Pseudomonas is a genus of gammaproteobacteria. They are in the family of pseudomonads. Pseudomonas bacteria can be found in many different environments, such as soil, water, and plant and animal tissue.
|colourized scanning electron micrograph (SEM) of some Pseudomonas aeruginosa|
There are many Pseudomonas species. Some are parasitic and invade animal tissues. In humans, pathogenic Pseudomonas thrive, especially after antibiotic treatment: once they are able to multiply rapidly they can be harmful.