There are four syndromes called shellfish poisoning', which share some common features and are primarily associated with bivalve molluscs (such as mussels, clams, oysters and scallops). These shellfish are filter feeders and, therefore, accumulate toxins produced by microscopic algae in the form of dinoflagellates and diatoms. Orders Subclass Protobranchia Solemyoida Nuculoida Subclass Pteriomorphia - oysters, mussels Arcoida Mytiloida Pterioida Subclass Paleoheterodonta Trigoinoida Unionoida - freshwater mussels Subclass Heterodonta - clams, zebra mussels Veneroida Myoida Subclass Anomalosdesmata Pholadomyoida Bivalves are molluscs belonging to the class Bivalvia. ... Subclasses Heterodonta Palaeoheterodonta A mussel is a bivalve mollusk that can be found in lakes, rivers, creeks, intertidal areas, and throughout the ocean. ... Maxima clam (Tridacna maxima) Clams are shelled marine or freshwater mollusks belonging to the class Bivalvia. ... Crassostrea gigas, Marennes-Oléron Crassostrea gigas, Marennes-Oléron Crassostrea gigas, Marennes-Oléron, opened The name oyster is used for a number of different groups of molluscs which grow for the most part in marine or brackish water. ... Genera See text. ... Filter feeders (also known as suspension feeders) are animals that feed by straining suspended matter and food particles from water, typically by passing the water over a specialized structure, such as the baleen of baleen whales. ... The venom of the black widow spider is a potent latrotoxin. ... A seaweed (Laurencia) up close: the branches are multicellular and only about 1 mm thick. ... Classes Dinophyceae Noctiluciphyceae Syndiniophyceae The dinoflagellates are a large group of flagellate protists. ... Diatoms (Gr. ...

The syndromes are:

• Paralytic shellfish poisoning (PSP)
• Neurologic shellfish poisoning (NSP)
• Diarrheal shellfish poisoning (DSP)
• Amnesic shellfish poisoning (ASP)

4 distinct shellfish-poisoning syndromes have been identified: Paralytic shellfish poisoning (PSP) Neurologic shellfish poisoning (NSP) Diarrheal shellfish poisoning (DSP) Amnestic shellfish poisoning (ASP) All 4 syndromes share some common features and primarily are associated with bivalve mollusks (eg, mussels, clams, oysters, scallops). ... Amnesic shellfish poisoning (ASP) is one of the four recognised syndromes of shellfish poisoning (the others being neurologic shellfish poisoning, diarrheal shellfish poisoning and paralytic shellfish poisoning). ...

External links

• Human Illness Associated with Harmful Algae