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Genotoxicity of 5-fluorouracil (5-FU), etoposide (ET) and cadmium chloride (CdCl 2 ) was evaluated in  Limnodrilus udekemianus , cosmopolitan tubificid species, by alkaline single-cell gel electrophoresis (comet assay). Groups of 50 individuals were exposed in vivo in water-only short-term (96 h) tests to 5-FU (0.004, 0.04, 0.4, 4 and 40 μM), ET (0.004. 0.04, 0.4 and 4 μM) and CdCl 2  (0.004, 0.04, 0.4, 4 and 40 μM). Mortality of worms was observed only for CdCl 2  (4 and 40 μM). Cell viability lower than 70 % was detected for 5-FU (0.4, 4 and 40 μM), ET (4 μM) and CdCl 2  (0.4 and 4 μM). All tested substances induced significant increase of DNA damage except 0.004 μM of ET.  L. udekemianus  being sensitive to all tested substances indicates that it can be used in ecogenotoxicology studies. Concern should be raised to cytostatics, especially to 5-FU, since concentration of 0.004 μM induced DNA damage is similar to ones detected in wastewaters.

Effects of 5-Fluorouracil, Etoposide and CdCl2 in Aquatic Oligochaeta Limnodrilus udekemianus Claparede (Tubificidae) Measured by Comet Assay