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Sequencing the genomes of hundreds of strains revealed highly divergent species within the genus. In fact, many genomes of Pseudomonas share only 50-60% of their genes, e.g. P. aeruginosa and P. putida share only 2971 proteins out of 5350 (or ~55%). [18] By 2020, more than 500 complete Pseudomonas genomes were available in Genebank.
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.
Pseudomonas infection refers to a disease caused by one of the species of the genus Pseudomonas. P. aeruginosa is a germ found in the environment and it is an opportunistic human pathogen most commonly infecting immunocompromised patients, such as those with cancer , diabetes , cystic fibrosis , [ 1 ] severe burns, AIDS , [ 2 ] or people who ...
The species name aeruginosa is a Latin word meaning verdigris ("copper rust"), referring to the blue-green color of laboratory cultures of the species. This blue-green pigment is a combination of two secondary metabolites of P. aeruginosa , pyocyanin (blue) and pyoverdine (green), which impart the blue-green characteristic color of cultures. [ 7 ]
The type order is the Pseudomonadales, which include the genera Pseudomonas and the nitrogen-fixing Azotobacter, along with many others. Besides being a well-known pathogenic genus, Pseudomonas is also capable of biodegradation of certain materials, like cellulose. [36] The Hydrogenophilalia are thermophilic chemoheterotrophs and autotrophs. [39]
Acinetobacter species are able to survive on various surfaces (both moist and dry) in the hospital environment, thereby being an important source of infection in debilitated patients. These bacteria are innately resistant to many classes of antibiotics. In addition, Acinetobacter is uniquely suited to exploitation for biotechnological purposes. [2]
In 2017, multidrug-resistant Pseudomonas aeruginosa caused an estimated 32,600 infections in hospitalized patients in the U.S. and 2,700 estimated deaths, per the CDC.
Stenotrophomonas is a genus of Gram-negative bacteria, [2] comprising at least twenty-six species. The main reservoirs of Stenotrophomonas are soil and plants. [3] Stenotrophomonas species range from common soil organisms (S. nitritireducens) to opportunistic human pathogens (S. maltophilia); the molecular taxonomy of the genus is still ...