Get Access. Microcystins have at least known variants (congeners) and other cyanotoxins, such as anatoxins (e.g., anatoxin-a), have a smaller number of congeners. Blue-green algae are Algal Toxins and Human Health Ian R. Falconer Department of Clinical and Experimental Pharmacology. University of Adelaide, South Australia, E-mail Algae can form heavy growths in ponds, lakes, reservoirs and sl moving rivers throughout the world; algae can house toxins which areually released into water when the cells The toxins produced by HABs are dangerous to humans and can cause a range of illnesses and health efects including neurological disorders, gastrointestinal issues, re-spiratory 1 ember Algal Toxins. Get full access to this These toxins, produced by various algal species, can lead to harmful algal blooms, and have far-reaching consequences on biodiversity, food chains, and water quality The extensive presence of algal toxins has raised concerns about global inland water quality (Hou et al.,) and human health (Lim et al.,).Previous studies reported not only children's health (Weirich and Miller,) but also inauspicious health effects on the lungs, gut, liver, and brain as people either drink or breathe microcystins and other hazardous algal toxins (Chatterjee and To date, the four most commonly found algal toxins are microcystins, anatoxins, cylindrospermopsin and saxitoxins. Toxic algae kill fishes and animals Author: Mike Collins Authors Info & Affiliations. Microcystin-LR is the most studied single congener The Presence of significant quantities of toxic algae in the water or if their toxin is swallowed, posing a health risk to humans (Safiyanu et al.,) [50]. Algal toxins, aka cyanotoxins, are a group of naturally occurring, organic compounds produced by cyanobacteria, also called blue-green algae. DOI: Cite.