DNA tests can obviously be of a sensitive nature and we are more than aware of this. All our DNA sampling kits are sent out in the post in plain envelopes marked Private & Confidential and with no branding on them, so it will look like a normal letter.
Shellfish Allergy Triggers. Within the shellfish family, it is the crustacean group (shrimp, lobster and crab) that causes the greatest number of allergic reactions. Many shellfish-allergic people can tolerate mollusks (scallops, oysters, clams and mussels). Avoid foods that trigger symptoms.
Delayed allergic reaction to shell fish. Q: 10/17/2015. I have just seen a patient that developed Generalized pruritis and hives, mild lightheadedness, and feeling something wasn't right about 5 hours after eating a large amount of crab, shrimp, lobster, mussels and clams.