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- W2432748578 abstract "Background: In the last years, the toxicity of the waters due to the presence of antibiotics is well studied. Introduction: The Microtox test, based on the measurement of bioluminescence from the bacterium Vibrio fischeri, was applied on samples of river water spiked with several antibiotics to assess acute toxicity. Thirteen antibiotics, presenting different mechanism of action, were selected as the most widely used in anti-infective therapy. Method: Toxicity was evaluated for drug concentrations distributed on six levels ranging from 1.0 - 50.0 μg/ml on one-component solutions and real samples spiked with drug mixtures. Bioluminescence was measured after half-hour and 24 h of incubation. The results were reported as no observable effect concentration, lowest observable effect concentration or half-effective concentration. The light output from the test samples was compared to that of a standard phenol solution as a control. Results: Chlortetracycline, Oxytetracycline, Ofloxacin, Norfloxacin, Oxolinic Acid, Nalidixic Acid and Streptomycin were found to be very toxic after just 30 min of incubation at low concentration levels. Clindamycin, Neomycin, Ampicillin and Amoxicillin induced bioluminescence decrease but below the toxicity limits permitted by law. In contrast, Erythromycin and Sulphamethoxazole showed hormesis, a phenomenon increasing bioluminescence. The mixtures of antibiotics showed toxicity amplified with additive or synergic activity. Conclusion: The bioluminescence test was proved to be effective in measuring toxicity of drugs in environmental waters, highlighting also the difficulties in predicting the toxicity in presence of several drugs or other pollutants. Keywords: Antibiotics, bioluminescence, drugs toxicity, microtox test, water pollution." @default.
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- W2432748578 date "2016-05-27" @default.
- W2432748578 modified "2023-10-04" @default.
- W2432748578 title "Acute Toxicity of Antibiotics in Surface Waters by Bioluminescence Test" @default.
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- W2432748578 doi "https://doi.org/10.2174/1573412912666151110204041" @default.
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