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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
environmental science
Occurrence, seasonality and genetic diversity of Vibrio vulnificus in coastal seaweeds and water along the Kii Channel, Japan
FEMS Microbiology Ecology, Volume 64, No. 2, Year 2008
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Description
Vibrio vulnificus is a ubiquitous toxigenic bacterium found in a coastal environment but little is known about its occurrence and seasonality among seaweeds, which are widely consumed as seafood in Japan. Therefore, we have observed the bacterium's abundance in seawater and seaweed samples from three areas of the Kii Channel, Japan, during June 2003 to May 2004. A total of 192 samples were collected: 24 from each source in summer, autumn, winter and spring. The samples were selectively cultivated following the most probable number (MPN) technique. Vibrio vulnificus population ranged from 0 to 10 3 MPN 100 mL-1 seawater or 10 g seaweeds; higher counts were observed during summer. The optimum temperature, salinity and pH for the bacterium were 20-24 °C, 24-28 p.p.t. and 7.95-8.15, respectively. However, seaweeds always contained higher V. vulnificus than seawater. Among 280 V. vulnificus strains, detected by species-specific colony hybridization and PCR, 78, 74, 11 and 16 were from seaweeds and 46, 42, 2 and 11 were from seawater during summer, autumn, winter and spring, respectively. Ribotyping of 160 selected strains revealed a higher genotypic diversity (18 patterns) among strains from seaweeds than from seawater (10 patterns). Seaweeds can thus act as a potential habitat for V. vulnificus and are more unsafe for consumption during summer. © 2008 Federation of European Microbiological Societies Published by Blackwell Publishing Ltd.
Authors & Co-Authors
Mahmud, Zahid Hayat
Bangladesh, Dhaka
Icddrb, Laboratory Sciences Division
Japan, Tokushima
Tokushima University
Neogi, Sucharit Basu
Bangladesh, Dhaka
Icddrb, Laboratory Sciences Division
Kassu, Afework
Japan, Tokushima
Tokushima University
Ethiopia, Gondar
University of Gondar
Mai Huong, Bui Thi
Japan, Tokushima
Tokushima University
Viet Nam, Hanoi
National Institute of Nutrition Vietnam
Jahid, Md Iqbal Kabir
Bangladesh, Dhaka
Icddrb, Laboratory Sciences Division
Islam, Mohammad Sirajul
Bangladesh, Dhaka
Icddrb, Laboratory Sciences Division
Ota, Fusao
Japan, Tokushima
Tokushima University
Statistics
Citations: 63
Authors: 7
Affiliations: 4
Identifiers
Doi:
10.1111/j.1574-6941.2008.00460.x
ISSN:
01686496
e-ISSN:
15746941
Research Areas
Environmental
Genetics And Genomics
Study Design
Cross Sectional Study
Study Approach
Qualitative