Microcystis, Raphidiopsis raciborskii and Dolichospermum smithii, toxin producing and non-toxigenic cyanobacteria in Yezin Dam, Myanmar

Yezin Dam is a man-made reservoir located close to village in Myanmar. Its water used for irrigation, domestic purposes and as drinking many urban communities the watershed area. In recent years, increased pollution due concurrent development around dam has led quality deterioration. No detailed study on distribution of cyanobacteria toxin production been conducted so far. order provide insight into extent cyanotoxins dam, samples were collected once January 2014 isolation cyanobacterial strains eight times between March 2017 June 2018 investigation physical, chemical biological parameters. A total 99 phytoplankton taxa belonging 50 genera recorded from Dam. Microscopic examination showed that Dolichospermum sp. was dominant cyanobacterium followed by small numbers Microcystis, Raphidiopsis raciborskii all throughout sampling period. 15 isolated classified morphologically phylogenetically smithii, R. Microcystis tested microcystins (MCs), cylindrospermopsins (CYNs), saxitoxins (STXs) anatoxins (ATXs) liquid chromatography-tandem mass spectrometry (LC–MS/MS) enzyme-linked immunosorbent assay (ELISA). The analysis ELISA LC–MS did not indicate presence ATXs, STXs, CYNs nor MCs. Four five produced CYN deoxyCYN. One (AB2017/08) 22 MC congeners. Concentrations 0.12 μg L−1 0.34 MCs also found an environmental sample ELISA. potential therefore exists use untreated cause harmful effects humans, wild animals.