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In cyanobacteria, the cell division cycle, the process through which one cell grows and divides into two new cells, acts as the 'carrier signal'.

Blue-green algae, technically known as cyanobacteria, is a collection of microscopic organisms that are naturally present in lakes and streams.

The blue-green algae, known as cyanobacteria, is a natural part of the ecosystem but can rapidly grow under certain conditions, including warm temperatures and calm water.

Campaigners fear that breaches of trade effluent consents, sewage spills and agricultural pollution are combining to fuel the growth of toxic cyanobacteria at Lough Neagh.

The bloom may be comprised of blue-green algae, or cyanobacteria, which produce microcystin, “a potent toxin that can irritate the skin and cause liver and kidney damage,” the National Aeronautics and Space Administration wrote.