Beginning of Essay
Shellfish are very poisonous to humans. There poisoning is caused by a group of toxins elaborated by plank tonic algae which the shellfish feed on. The toxins are accumulated and sometimes metabolized by the shellfish. The 20 toxins responsible for paralytic s (PS ....

Middle of Essay
.... drowsiness, incoherent speech, and respiratory paralysis. Less wellcharacterized are the symptoms associated with DSP, NSP, and ASP. DSP is primarily observed as a generally mild gastrointestinal disorder, i.e., nausea, vomiting, diarrhea, and abdominal pain accompanied by chills, headache, and fever. Both gastrointestinal and neurological symptoms characterize NSP, including tingling and numbness of lips, tongue, and throat, muscular aches, dizziness, reversal of the sensations of hot and cold, diarrhea, and vomiting. ASP is characterized by gastrointestinal disorders (vomiting, diarrhea, abdominal pain) and neurological problems (confusion, memory ....