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Aeromonas Bacteria > Proteobacteria > Delta
Proteobacteria > Aeromonadales > Aeromondaceae
Termed a facultative anaerobe, because it can exist in the
presence of oxygen and use oxygen for aerobic respiration, but it can also
exist in anaerobic (non-oxygenated) conditions where it derives its energy from
fermentation of organic substances such as carbohydrates. Found abundantly in
fresh and brackish water, as well as in food. Can cause disease in humans in
that it is one of the bacteria that can cause gastroenteritis (inflammation of
the gut) with accompanying diarrhea, and wound infections. Can also cause
disease in fish and frogs that are exposed to stressful conditions. About 14
species have been described.
Aeromonas hydrophila is common in aquatic
environments and besides being able to infect people, it can cause disease in
fish such as tail rot, fin rot, scale protrusion disease, ulcer disease and it
can also attack the liver and kidneys. However, it is also found naturally in
the fish gut and hence in general, diseases caused by Aeromonas hydrophila
are the result of stress. It also causes the disease called Red Leg
in Xenopus frogs, the main symptom of which is internal haemorrhaging,
which can result in death.
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