 [ Symptoms ] can shrimp and french fries cooked in the same greese cause allergic reaction hi at the age of 40 i developed an allergie to peanuts and shellfish at the same time i had the test run they came back negative so i went to red lobster and two hours later was rushed to the hospital with a shellfish allergie two weeks later bought a snickers out of a vending machine back to the er [ Disease ] yes different foods cooked in the same oil could result in cross contamination as traces of the allergenic proteins may be left behind in the oil cross contamination can also occur on cutting boards grills and cooking vessels and utensils that are re used without cleaning when eating out at restaurants it is important that you be vocal and communicate your allergies with your waiterwaitress so that the cookchef can make the appropriate accommodations when preparing your food even if you do not think that the food that you are ordering contains any of your allergens it is better to have them check before you consume it to avoid further incidents it will be important to mention that you have an allergy regardless so that you can be assured that proper food handling techniques are used and that there will be no cross contamination i would also suggest keeping a food journal so that you can better identify your triggers and gain a better understanding of your reaction to certain foods in the case of severe anaphylaxis your doctor may equip you with an epipen so that you are able to stop allergic reactions fast any contact with a food you are allergic to can cause an allergic reaction best advice if you are allergic to shellfish never eat somewhere that serves it lobster is a shellfish and peanuts are in snickers stay far away from things you are allergic to and talk to your doctor about an epi pen