Related Experiment Video
Updated: Jul 19, 2026

Development of a More Sensitive and Specific Chromogenic Agar Medium for the Detection of Vibrio parahaemolyticus and Other Vibrio Species
Published on: November 8, 2016
Vibrio harveyi associated with Aglaophenia octodonta (Hydrozoa, Cnidaria)
L Stabili1, C Gravili, S Piraino
1Istituto Ambiente Marino Costiero, Sezione di Taranto, CNR, 74100 Taranto, Italy. kojimah@pop.lowtem.hokudai.ac.jp
Abstract:
A previously unknown association between a luminous bacterium, Vibrio harveyi, and a benthic hydrozoan, Aglaophenia octodonta, is described. Aglaophenia hydrocladia showed a clear fluorescence in the folds along the hydrocaulus and at the base of the hydrotheca, suggesting the presence of luminous bacteria. This hypothesis was confirmed by isolation of luminous bacteria from Aglaophenia homogenates. Phenotypic characterization of bacterial isolates was performed by several morphological, biochemical, and cultural tests, completed with 16S rDNA sequence analysis. All the isolates were referred to a single species: V. harveyi. The association between V. harveyi and A. octodonta has epidemiological as well as ecological significance. Therefore, A. octodonta may function as habitat "islands" providing a unique set of environmental conditions for luminous bacteria colonization, quite different from those already recorded from the plankton for other Vibrio species.
Related Concept Videos
Diversity of Protists II
Cholera
Bacterial Phylum Verrucomicrobiota
Giardiasis
Bacterial Phylum Proteobacteria
Surface Appendages of Archaea

