Peanut allergy scale?

Posted on: Wed, 11/21/2012 - 1:17am
jeremy54235's picture
Joined: 11/21/2012 - 07:53

My son had a reaction to peanut butter when he was 1yr. Allergist drew blood and tested which he as at a 9. He is now almost 4 and we just had him retested (blood test) and he is now at 14. We always carry epi pens for him. How severe is a 14? The allergist did not take the time to talk with us. I searched online to try to find a general scale but did not come up with anything. Thanks for any input you share.

Posted on: Thu, 11/22/2012 - 9:07am
cathlina's picture
Joined: 06/29/2001 - 09:00

Here is the scale. I am an almost "3" on the RAST scale and still have had reactions. It sounds like he had a CAP RAST test which is very sensitive allergy test.
Class 0 (<.35)
Class I (.35-.7)
Class II (.7-3.5)
Class III (3.5-17.5)
Class IV (17.5-50)
Class V (50-100)

Posted on: Fri, 11/23/2012 - 10:24am
jeremy54235's picture
Joined: 11/21/2012 - 07:53

Thank you.

Posted on: Wed, 12/05/2012 - 12:22am
DiagnoseTreatPeanut's picture
Joined: 12/05/2012 - 06:38

The peanut IgE level is concerning at 14 kU/l. Based on selected data from peanut allergy clinics, this has a 95% likelihood of peanut allergy, but the risk of reaction really depends on which specific peanut proteins he is sensitive to. Some proteins such as Ara h 2, are associated with a high risk of reacting to trace peanut, other peanut proteins are as risky as green beans and apples.
Because there are many allergen proteins in peanut you can't really tell from the IgE level alone. As well, children in grade school develop pollen allergies (tree, grass, ragweed) which cross-react with the peanut ImmunoCAP but carry only the risk of a runny nose or itching eyes. You really can't use the peanut IgE level to follow risk after about age 4; kids acquire other cross-reactive sensitivities and often the IgE to peanut increases but the risk of reacting may not. This is a cause of consternation for parents who strictly avoid any exposure to peanut but see the IgE levels increase.
If you would like to know the actual risk of reaction you could ask your doctor to order a peanut component panel so that you and your doctor have a much clearer idea of risk and progress. Be cautious if there is IgE to Ara h 2, anything over 0.35 kU/l; this would make a peanut challenge unnecessary.
I hope this helps. Keep in mind the history of reacting or not reacting to peanut trumps the lab value no matter how high or low.

Posted on: Wed, 12/05/2012 - 12:56am
jeremy54235's picture
Joined: 11/21/2012 - 07:53

Thanks for sharing all the great information. I was not aware of any of this! My son does also have bad seasonal/environmental allergies as well. His allergist now has us giving him claritin and flonase daily and that seems to really be helping for those allergies. Before he would go through about a half a box of tissues a night. We are supposed to follow up with his allergist in a couple months to see how things are going so i will ask about peanut component panel.
We also have a younger daughter and were going to get her tested for the peanut allergy when my son has his follow up appt. Would you recommend get her tested for peanuts because of her brothers allergy to it?
Thanks again for all the info.

Posted on: Wed, 12/05/2012 - 1:12am
DiagnoseTreatPeanut's picture
Joined: 12/05/2012 - 06:38

Most parents feel better knowing if a sibling is also peanut allergic. You could start with a the ImmunoCAP to peanut alone, and if this is more than about 1 kU/l order the peanut panel.
You might consider having the labs drawn ahead of time so that you and your doctor will be able to discuss the results and come up with a treatment plan during the visit.

Posted on: Wed, 03/12/2014 - 6:34am
eastcoastmom's picture
Joined: 10/09/2012 - 06:35

I just got our peanut component test back. It said my dc has a 1.2 to the ara2. I am confused. The doctor said he would still want to do a office challenge to this. He added that component testing is more helpful at this point in bringing in a child who had a rast over say a 15 which would not be a number to challenge but if their component was all to ara8 it would be worth it. Wondering why another doc wouldn't challenge at all if there was ara2 that had any IGE. Also wondering if anyone has known children who have outgrown even with serious allergy. My son started at a 2 and is now a 1.2 so I am hoping to hear someone with a positive story:)

Peanut Free and Nut Free Community

Click on one of the categories below to see all topics and discussions.

Latest Discussions

Latest Post by Sarah McKenzie Fri, 05/22/2020 - 12:57pm
Comments: 6
Latest Post by JRM20 Wed, 05/20/2020 - 9:30am
Comments: 5
Latest Post by justme Mon, 05/18/2020 - 12:36pm
Comments: 45
Latest Post by krisztina Thu, 02/20/2020 - 4:49pm
Comments: 1
Latest Post by chicken Thu, 02/20/2020 - 4:45pm
Comments: 3
Latest Post by lexy Tue, 01/28/2020 - 12:21am
Comments: 6
Latest Post by JRM20 Sun, 01/26/2020 - 11:15am
Comments: 6
Latest Post by Italia38 Wed, 01/15/2020 - 11:03am
Comments: 10

Peanut Free Store

More Articles

It Is Easy To Buy Peanut Free Chocolate Online

Ask any parent of a child with a potentially life-...

Peanuts can cause one of the most serious allergic reactions of all food products. Researchers speculate...

Tree nuts and peanuts are distinctly different. An allergy to one does not guarantee an allergy to the other. Peanuts are considered legumes and...

Whether you have a child with a peanut allergy or you are sensitive to packing a nut-free lunch out of concern for other people’s children, it is...

The most frightening thing about a severe allergic reaction to a new food is that it can happen so fast. If parents are not looking for allergic...

Those with severe peanut allergies soon learn to look for the 'peanut-free sign' on any packaged food purchase. This is a notation found on a wide...

Cakes are a central part of many celebrations, from kids' birthdays to weddings. For those with severe ...

For many people with peanut allergies, baked goods present one of the most significant risks. Even if...

A recent study published in the Journal of American College of Nutrition by Mahnaz Rezaeyan Safar and a number of her colleagues has found some...

Chronic Obstructive Pulmonary Disease (COPD) is an overarching term for a number of progressive lung diseases, including emphysema, chronic...

For individuals suffering from chronic obstructive pulmonary disease (COPD), managing the symptoms and avoiding exacerbations can be a full-time...

Psoriasis is a chronic skin condition that causes itchy patches of inflammation and scale on your skin. The severity of psoriasis symptoms varies...

Kim Kardashian, an immensely famous reality star and the wife of acclaimed rapper Kanye West, has spoken out about her struggle with psoriasis....

Paul Wilson, a long-term marathon runner and asthma sufferer, is urging other people with asthma to support a new campaign aimed at raising...

Psoriasis is a common skin condition that causes a buildup of cells on the skin surface, resulting in dry, red patches on the body and/or face....

Sufferers of Rheumatoid Arthritis (RA) will tell you that the most difficult symptom to deal with is morning stiffness. With nearly 90 percent of...

Knowing which medication is right for you can often be a confusing and overwhelming process. The specific type of asthma medication you require...

Psoriasis is a chronic autoimmune condition that causes painful scaly patches on the skin. Although psoriasis is a very common skin condition,...

Although there are multiple treatments available for rheumatoid arthritis (RA), those suffering from the condition can still find themselves...

Patients undergoing biologic treatment for psoriasis, a relatively common inflammatory skin condition, have seen a reduction in arterial plaque...