Microcystin-LR is a toxic compound produced by cyanobacterial genera Microcystis, Anabaena, Nostoc and Plantothrix, which are part of algal blooms that appear during vegetational season due to the eutrophication. Eutrophication is often the result of anthropogenic pollution of water.

Microcystin-LR acts primarily as a hepatotoxin. Long-term exposure to MC-LR can cause chronic liver injury and death. MC-LR has toxic effect also on kidney, lungs and intestine, therefore WHO recommends rigorous monitoring of drinking water resources. WHO provisional guideline value for drinking water is 1,0 μg/L.

ELISA-VIDITEST Microcystin-LR kit is intended for the detection of microcystin in water samples.