title: Evaluation of the genotoxic potential of municipal waste water discharged into the Paraguay River during periods of flood and drought.
abstract: The cytogenotoxic effects of the waste water from Corumbá and of the water of the Paraguay River, where this sewer discharges, were evaluated in flood and drought seasons. Allium cepa root meristems were exposed to 20 and 72 h treatments. Mitotic index, frequency, and types of aberrant cells were compared to the control. The waste water was genotoxic to this organism. The cycle of flood and drought influenced the levels of genotoxicity observed with the river water.
authors.affiliation: Department of Sciences of the Environment, University Centre of Corumbá, Federal University of South Mato Grosso, Brazil.
authors.forename: D S
authors.initials: DS
authors.lastname: de Lima Moraes
authors.forename: B Q
authors.initials: BQ
authors.lastname: Jordão
mesh_terms: D001938:Brazil; D002869:Chromosome Aberrations; D025063:Chromosome Disorders; D004190:Disasters; D004784:Environmental Monitoring; D005618:Fresh Water; D006801:Humans; D008940:Mitotic Index; D009152:Mutagenicity Tests; D019697:Onions / Q000187:drug effects*; D012722:Sewage; D014873:Water Pollutants / Q000633:toxicity*
chemical_list: D012722:Sewage; D014873:Water Pollutants