Dyrkningsmedium med sojabönneekstrakt som aminosyrekilde og ingen proteinkomplekser af dyreoprindelse

摘要

The invention relates to a medium for culturing pathogenic bacteria to produce an immunogenic factor. The medium comprises non-animal derived proteinaceous material. The invention also relates to the use of the medium to cultivate pathogenic bacteria, obtaining immunogenic factors from the bacteria being cultivated and preparing vaccines using the immunogenic factors.