St Petersburg, Missouri From Chapter 1 of The Adventures of Tom Sawyer, where Tom and Huck first meet: The summer evenings were long. It was not dark, yet. Presently Tom checked his whistle. A stranger was before him -- a boy a shade larger than himself. A new-comer of any age or either sex was an impressive curiosity in the poor little shabby village of St. Petersburg.
Shellfish allergy is an abnormal response by the body's immune system to proteins in certain marine animals. Shellfish include marine animals with shells, such as shrimp, crab, oysters and lobster, as well as octopus, squid and scallops. Some people with shellfish allergy react to all shellfish; others react to only certain kinds. Reactions range from mild symptoms â such as hives or a stuffy nose â to severe and even life-threatening. If you think you have a shellfish allergy, talk to your doctor.
There are two kinds of shellfish: crustacea (such as shrimp, crab and lobster) and mollusks (such as clams, mussels, oysters and scallops). Reactions to crustacean shellfish tend to be particularly severe. If you are allergic to one group of shellfish, you might be able to eat some varieties from the other group.