Lucas was seen by an allergist today. His arms did indeed light up like a xmas tree.
TOTALLY AVOID PEANUTS. ANAPHYLAXIS IS POSSIBLE. USE EPIPEN AT FIRST SIGN OF ANY ALLERGIC REACTION ON EATING OR SUSPECTED EATING, EVEN IF REACTION IS ONLY MINOR, AND PROCEED IMMEDIATELY TO NEAREST HOSPITAL. AVOID ALL FOODS LABELLED "MAY CONTAIN (TRACES OF) PEANUTS" and "PROCESSED IN A PLANT THAT ALSO PROCESSES PEANUTS." Contaminated foods are just as dangerous: this could be as innocent as jam jars if a knife was ever used in the PB jar, PB cookie crumbs in an old cookie tin, PB caked onto a utensil after the dishwasher, etc.sigh
TOTALLY AVOID ALL DAIRY, EGG YOLK, EGG WHITE, GELATIN, JELLO, SOY, LAMB, and prolonged contact with CATS. ANAPHYLAXIS IS LESS LIKELY, BUT POSSIBLE depending on amount eaten. Use Benadryl if a minor allergic reaction happens on eating these foods accidentally. USE EPIPEN IF THE REACTION WORSENS OR IS SEVERE (e.g., body hives, facial swelling, trouble breathing, etc) and proceed to nearest hospital.
Avoid these foods as a precaution: NUTS, SHELLFISH, FISH.
These foods are unlikely to cause an allergic reaction, but if it occurs, stop the food: Flax, sesame and other seeds, beef, veal, wheat, barley, canned tuna, canned salmon, soy oil, soy lecithin, and soy sauce.
So, at least now we know (exactly) what we're dealing with, and we also know what we don't have to deal with: strawberries, capsicum (green peppers), corn and beef are all ok, as are dogs and rabbits. Nothing to report on environmental issues, like dust mites, spores and such either.
Luckily, there are a few decent recipe sites like http://www.fastq.com/%7Ejbpratt/recipes/allergiesintol/desserts.html that can help us find safe alternatives to everyday foods. It'll be hard on us though, when he'll ask why he can't have what other kids are all having...