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[[File:Pseudomonas.jpg|right|thumb|250px|<small><center> scanning electron micrograph (SEM) of a number of Pseudomonas aeruginosa bacteria.( Janice Haney Carr 2008, Wikimedia commons)</center></small>]]
The ''Pseudomonas'' species are Gram-negative rods. They are obligate aerobes and are oxidase and catalase positive.
The ''Pseudomonas'' species are motile by polar flagellae and cause opportunistic infections. Most ''Pseudomonas'' species are resistant to antibiotics due to their efflux pumps, which pump out the antibiotics before they can act. They contain porins in their cell wall that allows them to survive harsh conditions.
==References==
Krieg, Noel (1984). Bergey's Manual of Systematic Bacteriology, Volume 1. Baltimore: Williams & Wilkins. [[Category:To_Do_-_AimeeHicks]][[Category:Pseudomonas_and_Burkholderia_species]]