The characterization of Enterobacteriaceae and Pseudomonadaceae isolated from natural salt licks in Sarawak Borneo

Lihan, S. and Jalin, F.J.E. and Mohd-Azlan, J. and Chiew, S.T. and Chai, L.C. (2022) The characterization of Enterobacteriaceae and Pseudomonadaceae isolated from natural salt licks in Sarawak Borneo. Food Research, 6 (3). 350 – 359. ISSN 2550-2166, DOI https://doi.org/10.26656/fr.2017.6(3).208.

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Abstract

Salt lick sites are popular hot spots for hunting among the rural community because many animals are attracted to the sites for mineral licking. The animals roaming freely within the salt lick sites may contribute to the transmission of bacterial pathogens, especially through faecal contamination of the salt lick environments. This study aimed to isolate, identify and characterise bacteria from water and soil of salt lick sites and to determine if there is evidence of the transmission of bacteria between two salt lick sites located within the vicinity of Semait river in the NCR (native customary rights) land area of Long Selaan village, Upper Baram in Malaysian Borneo. Samples of soil (n = 8) and water (n = 7) from the two salt lick sites were collected and plated on Eosine Methylene Blue Agar (EMBA) and MacConkey agar for the isolation of bacteria. Fifteen bacterial colonies were isolated and identified by Matrix-assisted laser desorption ionization time-of-flight mass spectrophotometry (MALDI-TOF-MS), 16S rRNA and API® 20E kit. The bacterial isolates were subjected to (GTG)5-PCR and antimicrobial analyses. The antibiotics used were Ampicillin (AMP), Tobramycin (TOB), Imipenem (IPM), Amikacin (AK), Trimethoprim-sulfamethoxazole (SXT), Tetracycline (TE), Chloramphenicol (C), Ceftazidime (CAZ), Nitrofurantoin (F) and Norfloxacin (NOR). The result of this study shows the presence of two families of bacteria in the salt lick samples which were Enterobacteriaceae and Pseudomonadaceae. The dendrogram plotted based on (GTG)5-PCR shows a close genetic relatedness among the bacteria from water and soil as well as in between and within the two salt lick sites. The resistance index of the bacteria from the salt licks ranged from 0.0 to 0.6. This study suggests the potential risk of antimicrobial-resistant bacteria with diverse transmission pathways associated with the salt licks within the area. © 2022 The Authors. Published by Rynnye Lyan Resources.

Item Type: Article
Funders: Institute of Biodiversity and Environmental Conservation, Tun Zaidi Chair [Grant No; F07/TZC/1915/2019], UNIMAS Dayak Chair, Universiti Malaysia Sarawak
Uncontrolled Keywords: Amikacin; Ampicillin; Ceftazidime; Chloramphenicol; Cotrimoxazole; Imipenem; Nitrofurantoin; Norfloxacin; RNA 16S; Tetracycline; Tobramycin; Water; Agar gel electrophoresis; Antibiotic resistance; Antibiotic sensitivity; Article; Bacterial growth; Bacterium colony; Bacterium isolate; Bacterium isolation; Borneo; DNA extraction; Enterobacter asburiae; Enterobacter cloacae; Enterobacteriaceae; Escherichia coli; Klebsiella oxytoca; Nonhuman; phylogenetic tree; Pseudomonadaceae; Pseudomonas; Pseudomonas azotoformans; Pseudomonas monteilii; Pseudomonas putida; Quality control; Salt intake; Zone of inhibition
Subjects: Q Science > Q Science (General)
Divisions: Faculty of Science > Institute of Biological Sciences
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 26 Oct 2023 03:24
Last Modified: 26 Oct 2023 03:46
URI: http://eprints.um.edu.my/id/eprint/43617

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