Leong, Sui Sien and Samuel, Lihan and Toh, Seng Chiew (2022) Prevalence of chloramphenicol-resistant gene in Escherichia coli from water sources in aquaculture farms and rivers of Kuching, Northwestern Borneo. Fisheries and Aquatic Sciences, 25 (4). pp. 202-213. ISSN 2234-1757
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Abstract
Antibiotic resistant Escherichia coli cases are increasing high especially in Southeast Asia. Illegal use of the antibiotic in the aquaculture farming may become the culprit of the outbreak and spread into environmental source. A study was conducted to: 1) detect the chloramphenicol (CAL)-resistant gene in E. coli isolated from three aquaculture farms and six rivers of northwestern Borneo and 2) investigate the correlation between cat gene with five common antibiotics used. Isolation of E. coli was done on Eosin methylene blue agar and characterized using indole, methyl red, Voges-Proskauer, citrate tests. E. coli isolates were subsequently tested for their susceptibility to five antibiotics commonly used in aqua-farming. The CAL-resistant E. coli were further analyzed for the presence of resistant genes (cat I, cat II, cat III, cat IV) using multiplex polymerase chain reaction. 42 bacterial colonies were isolated from a total of 80 individual water samples, 34 of which were identified as E. coli. Result showed 85.3% of the E. coli isolates were resistant to amoxicillin, 35.3% were resistant to tetracycline, 29.4% were resistant to CAL, 17.6% were resistant to nitrofurantoin and 8.8% were resistant to nalidixic acid. All of the 10 CAL resistant E. coli isolateswere detected with cat II genes; five isolates detected with cat IV genes; three isolates detected with cat III genes; and another two detected with cat I genes. Pearson correlation coefficient shows highly significant relationship between resistance pattern of CAL with amoxicillin; and CAL with tetracycline. Our findings provide the supplementary information of the CAL resistance gene distribution, thereby improving our understanding of the potential risk of antibiotic resistance underlying within this microbial ecosystem.
Item Type: | Article |
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Additional Information: | Biodiversity and Environmental Conservation |
Uncontrolled Keywords: | Chloramphenicol, cat genes, Escherichia coli, Aquaculture farms, Rivers. |
Subjects: | Q Science > Q Science (General) Q Science > QR Microbiology |
Divisions: | Academic Faculties, Institutes and Centres > Institute of Biodiversity and Environmental Conservation Faculties, Institutes, Centres > Institute of Biodiversity and Environmental Conservation |
Depositing User: | Lihan |
Date Deposited: | 09 Aug 2022 06:21 |
Last Modified: | 30 Mar 2023 02:23 |
URI: | http://ir.unimas.my/id/eprint/39152 |
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