Occurrence of Microcystis aeruginosa and microcystins in Rio de la Plata river (Argentina)
Acta toxicol. argent
;
15(1): 8-14, jul. 2007. ilus, tab
Artigo
em Inglês
| LILACS
| ID: lil-564848
ABSTRACT
This paper is the first report on microcystins producer blooms of Microcystis aeruginosa in the Argentinean coast of the R¨ªo de la Plata river, the most important drinkingwater supply of Argentina. The distribution of toxic cyanobacterium Microcystis cf. aeruginosa blooms in the Argentinean coast of the Rio de la Plata river was studied from December 2003 and January 2006. Microcystis aeruginosa persisted in the river with values ranged between 0 -7.8 104 cells ml-1. Samples of two Microcystis aeruginosa water blooms were collected at La Plata river and were analyzed by the mouse bioassay and by high-performance liquid chromatography with Diode-array and MS detector. The samples showed high hepatotoxicityin mouse bioassay and, in accordance, important amount of microcystins. The bloom samples contained microcystins LR and a variant of microcystin with a molecular ion [M+H]+= 1037.8 m/z as major components. The total toxin content found in these samples was 0.94¦Ìg/mg and 0.69¦Ìg/mg of lyophilised cells. We conclude that the presence of toxic clones of Microcystisaeruginosa in the Argentinean coast of the Rio de la Plata is an actual sanitary and environmental problem and that further studies are necessary to make the risk assessment.
Texto completo:
DisponíveL
Índice:
LILACS (Américas)
Assunto principal:
Toxinas Bacterianas
/
Microbiologia da Água
/
Cianobactérias
/
Microcistinas
Tipo de estudo:
Fatores de risco
Limite:
Animais
País/Região como assunto:
América do Sul
/
Argentina
Idioma:
Inglês
Revista:
Acta toxicol. argent
Assunto da revista:
Saúde Pública
/
Toxicologia
Ano de publicação:
2007
Tipo de documento:
Artigo
País de afiliação:
Argentina
/
Portugal
/
Espanha
Instituição/País de afiliação:
Hospital General San Martin/AR
/
IIQAB-CSIC/ES
/
Instituto Nacional de Saude Dr. Ricardo Jorge/PT
/
Museo de La Plata/AR
/
Universidad Nacional de La Plata/AR
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