The unexplained bouts of sneezing and wheezing, runny nose, hives or fever are triggered by exposure to an allergen which means any substance that is capable of triggering an allergic reaction in body causing irritation, swelling or fever .
A large section of people are allergic to crustaceans which include prawns, crab, shellfish whereas some are allergic to meat, peanuts, milk or even to coloured compounds which give colour to vegetables. There can be many forms of allergies and the reaction that body produces with exposure to allergen in any form is called allergic reaction. This can be dust allergy, skin allergy or food allergy.
Most food allergies develop during childhood, but a few to as fish, crab, shellfish, or nuts may appear little later in life. Crabs along with shrimps, lobsters and shellfish are termed under crustaceans and food allergy to crustacean may lead to dangerous reactions often occurring in anaphylaxis. Triggering off an adverse reaction by the body’s immune system to crab or food containing crabs is called as crab allergy. The main allergenic compounds present in crab or all crustacean groups are tryptomysin so one should be careful enough in choosing food containing tryptomysin not only in crabs but any other seafood dishes containing crabs. Crabs can be eaten cooked or in any other forms as crabsticks, surimi or Spanish Pella.
Food allergy from crab can vary from individual to individual, while in some cases the component in crab may not be life threatening but to unlucky few ,even a taste of problem food can lead to severe effects. Symptoms from food allergy crab may appear almost immediately or at any time within two hours. Tingling of lips or mouth may be the first symptoms, but very soon one may develop hives, swelling involving lung, mouth or elsewhere itchiness, runny nose, eczema or more severe a lump in the throat, asthma or state of Anaphylactic shock. Though these are the list of only possible signs of food allergy crab but only adequate diagnosis can rule out possibility of crab allergy.
To rule out the symptoms from crab allergy one must visit an allergy consultant and diagnosis should be done at earliest. This may include certain Blood test, skin test, or elimination of problem food for a while till allergy reappears. Since allergies are hereditary a physical examination is a must to work on the symptoms and confirm the severity.
More and more food allergies are been able to discover due to new technologies in medical science. Once a person comes to know about the food allergy, the best is to avoid the foods that may cause allergic reaction. It is equally important to read instructions on food labels in order to know exact food components present so as to avoid any food allergies.
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