can IgE type reactions be delayed?

[BeantownBaby9]

DS has been trialing chicken broth and chicken since Tuesday. I thought it was going well, no sleep disturbances, no change in attitude. But yesterday, he woke up with a rash of hives all over just his back. Today there are just a few on his arms, legs and chest, I think maybe 10 total, and the back is much better. I thought hive type reactions were instantaneous or at least within the day of the food. FYI, we flew to Tampa on Wed night, so maybe its the heat or a grimey plane or not our bed/sheets. He's had nothing else besides BM and Elecare with the chicken trial. Do you think chicken is failing?

[Multimomma]

Originally Posted by BeantownBaby9

DS has been trialing chicken broth and chicken since Tuesday. I thought it was going well, no sleep disturbances, no change in attitude. But yesterday, he woke up with a rash of hives all over just his back. Today there are just a few on his arms, legs and chest, I think maybe 10 total, and the back is much better. I thought hive type reactions were instantaneous or at least within the day of the food. FYI, we flew to Tampa on Wed night, so maybe its the heat or a grimey plane or not our bed/sheets. He's had nothing else besides BM and Elecare with the chicken trial. Do you think chicken is failing?

what kind of chicken broth? homemade? storebought? brand?

[Chinese Pistache]

IME, yes, but we've only dealt with eczema not hives, so I'm not sure how that works. For us, it's typically something like a build-up reaction, with the offending food being consumed over several days until it finally reaches a tipping point. I've never had the experience of one of my kids eating an offending food on a single day and then, having a reaction to it days later.

In your case, with all the possibilities, I'd probably wait until the skin clears up and try chicken again.

[BeantownBaby9]

it was whole foods chicken and homemade broth, only simmered with a piece of kelp. I think it seems like a build up effect too. So, if I only give it once every 4 days, is it ok or should it be off the list?

[Chinese Pistache]

Originally Posted by BeantownBaby9

it was whole foods chicken and homemade broth, only simmered with a piece of kelp. I think it seems like a build up effect too. So, if I only give it once every 4 days, is it ok or should it be off the list?

Hives are associated with an IgE "true" allergic reaction, so no, you would need to stay away from it completely for at least 6 mths, a year or longer is better, imo.

[ASusan]

Well, we've tested positve (RAST and SPT) to egg and peanut. AFAIK, this means his rxns are IgE mediated, and his primary reactions to these foods were delayed - eczema, primarily. Sometimes, his cheeks would redden immediately, but not always. To my knowledge, he has never had hives.