General Information: The original was isolated from an inflected cauliflower in Sussex, United Kingdom, in 1958. Strain 8004 is a spontaneous rifampicin resistant strain. Causes black rot disease in crucifers. These organisms are almost exclusively found associated with their plant hosts and are not found free in the soil. This species is a major cause of black rot in crucifers, a disease that results in massive tissue degeneration. It also produces an extracellular polysaccharide known as xanthan, which is harvested commercially as a food stabilizing agent for use in industry.