ON THE PRODUCTION OF CRYSTALLOMORPH CONCRETIONS OF A PROTEIDIC NATURE BY A STRAIN OF PASTEURELLA PESTIS
ARMY BIOLOGICAL LABS FREDERICK MD
Pagination or Media Count:
For some twenty years the appearance of whitish concretions interspersed in cultures made on nutrient gelatin from the Girard Robic EV strain of Pasteurella pestis was merely a bacteriological curiosity. The author succeeded in determining the most favorable conditions for producing the concretions for the purpose of study. Desication together with aeration are the determining factors in producing the phenomenon on a gelatin medium. An analysis of the crystallized product reveals the identifiable presence of seven amino acids. This fact, together with the results of a spectral analysis, proves the proteidic nature of the concretions. The significance of this phenomenon is still unknown, but further research, now being conducted by the author, will probably throw more light on the problem.