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In this study, genotoxic potential of metronidazole, an antibiotic-antiparasitic agent widely used both clinical and veterinary areas, was evaluated using the piscine micronucleus test. Specimens of Oreochromis niloticus (Pisces: Cichlidae) were exposed to different concentrations (5, 10, 15mg/L) of metronidazole and 4mg/L cyclophosphamide (as positive control) for 24, 48 and 72h. A fluorescent staining...
In this study, cyto-genotoxic effects of a textile mill effluent on fish Oreochromis niloticus were investigated using the micronucleus (MN) test and methods to analyze interphase silver-stained nucleolar organizer regions (AgNORs). Fishes were exposed to three different concentrations of textile mill effluent (5, 10 and 20%(v/v)) for 3, 6 and 9 days. Cyclophosphamide (2mg/l) was used as a positive...
Micronucleus formation in fish erythrocytes, as an indicator of chromosomal damage, has been increasingly used to detect the genotoxic potential of environmental contaminants. Nucleolar organizer regions (NORs) stained with colloidal silver techniques indicate sites of active RNA transcription. The number and size of NORs in interphase nuclei reflect cellular activities such as proliferation and differentiation...
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