[Optimal preservation of function in vacuum-dried bacteria (author's transl)].

Experience has shown that there are natural processes assuring a good preservation of virulence of delicate bacteria over intervals between epidemic outbreaks. Similarly, fetal bovine serum enriched with 10% saccharose was found to be an ideal medium for rendering bacteria well preservable without losing essential functional characteristics by means of vacuum-drying. Cotton wool DAB 7 has proved to be a good support. The available findings would let also delicate aerobic and anaerobic bacteria appear to be suitable for this kind of preservation, retaining their full capacity to multiply for at least one year inclusive of sensitive functional parameters. Results have been grouped in a number of synoptic tables, Bacteria that would not admit of the method of preservation described, have not been found thus far.