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Occurrence of Vibrio species, beta-lactam resistant Vibrio species, and indicator bacteria in ballast and port waters of a tropical harbor.

Publication ,  Journal Article
Ng, C; Goh, SG; Saeidi, N; Gerhard, WA; Gunsch, CK; Gin, KYH
Published in: The Science of the total environment
January 2018

Ballast water discharges are potential sources for the spread of invasive and pathogenic aquatic organisms. Ballast waters from six ships docked in the Port of Singapore were tested to determine if indictor organisms fell within proposed standards for ballast water discharge according to regulation D-2 of the Ballast Water Management Convention (BWMC) guidelines. Vibrio species were cultured on media supplemented with beta-lactam antibiotics to determine the presence of antibiotic resistant Vibrio species in the ballast waters of these vessels. Indicator organisms were quantified using culture media Colilert-18 and Enterolert in ballast waters of six ships docked in a tropical harbor, with uptake from different geographical locations. Of the six ships, one had ballast water originating from the Persian Gulf, another from the East China Sea, and four from the South China Sea. Two of the six ships which carried ballast waters from the East China Sea and the South China Sea did not meet the D-2 stipulated requirements of the Ballast Water Management Convention for indicator organisms with Enterococci values more than three times higher than the acceptable limit of <100CFU/100mL. Using the most-probable-number-PCR (MPN-PCR) method for Vibrio species detection, non-toxigenic species of V. cholerae (2 MPN/100mL), Vibrio vulnificus (>110 MPN/100mL), and Vibrio parahaemolyticus (2 to >110 MPN/100mL) were detected in at least one of six ballast water samples. Using thiosulfate-citrate-bile salts-sucrose agar (TCBS) supplemented with beta-lactam antibiotics (meropenem, ceftazidime), 11 different Vibrio species, exhibiting resistance to beta-lactam antibiotics were isolated; with Vibrio campbellii (44%) and Vibrio alginolyticus (15%) the most detected antibiotic resistant Vibrio species. A practical approach of prioritized screening of high-risk vessels should be conducted to ensure that the water quality meets D-2 standards prior to discharge.

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Published In

The Science of the total environment

DOI

EISSN

1879-1026

ISSN

0048-9697

Publication Date

January 2018

Volume

610-611

Start / End Page

651 / 656

Related Subject Headings

  • beta-Lactam Resistance
  • Water Microbiology
  • Vibrio
  • Singapore
  • Ships
  • Seawater
  • Environmental Sciences
 

Citation

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MLA
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Ng, C., Goh, S. G., Saeidi, N., Gerhard, W. A., Gunsch, C. K., & Gin, K. Y. H. (2018). Occurrence of Vibrio species, beta-lactam resistant Vibrio species, and indicator bacteria in ballast and port waters of a tropical harbor. The Science of the Total Environment, 610611, 651–656. https://doi.org/10.1016/j.scitotenv.2017.08.099
Ng, Charmaine, Shin Giek Goh, Nazanin Saeidi, William A. Gerhard, Claudia K. Gunsch, and Karina Yew Hoong Gin. “Occurrence of Vibrio species, beta-lactam resistant Vibrio species, and indicator bacteria in ballast and port waters of a tropical harbor.The Science of the Total Environment 610–611 (January 2018): 651–56. https://doi.org/10.1016/j.scitotenv.2017.08.099.
Ng C, Goh SG, Saeidi N, Gerhard WA, Gunsch CK, Gin KYH. Occurrence of Vibrio species, beta-lactam resistant Vibrio species, and indicator bacteria in ballast and port waters of a tropical harbor. The Science of the total environment. 2018 Jan;610–611:651–6.
Ng, Charmaine, et al. “Occurrence of Vibrio species, beta-lactam resistant Vibrio species, and indicator bacteria in ballast and port waters of a tropical harbor.The Science of the Total Environment, vol. 610–611, Jan. 2018, pp. 651–56. Epmc, doi:10.1016/j.scitotenv.2017.08.099.
Ng C, Goh SG, Saeidi N, Gerhard WA, Gunsch CK, Gin KYH. Occurrence of Vibrio species, beta-lactam resistant Vibrio species, and indicator bacteria in ballast and port waters of a tropical harbor. The Science of the total environment. 2018 Jan;610–611:651–656.
Journal cover image

Published In

The Science of the total environment

DOI

EISSN

1879-1026

ISSN

0048-9697

Publication Date

January 2018

Volume

610-611

Start / End Page

651 / 656

Related Subject Headings

  • beta-Lactam Resistance
  • Water Microbiology
  • Vibrio
  • Singapore
  • Ships
  • Seawater
  • Environmental Sciences