Shewanella putrefaciens, a major microbial species related to tetrodotoxin (TTX)-accumulation of puffer fish Lagocephalus lunaris

Aims To investigate the major micro‐organisms, which were isolated from internal organs, related to tetrodotoxin (TTX)‐accumulation of puffer fish Lagocephalus lunaris. Methods and Results Puffer fish Lagocephalus lunaris around Chang Island in the Gulf of Thailand were collected to examine TTX‐accu...

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Bibliographic Details
Published in:Journal of applied microbiology 2012-08, Vol.113 (2), p.459-465
Main Authors: Auawithoothij, W., Noomhorm, A.
Format: Article
Language:English
Subjects:
Animals
Bacteria
Bacterial Load
Biological and medical sciences
diversity
fish (live)
Fundamental and applied biological sciences. Psychology
identification
intestinal microbiology
Marine biology
Microbiology
Salinity
Seasons
Shewanella putrefaciens - growth & development
Temperature
Tetraodontiformes - metabolism
Tetraodontiformes - microbiology
Tetrodotoxin - metabolism
Thailand
Toxins
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Summary:Aims To investigate the major micro‐organisms, which were isolated from internal organs, related to tetrodotoxin (TTX)‐accumulation of puffer fish Lagocephalus lunaris. Methods and Results Puffer fish Lagocephalus lunaris around Chang Island in the Gulf of Thailand were collected to examine TTX‐accumulation and microbial load in internal organs. The nine predominant micro‐organisms isolated from the internal organs were determined TTX and studied in relation to the TTX‐accumulation of the puffer fish. Shewanella putrefaciens, a predominant bacterium and related to the TTX‐accumulation of the puffer fish, was examined growth and TTX‐production after culture in modified Zobell medium. The results revealed that the average TTX‐accumulation of the puffer fish directly varied to the bacterium load periodically, year‐round. Furthermore, it coincided with the growth and the TTX‐production of the bacterium, which grew slowly but produced high TTX at low temperature. Conclusions Shewanella putrefaciens was a major bacterium relating to TTX‐accumulation of puffer fish L. lunaris. It resulted in high TTX‐accumulation of the puffer fish at low temperatures of seawater. Significance and Impact of the Study Temperature affected growth and TTX‐production of S. putrefaciens that resulted in TTX accumulated in puffer fish L. lunaris.
ISSN:1364-5072
1365-2672
DOI:10.1111/j.1365-2672.2012.05339.x