KWR Anthony Verschoor by KWR Anthony Verschoor
08 June 2018

New cyanobacterial toxins

New cyanobacterial toxins Cyanobacteria (“blue-green algae”) are notorious for the production of toxins such as microcystins (MCs). Less known is that they also produce other toxic or otherwise bioactive peptides (TBPs). This research found that TBPs often co-occur with MCs, also at locations designated for drinking intake. Although some TBPs may be even more toxic than MCs, TBPs are not included in current monitoring schemes, making them a hidden risk....

Analysis of cyanobacterial metabolites in surface and raw drinking waters reveals more than microcystin

Source:Water Research, Volume 140 Author(s): Lucas J. Beversdorf, Kayla Rude, Chelsea A. Weirich, Sarah L. Bartlett, Mary Seaman, Christine Kozik, Peter Biese, Timothy Gosz, Michael Suha, Christopher Stempa, Christopher Shaw, Curtis Hedman, Joseph J. Piatt, Todd R. Miller Freshwater cyanobacterial blooms are becoming increasingly problematic in regions that rely on surface waters for drinking water production. Microcystins (MCs) are toxic peptides produced by multiple cyanobacterial genera with a global occurrence. Cyanobacteria also produce a variety of other toxic and/or otherwise bioactive peptides (TBPs) that have gained less attention including cyanopeptolins (Cpts), anabaenopeptins (Apts), and microginins (Mgn). In this study, we compared temporal and spatial trends of four MCs (MCLR, MCRR, MCYR, MCLA), three Cpts (Cpt1020, Cpt1041, Cpt1007), two Apts (AptF, AptB), and Mgn690 in raw drinking water and at six surface water locations above these drinking water intakes in a eutrophic lake. All four MC congeners and five of six TBPs were detected in lake and raw drinking water. Across all samples, MCLR was the most frequently detected metabolite (100% of samples) followed by MCRR (97%) > Cpt1007 (74%) > MCYR (69%) > AptF (67%) > MCLA (61%) > AptB (54%) > Mgn690 (29%) and Cpt1041 (15%). Mean concentrations of MCs, Apts, and Cpts into two drinking water intakes were 3.9 ± 4.7, 0.14 ± 0.21, and 0.38 ± 0.92,...

  • ScienceDirect Publication: Water Research
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