Screening and characterisation of two Pseudomonas aeruginosa from aquaculture and water environment

Seng Chiew Toh; Samuel Lihan; Khar Mun Soh; Natalia Uyub; Lay Ching Chai; Moritz Mü; Ller

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Screening and characterisation of two Pseudomonas aeruginosa from aquaculture and water environment

Author: Seng Chiew Toh ¹ ; Samuel Lihan ¹ ; Khar Mun Soh ¹ ; Natalia Uyub ¹ ; Lay Ching Chai ² ; Moritz Mü ; ller ^{3
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Author Information

1. Department of Molecular Biology, Faculty of Resource Science and Technology, Universiti Malaysia Sarawak
2. Institute of Biological Sciences, Faculty of Science, Universiti Malaya
3. Faculty of Engineering, Computing and Science
4. Swinburne University of Technology
Publication Type:Journal Article
Keywords: P. aeruginosa; antibiotic susceptibilities; 16S rRNA gene sequencing; aquaculture
From:Malaysian Journal of Microbiology 2018;14(4):329-334
CountryMalaysia
Language:English
Abstract: Aims:Pseudomonas has been associated with diseases occurring in people with weakened or compromised immune system after exposure to contaminated water. The diseases are commonly treated with antibiotics. However, the bacteria had developed resistances to commonly used antibiotics making treatment a difficult task. Therefore, the continuous surveillance of susceptibility of Pseudomonas especially for the human pathogen P. aeruginosa to commonly clinical and aquaculture farming used antibiotics is important to ensure that serious infections remain susceptible to those antibiotics.
Methodology and results:In this study, the bacteria were screened from water, sediment and fish from rivers and aquaculture farms around Kuching, Sarawak. A total number of 38 presumptive P. aeruginosa were isolated using CHROMagar TM Pseudomonas and subjected to a series of biochemical tests. Out of all the isolates tested, only two isolates designated as AS-R10(S) and BK2-OLT2(S) fulfilled the biochemical characteristics of P. aeruginosa. 16S rRNA gene sequencing further confirmed these two isolates as P. aeruginosa based on their 100% similarity with P. aeruginosa strain GD1 and P. aeruginosa strain PA1201 in NCBI database. These two isolates were tested for their susceptibilities against nine common antibiotics used in both clinical and aquaculture farming nowadays: imipenem, piperacillin, meropenem, amikacin, gentamicin, ciprofloxacin, ceftazidime, tobramycin and norfloxacin according to CLSI standard using disk diffusion method.
Conclusion, significance and impact of study:The two isolates exhibited total susceptibility to all the antibiotics analysed, suggesting the effectiveness of the antimicrobial agents towards P. aeruginosa isolated from aquaculture and water environment in the study area.
Full text:20.2018my0460.pdf