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A genus of facultatively anaerobic, gram-negative rod-shaped bacteria in the family Pseudomonadaceae, usually resident in richly organic water and soil, and on fish species.

  • atypical A. salmonicida — miscellaneous infections of fish, not the identified A. salmonicida salmonicida, the cause of goldfish furunculosis, but may cause goldfish ulcer disease.
  • A. hydrophilia — causes ulcerative stomatitis (mouthrot, canker) of captive reptiles. Ulcerative lesions in the mouth may extend to cause osteomyelitis of the jaw bone, inflammation of the harderian gland and invasion of the corneospectacular area causing severe swelling. This bacterium may also cause septicemia, especially in aquatic snakes with access to infected water; causes fin, tail and snout erosions (red sore disease) in captive fish. May also cause diarrhea in foals.
  • A. liquefaciens — a group of closely related, motile aeromonads which cause hemorrhagic septicemia in many cultured pond-fish, aquarium fish and salmonids.
  • A. salmonicida salmonicida — causes goldfish ulcer disease, furunculosis in salmonids and erythrodermatitis in carp.
 
 
Wikipedia: Aeromonas
Aeromonas
Scientific classification
Kingdom: Bacteria
Phylum: Proteobacteria
Class: Delta Proteobacteria
Order: Aeromonadales
Family: Aeromonadaceae
Genus: Aeromonas
Stanier 1943
Type strain
Aeromonas hydrophila
Species

A. allosaccharophila
A. bestiarum
A. bivalvium
A. encheleia
A. enteropelogenes
A. euchrenophila
A. hydrophila
A. ichthiosmia
A. jandaei
A. media
A. molluscorum
A. popoffii
A. punctata
A. salmonicida
A. schubertii
A. sharmana
A. simiae
A. sobria
A. veronii

Aeromonas is a gram-negative, facultative anaerobic rod that morphologically resembles members of the family Enterobacteriaceae. Fourteen species of Aeromonas have been described, most of which have been associated with human diseases. The most important pathogens are A. hydrophila, A. caviae, and A. veronii biovar sobria. The organisms are ubiquitous in fresh and brackish water.

Two major diseases associated with Aeromonas are gastroenteritis and wound infections, with or without bacteremia. Gastroenteritis typically occurs after the ingestion of contaminated water or food, whereas wound infections result from exposure to contaminated water.

Although some potential virulence factors (e.g. endotoxins, hemolysins, enterotoxins, adherence factors) have been identified, their precise role is unknown. Aeromonas species cause: 1) opportunistic systemic disease in immunocompromised patients, 2) diarrheal disease in otherwise healthy individuals, and 3) wound infections.

Gastroenteritis

Gastrointestinal disease in children is usually an acute, severe illness, whereas that in adults tends to be chronic diarrhea. Severe Aeromonas gastroenteritis resembles shigellosis, with blood and leukocytes in the stool. Acute diarrheal disease is self limited, and only supportive care is indicated in affected patients.

Antimicrobial Therapy

Is necessary for patients with chronic diarrheal disease or systemic infection. Aeromonas species are resistant to penicillins, most cephalosporins, and erythromycin. Ciprofloxacin is consistently active against their strains in the U.S. and Europe, but resistant cases has been reported in Asia.


 
 

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Copyrights:

Veterinary Dictionary. Saunders Comprehensive Veterinary Dictionary 3rd Edition. Copyright © 2007 by D.C. Blood, V.P. Studdert and C.C. Gay, Elsevier. All rights reserved.  Read more
Wikipedia. This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Aeromonas" Read more

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