[Production and study of anthrax antigen. I. Nutrient medium for production of native anthrax protective antigen]

The authors present the results of studies concerning the choice of nutrient bases and elaboration of a medium for obtaining anthrax protective antigen providing an active preparation. Filtrates of crude cultures obtained on the nutrient medium prepared of 3% hydrochloric hydrolyzate of fish flour, corn extract, glucose, sodium bicarbonate and mineral salts proved to be the most active. Tests for determination of usefulness of the culture fluids with the maximum content in them of the protective antigen are recommended.