''Aeromonas veronii'' is a

Gram-negative Gram-negative bacteria are bacteria that do not retain the crystal violet stain used in the Gram staining method of bacterial differentiation. They are characterized by their cell envelopes, which are composed of a thin peptidoglycan cell wa ...

rod-shaped A bacillus (), also called a bacilliform bacterium or often just a rod (when the context makes the sense clear), is a rod-shaped bacterium or archaeon. Bacilli are found in many different taxonomic groups of bacteria. However, the name '' Baci ...

bacterium Bacteria (; singular: bacterium) are ubiquitous, mostly free-living organisms often consisting of one biological cell. They constitute a large domain of prokaryotic microorganisms. Typically a few micrometres in length, bacteria were amon ...

found in fresh water and in association with animals. It can be a pathogen of humans and a beneficial symbiont of leeches. In humans ''A. veronii'' can cause diseases ranging from wound infections and

diarrhea Diarrhea, also spelled diarrhoea, is the condition of having at least three loose, liquid, or watery bowel movements each day. It often lasts for a few days and can result in dehydration due to fluid loss. Signs of dehydration often begin w ...

sepsis Sepsis, formerly known as septicemia (septicaemia in British English) or blood poisoning, is a life-threatening condition that arises when the body's response to infection causes injury to its own tissues and organs. This initial stage is follo ...

in immunocompromised patients. Humans treated with

medicinal leeches ''Hirudo medicinalis'', the European medicinal leech, is one of several species of leeches used as "medicinal leeches". Other species of ''Hirudo'' sometimes also used as medicinal leeches include '' H. orientalis'', ''H. troctina'', and '' H. ...

after vascular surgery can be at risk for infection from ''A. veronii'' and are commonly placed on prophylactic antibiotics. Most commonly ciprofloxacin is used but there have been reports of resistant strains leading to infection. In leeches, this bacterium is thought to function in the digestion of blood, provision of nutrients, or preventing other bacteria from growing.

Protective effect

A 2005 study showed the potential for using

probiotic Probiotics are live microorganisms promoted with claims that they provide health benefits when consumed, generally by improving or restoring the gut microbiota. Probiotics are considered generally safe to consume, but may cause bacteria- host ...

s for controlling '' Streptococcus iniae'' infection in

trout Trout are species of freshwater fish belonging to the genera '' Oncorhynchus'', '' Salmo'' and '' Salvelinus'', all of the subfamily Salmoninae of the family Salmonidae. The word ''trout'' is also used as part of the name of some non-salm ...

. This study used the gastrointestinal contents of rainbow trout to screen for bacteria that inhibited growth of ''S. iniae'' and ''

Lactococcus garvieae ''Lactococcus garvieae'' is a known fish pathogen affecting saltwater fish in the Far East, specifically in rainbow trout, Japanese yellowtail, Cobia (''Rachycentron canadum'') and grey mullet (''Mugil cephalus''). This bacteria causes lesions ...

''. They identified ''A. veronii'' as a potential candidate for control of ''S. iniae'' and ''L. garvieae'' infections in aquaculture. ''A. veronii'', given live in the feed, protected the trout when challenged with ''S. iniae'' or ''L. garvieae''.

References

External links

Type strain of ''Aeromonas veronii'' at Bac''Dive'' - the Bacterial Diversity Metadatabase
Aeromonadales Bacteria described in 1987 {{gammaproteobacteria-stub