Fermentation process for producing a virulence factor from bordetella

摘要

A process for fermenting Bordetella species comprising incubating a sample of bacteria of a Bordetella species in a first environment under at least one bvg (Bordetella virulence genes) modulating condition, for at least 5 generations, to produce a mature culture, and then incubating the mature culture in a second environment in the absence of the at least one bvg modulating condition.