(Science: bacteria) genus of gram-negative bacteria. They are rod shaped and are motile, possessing one or more polar flagella. Several species produce characteristic water soluble fluorescent pigments. They are found in soil and water.
pseudomonas syringae is a plant pathogen causing leaf spot and wilt. Pseudomonas aeruginosa, normally a soil bacterium, is an opportunistic pathogen of humans who are immunocompromised. It can infect the wounds of victims with severe burns, causing the formation of blue pus.