The onset of gastrointestinal symptoms begins within 24 hours of ingestion, and neurological symptoms occur within 48 hours. In many cases, recovery from ASP is never complete, because many victims suffer short-term memory loss. It has been found to be associated with shellfish harvested along Florida and in the Gulf of Mexico. There is no antidote, but recovery normally occurs within hours to several days of onset with few aftereffects. Onset is rapid, occurring within minutes to a few hours after ingestion.
Cyanobacterial poisoning is caused by a variety of toxins, including microcystins and anatoxins.
They are produced by different species of cyanobacteria, including Anabaena sp. There are no known antidotes for cyanobacterial poisoning.