| toxicity of microcystis species isolated from natural blooms and purification of the toxin. | microcystis strains (2 toxic and 18 nontoxic to mice) were isolated from toxic waterblooms that had been collected from lake kasumigaura, ibaraki prefecture, japan, in august 1985. thirteen of the strains (2 toxic and 11 nontoxic) were microcystis aeruginosa, 2 (nontoxic) were microcystis wesenbergii, and the other 5 were difficult to identify. six (1 toxic and 4 nontoxic m. aeruginosa and 1 m. wesenbergii) of these 20 strains were established as axenic cultures. a toxic and axenic strain of m. ... | 1989 | 2515803 |