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Pseudomonas fluorescens
Pseudomonas fluorescens
Small, greyish colonies. There is no alteration of the blood.

Pseudomonas fluorescens produces the water soluble, yellowish-green pigment, pyoverdin. Pigment production can be stimulated by growing the bacteria on Kings B Agar, where the pigment can be seen in the agar around the colonies. Pyoverdin fluoresces in ultra violet light.

This culture was incubated at 30°C.

General characteristics: Gram-negative, straight or curved rods. Catalase- and oxidase-positive. Attacks sugars by oxidation. Obligately aerobic. Motile. They belong to the group of non-fermentative Gram-negative cocci and rods. Optimum temperature for growth is 25 - 30°C. They are found in soil and water, and are part of the aerobic, psychrotrophic spoilage flora of raw foods.
© Department of Veterinary Disease Biology 2011
Faculty of Health and Medical Sciences - University of Copenhagen