VIOLIN: Vaccine Investigation and Online Information Network

Pathogen Page

Aeromonas salmonicida

I. General Information

1. NCBI Taxonomy ID:

2. Disease:

Furunculosis, Bald sea urchin disease

3. Introduction

Aeromonas salmonicida is a species of Gram-negative bacteria, from the genus Aeromonas, which causes the disease furunculosis in marine and freshwater fish. The symptoms the fish show are external and internal hemorrhaging, swelling of the vents and kidneys, boils, ulcers, liquefaction, and gastroenteritis. Furunculosis is commonly known as tail rot in fish and is common in gold and koi fish. Infected fish with open sores are able to spread the disease to other fish. It is also responsible for bald sea urchin disease.

Most strands of the bacterium are non-motile. It is bacillus in shape. The short rods have rounded ends which allow it to be easily confused as a coccus. Aeromonas salmonicida is a facultative anaerobe which means that it is capable of making ATP by aerobic respiration if oxygen is present but is also capable of switching to fermentation when oxygen is not present. It does not ferment sucrose or lactose, using glucose in this pathway instead; glucose fermentation creates gas (Wiki: Aeromonas salmonicida).

4. Host Ranges and Animal Models

All species of salmon, trout, charr and grayling are susceptible to infection with Aeromonas salmonicida (USGS Fish Disease Leaflets).

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