a mild reaction

Posted on: Fri, 08/06/2004 - 10:28am
mistey's picture
Joined: 01/18/2004 - 09:00

This was so bizarre. Last night my ds had green beans right out of my mil's garden. He put it up to his lips and immediately broke out in hives around his mouth. Then he rubbed the bean across his face and there was a red line straight across his face where the bean had been.
He was allergy tested (CAP RAST) about a year ago and was negative for green beans. He has had green beans out of the can usually at least once a week for over a year.
Could it be because it was fresh and not processed? Or could it be because I only steamed them for 3 minutes? (My dh said they were undercooked- still fuzzy )

Posted on: Fri, 08/06/2004 - 11:40am
Peg541's picture
Joined: 12/29/2002 - 09:00

Is that Oral Allergy Syndrome? Look it up, I have no experience with it but others here do.

Posted on: Fri, 08/06/2004 - 11:41am
momma2boys's picture
Joined: 03/14/2003 - 09:00

mistey, im sorry your son had a reaction [img]http://uumor.pair.com/nutalle2/peanutallergy/frown.gif[/img] . I wonder if they were undercooked if it could be oral allergy syndrome?
I don't know, I can't help much, but I agree it is bizarre. Let us know if you figure anything out.

Posted on: Fri, 08/06/2004 - 11:45am
srujed's picture
Joined: 09/05/2003 - 09:00

I'm not sure but I think I read somwhere that some fertilizers may have peanut products in them, were the plants fertilized with anything? Just an idea, not sure if there is any credibility to it or not...

Posted on: Fri, 08/06/2004 - 11:47am
momma2boys's picture
Joined: 03/14/2003 - 09:00

Peg, we were posting at the same time, great minds think alike [img]http://uumor.pair.com/nutalle2/peanutallergy/smile.gif[/img]
Canadian Food Inspection Agency
Fact Sheet
What is an

Posted on: Fri, 08/06/2004 - 11:49am
momma2boys's picture
Joined: 03/14/2003 - 09:00

Cross-Reactions Among Various Foods
It is common to find positive responses for IgE to several beans in individuals who are clinically reactive to one type. Using RASTs, Barnet et al screened sera from 40 patients with peanut allergy against 10 other legumes and demonstrated IgE binding to multiple legumes for 38% of patients. Bernhisel-Broadbent and Sampson studied 62 children with allergy to at least 1 legume and found that 79% had serologic (positive RAST) of IgE binding to more than 1 legume, and 37% binding all 6 legumes.
Despite the high rate of cross-sensitization, clinical cross-reactions are uncommon, as demonstrated by studies of allergenic legumes, such as peanut and soy. Among 113 children with atopic dermatitis evaluated with DBPCFCs only 1 (0.8%) had clinical allergy to both foods, despite 19% reacting to peanut and 5% to soy. Bock and Atkins studied 32 children with peanut allergy confirmed by DBPCFC and found that 10 (32%) had a positive skin test response to soy, but only 1 (3% of those with peanut allergy) had a clinical reaction.
In considering a wide variety of legumes, only 3 (1.8%) of 165 children with atopic dermatitis evaluated with DBPCFCs reacted to more than 1 legume, despite 19% reacting to at least 1 legume. Bernhisel-Broadbent and Sampson specifically addressed the issue of legume cross-reactivity by performing open tests or DBPCFCs in 69 highly atopic children with at least 1 positive skin response to a legume. Oral challenge to the 5 legumes (peanut, soybean, pea, lima bean, and green bean) resulted in 43 reactions in 41 patients (59%). Only 2 (5%) of 41 with any 1 positive challenge reacted to more than 1 legume. The authors concluded that elimination of all legumes in individuals with clinical reaction to 1 legume was unwarranted, despite the high prevalence of patients with multiple legume-positive skin prick tests (SPT) responses.
These studies did not include large batteries of legumes, and it may be that particular types are more allergenic or cross-reactive. In an evaluation of children with peanut allergy in France, 11 (44%) of 24 had positive skin prick test response to lupine, and of 8 subjects who underwent DBPCFC (6 children) or labial challenge (2 children) to lupine, 7 reacted.
Regional dietary habits and pollen exposure may influence the epidemiology of legume allergy. In Spain, for example, allergy to lentil was more common than allergy to peanut, and of 22 children with lentil allergy evaluated for reactions to other legumes, 6 had a history of reacting to chickpea, 2 to pea, and 1 to green bean. These findings raise suspicion for multiple legume allergy on those reacting to lentil, lupine, and chickpea, but more studies in a variety of geographic settings are needed to quantify the risk.

Posted on: Sat, 08/07/2004 - 8:42am
mistey's picture
Joined: 01/18/2004 - 09:00

Thank you all so much- the oral allergy syndrome sounds exactly like what happened to him. I guess I need to start doing some more digging. I have never heard about it before now. I wonder, then, is it safe to feed him well-cooked or canned green beans since he has never reacted to them or his he "allergic" "allergic" and can't have them (if that makes any sense!). I'm worried now that I've been giving him something to which he is allergic all this time.

Posted on: Sat, 08/07/2004 - 9:10am
momma2boys's picture
Joined: 03/14/2003 - 09:00

My understanding is that it is only raw, uncooked foods that cause OAS. If it is well cooked it shouldn't be a problem. I would check with the allergist though.

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