Pseudomonas

Motile, straight or slightly curved Gram –ve rods, arranged in pairs Aerobic respiration (can use nitrate or arginine as an alternate electron acceptor) Cytochrome oxidase (used to differentiate from enterobacteriaceae) Common in cystic fibrosis patients Produce diffusible pigments for preliminary ID (blue pyocyanin, yellow-green pyoverdin, pyorubin red-brown)