Human Illness Associated with Harmful Algae - Discusses the various fish and shellfish toxicities of humans caused by the animal's ingestion of toxic algae. CDC: Ciguatera Fish Poisoning - Includes factsheet and publications. Harmful Algal Blooms and Biotoxins - Factsheet on algal blooms and their effects on humans through affected fish and shellfish. Ricin Toxin from the Castor Bean Plant - Scientific and medical article on the toxin and its effects. AmericanMushrooms.com: The Death Cap Mushroom (Amanita phalloides) - Images, description, related mushrooms, and discussion of toxicity. American.edu: Blowfish and Trade - Outline and overview of this subject. eMedicine - Toxicity, Tetrodotoxin - Article by Theodore Benzer, MD, PhD. eMedicine - Toxicity, Mushrooms - Article by Mary E Cataletto, MD. Bad Bug Book: Tetrodotoxin - Pufferfish or Fugu poisoning. Includes cause, symptoms, prognosis, and outbreaks. Bad Bug Book: Various Shellfish-Associated Toxins - Caused by consuming shellfish that have accumulated dinoflagellate toxins. Features cause, symptoms, associated foods, and outbreaks. Bad Bug Book: Mushroom Toxins - Includes toxic substances and their effects, symptoms, diagnosis, descriptions of some poisonous mushrooms, and outbreaks. Bad Bug Book: Scombrotoxin - Caused by the ingestion of foods that contain high levels of histamine. Includes cause, symptoms, associated foods, and outbreaks. Bad Bug Book: Ciguatera Fish Poisoning - Caused by the consumption of subtropical and tropical marine finfish which have accumulated naturally occurring dinoflagellate toxins through their diet. Includes cause, associated fish, symptoms, and outbreaks. The Merck Manual: Poisoning - Causes, symptoms, and signs of poisoning caused by eating plants or animals that contain a naturally occurring poison. eMedicine Health - Ricin - Consumer health resource center providing information on the symptoms and treatment of ricin poisoning. Food Safety Research Information Office: Ciguatoxin - Directory of factsheets, reports, press releases, and resources on the toxin. CDC: Harmful Algal Blooms - Discusses the causes, symptoms, and prevention of several toxins carried by fish and shellfish.