Phylogenetic group distribution and antibiotic resistance of Escherichia coli isolates in aquatic environments of a highly populated area.

Autor: Mansour R; Department of Biological Sciences, Faculty of Sciences, Beirut Arab University, P.O. Box 11-5020, Riad El Solh 11072809, Beirut, Lebanon., El-Dakdouki MH; Department of Chemistry, Faculty of Sciences, Beirut Arab University, P.O. Box 11-5020, Riad El Solh 11072809, Beirut, Lebanon., Mina S; Department of Medical Laboratory Sciences, Faculty of Health Sciences, Beirut Arab University, P.O. Box 11-5020, Riad El Solh 11072809, Beirut, Lebanon.
Jazyk: angličtina
Zdroj: AIMS microbiology [AIMS Microbiol] 2024 May 09; Vol. 10 (2), pp. 340-362. Date of Electronic Publication: 2024 May 09 (Print Publication: 2024).
DOI: 10.3934/microbiol.2024018
Abstrakt: Background: Extended-spectrum beta-lactamase (ESBL)-producing Enterobacteriaceae including Escherichia coli ( E. coli ), are recognized as a global public health threat due to their multidrug-resistant (MDR) phenotypes and their rapid dissemination in aquatic environments. Nevertheless, studies investigating the prevalence and antimicrobial resistance (AMR) profile of ESBL-producing E. coli in Lebanese surface water are limited.
Objective: This study aimed to assess the physicochemical properties and microbial contamination load and to determine the distribution of AMR patterns of ESBL-producing E. coli in surface water samples from different sites in the North Governorate of Lebanon.
Methods: Water samples were collected from 25 major sites in North Lebanon. These samples were analyzed for the presence of total coliforms, E. coli , and fecal enterococci. Phenotypic and genetic characterizations were then performed for E. coli isolates to determine their resistance patterns and phylogenetic groups.
Results: Fifty-six samples out of 100 samples were positive for ESBL-producing E. coli , mostly harboring bla CTX-M (40/56, 71%) including bla CTX-M-15 (33/40, 82%), bla TEM gene (36/56, 64%), bla SHV (20/56, 36%), and bla OXA (16/56, 29%) including bla OXA-48 gene (11/16, 69%). Most ESBL-producing E. coli isolates belonged to the extra-intestinal pathogenic phylogroup B2 (40/56, 71.4%) while 10/56 (17.9%) belonged to the commensal phylogroup A.
Conclusion: Our results highlight the need to implement effective water monitoring strategies to control transmission of ESBL-producing E. coli in surface water and thus reduce the burden on human and animal health.
Competing Interests: Conflict of interest: The authors declare no conflict of interest in this work.
(© 2024 the Author(s), licensee AIMS Press.)
Databáze: MEDLINE