allergen Labeling and Consumer Protection Act (FALCPA)

An important part of peanut allergy awareness was enacted on January 1, 2006...

Tomato allergies are very rare. They are a "type 1 allergy," which means a contact allergy. When a person with this type of allergy touches a...

Milk allergies are becoming more common, especially in babies and small children. There is some confusion about what is an allergic reaction and...

Recognizing food allergy in babies or toddlers is not always easy, but there are specific risk factors and signs that parents and other caregivers...

Burlap bags are often used to store and ship coffee beans, potatoes, rice, seeds, nuts, and peanuts. They can be one of the disguised...

People with pollen allergies need to stay away from some foods. If you have allergic rhinitis in the spring or fall, you may not realize that you...

Of course, everyone knows that if you have a peanut allergy that you should avoid peanuts, peanut butter, peanut butter cookies and foods that...

Eating at a nut-free lunch table in school is a safety precaution that causes some students to feel isolated from their peers. Unfortunately,...