Demonstration of an optical biosensor for the detection of faecal indicator bacteria in freshwater and coastal bathing areas
| Autor: | Brendan Heery, Gillian Duffy, Dermot Brabazon, Fiona Regan, Ciprian Briciu-Burghina |
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| Rok vydání: | 2019 |
| Předmět: |
Optics and Photonics
Veterinary medicine Bathing biology Faecal indicator Fresh Water Biosensing Techniques Optical biosensor biology.organism_classification Biochemistry Analytical Chemistry Feces Escherichia coli detection Escherichia coli Environmental science Seawater Sample collection Water Microbiology Fluorogenic Substrate Biomarkers Bacteria Glucuronidase |
| Zdroj: | Analytical and Bioanalytical Chemistry. 411:7637-7643 |
| ISSN: | 1618-2650 1618-2642 |
| DOI: | 10.1007/s00216-019-02182-6 |
| Popis: | ColiSense, an early warning system developed for Escherichia coli detection, is assessed using environmental samples. The system relies on the detection of β-glucuronidase (GUS), a biomarker enzyme for E. coli. In contrast with other rapid GUS-based methods, ColiSense is the only method that uses 6-chloro-4-methyl-umbelliferyl-β-d-glucuronide (6-CMUG) as a fluorogenic substrate. The system measures a direct kinetic response of extracted GUS, and the detection was carried out in the absence of particles or bacteria. It is necessary to evaluate the system with environmental samples to establish the relationship between faecal indicator bacteria E. coli and the response measured by the ColiSense. This paper presents the results of tests carried out with the ColiSense system for 2 trials, one conducted with freshwater samples collected from rivers in the Dublin area and a second conducted with seawater samples from coastal areas collected over the bathing season. A positive linear correlation was found between E. coli (MPN 100 mL−1) and ColiSense response (R2 = 0.85, N = 125, p |
| Databáze: | OpenAIRE |
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