Pseudomonas is a genus of Gram-negative bacteria belonging to the family Pseudomonadaceae in the class Gammaproteobacteria. The 348 members of the genus [2][3] demonstrate a great deal of metabolic diversity and consequently are able to colonize a wide range of niches. [4] .

Pseudomonas aeruginosa bacteria can cause a potentially fatal infection that spreads to other areas of your body and triggers other serious conditions, including sepsis and organ failure. A Pseudomonas aeruginosa infection can also be resistant to antibiotics.

Pseudomonas species are Gram-negative, aerobic bacilli measuring 0.5 to 0.8, μm by 1.5 to 3.0 μm. Motility is by a single polar flagellum. Species are distinguished by biochemical and DNA hybridization tests.

2024年5月13日 · There are over 140 species of Pseudomonas. Most of them are considered saprophytic, meaning they cannot make their own food and typically feed on dead or decaying organic matter. For the most part, they are no threat to humans or human health. However, roughly 25 species can cause infections in humans.

According to GTDB, the Pseudomonadaceae family currently includes seven genera: Azomonas, Azotobacter, Entomomonas, Oblitimonas, Pseudomonas, Thiopseudomonas, and Ventosimonas (https://gtdb.ecogenomic.org/tree?r=f__Pseudomonadaceae, accessed on 10 July 2021).

Six species, P. aeruginosa, P. fluorescens, P. monteilii, P. mosselii, P. putida, and P. veronii, produce a water-soluble, yellow-green or yellow-brown pigment known as pyoverdine. Because of this pigment, these six species are classified as members of the fluorescent pseudomonad group.

2017年9月6日 · Pseudomonas bacteria can be found in soil, marshes, coastal marine habitats, and plant and animal tissue; generally, these bacteria can tolerate a variety of physical conditions. Some of these species, such as Pseudomonas aeruginosa, are opportunistic pathogens.

The generic name Pseudomonas created for these organisms was defined in rather vague terms in 1894 as a genus of Gram-negative, rod-shaped, and polar-flagellated bacteria. Soon afterwards, a large number of species was assigned to the genus. Pseudomonads were isolated from many natural niches.

2021年8月18日 · The genus Pseudomonas hosts an extensive genetic diversity and is one of the largest genera among Gram-negative bacteria. Type strains of Pseudomonas are well known to represent only a small fraction of this diversity and the number of available Pseudomonas genome sequences is increasing rapidly.

Currently, more than 200 Pseudomonas species have approved names, and new species are identified each year as new habitats are explored.