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Toxic cyanobacteria and microcystin concentrations in a public water supply reservoir in the Brazilian Amazonia region.
Toxicon 2005; 45(7):901-9T

Abstract

Toxic cyanobacteria in public water supply reservoirs represent a serious health risk as they can release potent cyanotoxins into the water. In the present study we analyzed surface water collected from the Utinga Reservoir, the main source of drinking water for the city of Belem-PA, in order to characterize the reservoir's cyanobacterial biota and to determine the toxicity of these organisms and the concentration of microcystins in raw and treated water. The cyanobacterial biota included potentially toxic genera such as Aphanizomenon, Microcystis, Nostoc, Oscillatoria, Planktothrix and Radiocystis. Mouse bioassays revealed a 43.6% frequency of hepatotoxic strains, including 30.8% Microcystis viridis strains and 12.8% Radiocystis fernandoi strains, with the lowest LD(100) (ip) of 45 and 75 mg kg(-1) body weight, respectively. Subacute hepatotoxicity was observed for Aphanizomenon cf. gracile and Coelomoron pusillum strains. HPLC analysis confirmed the production of microcystins at maximum concentrations of 4.22 microg mg(-1) dry weight for M. viridis and 2.47 microg mg(-1) for R. fernandoi. Microcystins at concentrations of up to 1.25 microg L(-1) detected in raw water by ELISA, together with a cyanobacterial density of 20,000 cells mL(-1), represents the first report of a bloom of cyanobacteria for an Amazonian water body.

Authors+Show Affiliations

Departamento de Farmácia, Centro de Ciências da Saúde, Universidade Federal do Pará, Belém, PA, Brazil.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

15904685

Citation

Dos S Vieira, José Maria, et al. "Toxic Cyanobacteria and Microcystin Concentrations in a Public Water Supply Reservoir in the Brazilian Amazonia Region." Toxicon : Official Journal of the International Society On Toxinology, vol. 45, no. 7, 2005, pp. 901-9.
Dos S Vieira JM, de P Azevedo MT, de Oliveira Azevedo SM, et al. Toxic cyanobacteria and microcystin concentrations in a public water supply reservoir in the Brazilian Amazonia region. Toxicon. 2005;45(7):901-9.
Dos S Vieira, J. M., de P Azevedo, M. T., de Oliveira Azevedo, S. M., Honda, R. Y., & Corrêa, B. (2005). Toxic cyanobacteria and microcystin concentrations in a public water supply reservoir in the Brazilian Amazonia region. Toxicon : Official Journal of the International Society On Toxinology, 45(7), pp. 901-9.
Dos S Vieira JM, et al. Toxic Cyanobacteria and Microcystin Concentrations in a Public Water Supply Reservoir in the Brazilian Amazonia Region. Toxicon. 2005 Jun 1;45(7):901-9. PubMed PMID: 15904685.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Toxic cyanobacteria and microcystin concentrations in a public water supply reservoir in the Brazilian Amazonia region. AU - Dos S Vieira,José Maria, AU - de P Azevedo,Maria Teresa, AU - de Oliveira Azevedo,Sandra Maria Feliciano, AU - Honda,Ricardo Yukio, AU - Corrêa,Benedito, Y1 - 2005/04/14/ PY - 2004/12/15/received PY - 2005/02/16/accepted PY - 2005/5/21/pubmed PY - 2005/9/17/medline PY - 2005/5/21/entrez SP - 901 EP - 9 JF - Toxicon : official journal of the International Society on Toxinology JO - Toxicon VL - 45 IS - 7 N2 - Toxic cyanobacteria in public water supply reservoirs represent a serious health risk as they can release potent cyanotoxins into the water. In the present study we analyzed surface water collected from the Utinga Reservoir, the main source of drinking water for the city of Belem-PA, in order to characterize the reservoir's cyanobacterial biota and to determine the toxicity of these organisms and the concentration of microcystins in raw and treated water. The cyanobacterial biota included potentially toxic genera such as Aphanizomenon, Microcystis, Nostoc, Oscillatoria, Planktothrix and Radiocystis. Mouse bioassays revealed a 43.6% frequency of hepatotoxic strains, including 30.8% Microcystis viridis strains and 12.8% Radiocystis fernandoi strains, with the lowest LD(100) (ip) of 45 and 75 mg kg(-1) body weight, respectively. Subacute hepatotoxicity was observed for Aphanizomenon cf. gracile and Coelomoron pusillum strains. HPLC analysis confirmed the production of microcystins at maximum concentrations of 4.22 microg mg(-1) dry weight for M. viridis and 2.47 microg mg(-1) for R. fernandoi. Microcystins at concentrations of up to 1.25 microg L(-1) detected in raw water by ELISA, together with a cyanobacterial density of 20,000 cells mL(-1), represents the first report of a bloom of cyanobacteria for an Amazonian water body. SN - 0041-0101 UR - https://www.unboundmedicine.com/medline/citation/15904685/abstract/Toxic_cyanobacteria_and_microcystin_concentrations_in_a_public_water_supply_reservoir_in_the_Brazilian_Amazonia_region_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0041-0101(05)00060-7 DB - PRIME DP - Unbound Medicine ER -