Fish Pathology
Online ISSN : 1881-7335
Print ISSN : 0388-788X
Short Communication
Aeromonas veronii biovar sobria Associated with Mortalities of Riverine Ayu Plecoglossus altivelis in the Tama River
Hisato TakeuchiAki NambaKazutomo HoriShosaku KashiwadaNobuhiro Mano
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2018 Volume 53 Issue 2 Pages 86-89


In July 2016, there were mortalities of riverine ayu Plecoglossus altivelis in a tributary of the Tama River, Japan. ​A Gram-negative, motile and short rod-shaped bacterium was dominantly isolated from all examined dead fish, and identified as Aeromonas veronii biovar sobria. ​Biochemical characteristics and gyrB sequence of the present strains differed from those of A. veronii strains from ayu in previous years. ​The present strains also caused higher mortalities to ayu than A. veronii strains previously isolated. ​These results indicate that the present mortalities of riverine ayu in the Tama River were caused by high pathogenic A. veronii biovar sobria.

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© 2018 The Japanese Society of Fish Pathology
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