Nation Algae toxin may be causing Alzheimer’s in dolphins. Illness could signal risks for humans March 29, 2019Jim Waymer, Florida TodayComments Off on Algae toxin may be causing Alzheimer’s in dolphins. Illness could signal risks for humans A common algae toxin, worsened by increased temperatures, may be causing Alzheimer's disease in dolphins, hinting at similar health risks for humans.