Originally Posted by
jiejie
There is no way, unfortunately, to deal with the issue of potentially contaminated utensils. Although I think the danger of secondary contamination may be a bit overblown. You should probably carry medication, an epi-pen, or whatever you must to combat inadvertent encounters arising from this sort of thing.
It depends on how sensitive someone is.
The reality is that cooks very often only rinse utensils between preparing dishes--anything oil-based on the utensils will transfer to the next dish being prepared. I have been nailed by such cross contamination once. Fortunately my problems don't run to the deadly kind, just unpleasant. As for the quantities involved--I have reacted to some contaminant in 3 milligrams of material.