Cytogenotoxic Damages in an Ecosystem Impacted With Urban Sewage

Authors

  • I. T. D. Cabanelas Laboratório de Genetica Humana e Mutagênese, Instituto de Biologia, Universidade Federal da Bahia (UFBA), Salvador, BA, Brazil
  • L. M. A. Moreira Departamento de Biologia Geral, Instituto de Biologia, Universidade Federal da Bahia (UFBA), Salvador, BA, Brazil

DOI:

https://doi.org/10.5132/jbse.2012.02.005

Keywords:

genotoxicity, micronuclei, nuclear abnormalities, wastewater

Abstract

The intense population growth accompanied by inadequate treatments of waste has resulted in destruction of freshwater ecosystems in urban environments. The Sapato River is an important effluent on the border of the municipalities of Lauro de Freitas and Salvador in Bahia state (Brazil). Despite the increasing flow of domestic waste, there are no toxicological data on this water resource. The aim of this study was to evaluate the cytogenotoxicity of the Sapato river water, in the vicinity of sewage, using the bioassay of micronuclei (MN) and nuclear abnormalities (NA) in tilapia nilotica (Oreochromis niloticus).The analysis was made in the region under sanitary sewage and in the springs, both in dry (November and December/2006) and rainy seasons (March and April/2007), with analysis of 3000 cells per animal (n = 10). The analysis followed literature established criteria, applying the Kruskal Wallis test. Results obtained indicated seasonal differences and a higher frequency of MN and NA at the point subjected to sanitary sewage comparated to the values of reference site. We conclude that the impacted areas already show cytogenetic damage.

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Published

20-12-2012

How to Cite

Cabanelas, I. T. D., & Moreira, L. M. A. (2012). Cytogenotoxic Damages in an Ecosystem Impacted With Urban Sewage. Ecotoxicology and Environmental Contamination, 7(2), 31–35. https://doi.org/10.5132/jbse.2012.02.005

Issue

Vol. 7 No. 2 (2012)

Section

Original Articles

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