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Grouper and snapper are the potential fishery commodity in Indonesia with a high economic value, as well as an export commodity. A common disease in grouper and snapper aquaculture is vibriosis. Vibriosis is a disease caused by bacteria of the genus Vibrio. The aim of study was to compare between phenotypic and genotypic identification of Vibrio isolated from Batam and Mataram, Indonesia. Bacteria were isolated from anterior kidney and eye of fish, then grown in thiosulfate-citrate-bile salts-sucrose (TCBS) and incubated in room temperature (25-28 °C) for 24 h, and identified using morphology and biochemical test. Bacterial isolates were extracted, amplified and sequenced on 16S rRNA region. Phylogenetic tree of bacteria was constructed using neighbor-joining and maximum-parsimony methods. The phenotypic identification was found six isolates of Vibrio from Batam, such as V. alginolyticus, V. carchariae, V. damselae, V. fluvialis, V. furnissii and V. parahaemolyticus. Three isolates were found from Mataram, such as V. alginolyticus, V. carchariae and V. fluvialis. Blast analysis showed isolates of V. alginolyticus_btm and V. carchariae_btm homolog to V. parahaemolyticus strain DAHMV3; isolates of V. damselae_btm and V. alginolyticus_mtr homolog to V. neocaledonicus strain MS1; isolates of V. parahaemolyticus_btm and V. furnisii_btm homolog with Photobacterium damselae subsp. damselae strain: 04Ya311 and isolate of V. fluvialis_mtr homolog to V. azureus strain MMRF532, respectively. All phenotypic identification was not supported by molecular identification on 16S rRNA region. It was suggested that phenotypic identification should be supported by molecular examination, especially in identification of Vibrio species.

Phenotypic and Genotypic Comparison of Vibrio in Seawater Fish from Batam and Mataram, Indonesia