Out of curiosity: I have a friend who had the same allergy... she switched to purely organic carrots and it went away. Does it work the same way with your wife?
I've got the same thing myself: allergic to uncooked carrots and most fruits (e.g. pears, cantaloupes). Started when I was a teenager-- actually figured out what was going on for the first time eating a bag of baby carrots. I've tried organic pears and didn't notice any of the usual burning/itching. Still afraid to start eating them on a regular basis, though...
I get allergies to them too (plus apples, bananas, strawberries, and a bunch of other fruit). The weird thing is that I could eat all of these things probably up until my early 20s (late 1990s), and now all I can do is stare and salivate.
FYI Mars bars help control the salivation.
Well, I'm allergic to those too, so it isn't much help ;)
Well, not exactly sure, but for apples (also triggers her allergies) organic doesn't help.
All of these she had no reactions when she lived in France.
Guess we should try the organic carrots some time.
Rather than thinking organic/inorganic, why not try different varieties of carrots? If you can't find a retailer that sells named varieties, try growing your own because seeds are always sold with the name. There's all sorts of types and colours: