Microbial source markers assessment in the Bogotá River basin (Colombia)

Journal of Water and Health
Camilo VenegasClaudia Campos

Abstract

The microbiological indicators traditionally used to assess fecal contamination are insufficient to identify the source. The aim of this study was to detect microbial markers to identify the source of fecal pollution in the Bogotá River (Colombia). For this, we determined non-discriminating indicators such as Escherichia coli, somatic coliphages and phages infecting strain RYC2056 of Bacteroides, and potential source tracking markers as phages infecting strains GA17, HB13, and CA8 of Bacteroides, sorbitol-fermenting bifidobacteria, and molecular markers of Bifidobacterium adolescentis, Bifiodobacterium dentium, and Bacteroidetes in raw municipal wastewaters, slaughterhouse wastewaters, and the Bogotá River. Bacteriophages infecting Bacteroides strain GA17 and the molecular markers identified the wastewater sources. In contrast, sorbitol-fermenting bifidobacteria failed regarding specificity. In the Bogotá River, phages infecting strain GA17 were detected in all samples downstream of Bogotá, whereas they should be concentrated from 1 l samples in upstream samples containing less than 10(3) E. coli/100 ml to be detected. In the river water, the fraction of positive detections of molecular markers was lower than that of phages inf...Continue Reading

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Citations

Mar 18, 2017·Letters in Applied Microbiology·B R McMinnA Korajkic
Sep 20, 2017·Microbial Biotechnology·Cristina García-AljaroJuan Jofre
Nov 25, 2018·The Science of the Total Environment·C StangeA Tiehm
May 21, 2021·Frontiers in Microbiology·Elisenda BallestéCristina García-Aljaro
Jul 3, 2021·Viruses·Daniel Toribio-AvedilloLorena Rodríguez-Rubio

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