Characterization of cyanobacteria microcystins (cyanotoxins) blooming in the Dams of Northern Morocco

Mustapha Ouhsassi, E. Khay, A. E. Laghdach, F. Abdelouahab, Abdeltif El Ouahrani, M. Idaomar, J. Abrini
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引用次数: 1

Abstract

Cyanobacteria thrive in eutrophic freshwaters and impose a serious problem for the management of water bodies. Some Cyanobacteria species impose even a risk for public health due to the production of intracellular toxins. This study is a qualitative approach to determine the degree of toxicity and the toxicological aspect of cyanotoxins in order to setup a monitoring program for cyanobacteria blooms and the management of cyanotoxins thriving in three water bodies in Northern Morocco. Water samples were collected from three major water reservoirs/dams near the city of Tetouan (SMIR, BELMEHDI and NAKHLA). These water samples were screened for possible Cyanobacteria using specific culture media (BG13 & Z8). Three cyanobacteria species (Microcystis aeruginosa, Pseudanabaena galeata and Oscillatoria tenuis) were isolated, purified and lyophilized. Using gas chromatography coupled with mass spectrometry, nine types of microcystins were characterized namely: (MC-LR); (MC-YR); (MC-LA); (MC-FR); (MC-RF), [Mser7]MC-LR; [Dha7]MC-LR; MC-YAba; and [Mser7]MC-YR. Our results strongly recommend and urge different stakeholders to consider the various health risks potentially generated by these toxins during water use and management. In addition, this study is a contribution to raise awareness of the toxicological aspect of the cyanobacteria inhabiting the water bodies of Northern Morocco.   Key words: Blue algae, gas chromatography coupled to mass spectrum, bio-toxins, water dam.
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表征的蓝藻微囊藻毒素(蓝藻毒素)盛开在大坝摩洛哥北部
蓝藻在富营养化淡水中茁壮成长,给水体管理带来了严重的问题。由于产生细胞内毒素,一些蓝藻物种甚至对公众健康构成风险。本研究是一种定性的方法来确定毒性程度和蓝藻毒素的毒理学方面,以便建立一个监测方案蓝藻华和管理蓝藻毒素蓬勃发展在摩洛哥北部的三个水体。从得土安市附近的三个主要水库/水坝(SMIR、BELMEHDI和NAKHLA)收集了水样。这些水样使用特定培养基(BG13和Z8)筛选可能的蓝藻。对铜绿微囊藻(Microcystis aeruginosa)、galeata假蓝藻(Pseudanabaena galeata)和柔弱振荡菌(Oscillatoria tenuis)进行了分离纯化和冻干。采用气相色谱-质谱联用技术对9种微囊藻毒素进行了表征,分别为:(MC-LR);(MC-YR);(MC-LA);(MC-FR);(MC-RF), [Mser7] MC-LR;[Dha7] MC-LR;MC-YAba;和[Mser7] MC-YR。我们的研究结果强烈建议并敦促不同的利益相关者考虑在用水和管理过程中这些毒素可能产生的各种健康风险。此外,这项研究是一个贡献,以提高认识的毒理学方面的蓝藻居住的水体摩洛哥北部。关键词:蓝藻;气相色谱-质谱耦合;生物毒素;
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