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A NEW VARIETY OF PLAGUE MICROBE,
ARMY BIOLOGICAL LABS FREDERICK MD
Pagination or Media Count:
In recent years in the Armenian SSR and the MNR acute epizootics were registered in various species of voles, and the isolated strains of plague bacteria displayed a striking resemblance to each other in relation to glycerin, nitrates, rhamnose, and urea, and also a mild virulence for guinea pigs. Strain 1260, isolated in 1959 in the Armenian SSR, was subjected to a detailed study in experiments on some wild and laboratory animals, during which a number of differences were detected between it and strains isolated from other rodents. During subcutaneous infection, strain 1260 turned out to be mildly pathogenic for midday gerbils, little susliks, guinea pigs, and white rats, and displayed a high virulence for white mice and common voles in which individual cases a prolonged bacteremia emerged. There are sufficient grounds for acknowledgement of the independence of the vole variety of the plague causative agent. A classification of the varieties of the plague microbe is cited. Apparently, several species of voles play the role of primary vectors of the plague causative agent and together with their fleas under favorable conditions are capable of supporting its multiplication and development in a countless number of generations. Author
APPROVED FOR PUBLIC RELEASE