Aeromonadaceae

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Aeromonadaceae
Aeromonas hydrophila

Aeromonas hydrophila

Systematics
Domain : Bacteria (bacteria)
Department : Proteobacteria
Class : Gammaproteobacteria
Order : Aeromonadales
Family : Aeromonadaceae
Scientific name
Aeromonadaceae
Colwell et al. 1986

The Aeromonadaceae are a family of bacteria in the order Aeromonadales .

features

Appearance

They are rod-shaped bacteria that are straight or curved. The Gram stain is negative. Many species are motile by polar flagella , some are immobile. They usually occur individually, but pairs or short chains also occur. They do not form endospores or microcysts .

Growth and metabolism

All representatives are chemo-organotrophic , photosynthesis is not carried out. They are facultatively anaerobic , so they can live in the presence or absence of oxygen and use fermentation to generate energy. When oxygen is present, aerobic breathing is performed. Most species are oxidase- positive and use glucose as a metabolic substrate . They reduce nitrate to nitrite . Many species use ammonium salts as the sole source of nitrogen. Oceanimonas needs NaCl . The representatives of the family tolerate a relatively wide range of temperatures for growth, there are both mesophilic and psychrophilic species.

Chemotaxonomy

The GC content , ie the proportion of the nucleobases guanine and cytosine in the bacterial DNA , is in the range from 40 to 63  mol percent .

Pathogenicity

Some types of Aeromonas are among the spoilage agents in food, as these types are psychrophilic (cold-loving), they can also spoil cold storage goods . The species of Aeromonas pathogenic to humans include e.g. B. Aeromonas punctata subsp. caviae and Aeromonas hydrophila . Aeromonas hydrophila can also cause disease in fish, but is primarily known as a pathogen in frogs.

Systematics

The family of the Aeromonadaceae forms together with the family of the Succinivibrionaceae the order of the Aeromonadales , this is in the class of the Gammaproteobacteria. Aeromonas is the type genus of the family and the order. The family includes the following genera (as of January 24, 2019):

  • Aeromonas Stanier 1943
  • Oceanimonas corrig. Brown et al. 2001 emend. Ivanova et al. 2005
  • Oceanisphaera Romanenko, et al. 2003 emend. Srinivas et al. 2012 emend. Xu et al. 2014
  • Pseudaeromonas Padakandla and Chae 2017
  • Tolumonas Fischer-Romero et al. 1996 emend. Caldwell et al. 2011
  • Zobellella Lin & Shieh 2006 emend. Yi et al. 2011

The family was first described in 1986 by Rita R. Colwell . The type genus Aeromonas had previously been assigned to the Vibrionaceae family.

ecology

The species of the Aeromonadaceae family are widespread and occur in freshwater , brackish water and also in seawater . Aeromonadaceae have also been detected in wastewater .

Individual evidence

  1. ↑ a b c d e f g R. R. Colwell, MT MacDonell, J. De Ley: Proposal to Recognize the Family Aeromonadaceae fam. nov. In: International Journal of Systematic Bacteriology. Volume 36, No. 3, July 1986, pp. 473-477, ISSN  0020-7713 . doi : 10.1099 / 00207713-36-3-473 .
  2. ↑ a b c d George Garrity, Don J. Brenner, Noel R. Krieg, James R. Staley (Eds.): Bergey's Manual of Systematic Bacteriology: Volume 2: The Proteobacteria, Part B: The Gammaproteobacteria . 2nd Edition. Springer-Verlag, New York 2005, ISBN 978-0-387-24144-9 .
  3. ↑ JJ Farmer III, MJ Arduino, FW Hickman-Brenner: The Genera Aeromonas and Plesiomonas . In: Martin Dworkin, Stanley Falkow, Eugene Rosenberg, Karl-Heinz Schleifer, Erko Stackebrandt (Eds.): The Prokaryotes, A Handbook of the Biology of Bacteria, Vol. 6: Proteobacteria: Gamma Subclass. 3. Edition. Springer-Verlag, New York et al. O. 2006, ISBN 0-387-30746-X .
  4. ^ Jean Euzéby, Aidan C. Parte: Family Aeromonadaceae. In: List of Prokaryotic names with Standing in Nomenclature ( LPSN ). Retrieved January 24, 2019 .

Web links

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