From what I have read, the skin-prick test is actually considered more reliable. That surprised me a bit. If there is a reaction on the skin you can be certain that there is an allergy to a given food. The blood test measures specific allergic antibodies in a person's blood. It seems that many people can actually eat something that they test positive to with the blood test. I am wondering if these things are on the low or high reaction scale? And I also wonder if there is no reaction, seemingly, is there an adverse reaction that is harder to track? For instance, if gluten intolerance is not addressed it has been known to cause fertility issues in women. Other things that I have read suggest that the blood test is most helpful in determining the level of allergy, on a numeric scale. Our doctor often breaks down Ella's blood test results in categories like "low, moderate, high, and severe". Soy is in the low category, whereas pistachios are in the severe category. One of the biggest advantages to the skin-prick test is that it is much cheaper to do. Personally, I like knowing what I am up against. Is this beast little or BIG?
Ella and I will be getting hers and hers matching skin-pricks next month. I will be quite curious to see how all of that will stack up against her previous blood tests.
Another friend, who's child has severe food allergies just had some extensive testing done on her 2 year old son. He has horrible issues with asthma and they have seen several specialists who have not helped this poor child's situation. Now they are seeing a doctor who does blood, urine and fecal testing. She matches allergy results with genetic testing. It sounds like a fascinating and thorough process. It took my friend several months to get all the results from the tests. The information that they got back was shocking. He is allergic to a great many things including, wheat, gluten, corn, soy, all nuts, watermelon, cantaloupe, coconut, plus many, many more. Thankfully, he is not allergic to rice which will now be the foundation of his diet. Their doctor is suggesting vitamin supplementation with his new diet. My friend is feeling overwhelmed by all of this, as you can imagine. It is sort of like doing a rigorous obstacle course just to get dinner on the table. All day, every day. And this kid is only 2! I hope that all of this hard work will have a payoff very soon.