THE SYSTEMATIC SYSTEM OF P. PESTIS STRAINS ISOLATED IN ARMENIA IN 1962
ARMY BIOLOGICAL LABS FREDERICK MD
Pagination or Media Count:
Cultures of the plague microbe, isolated during an epizootic in 1962 in the southeastern part of Armenia, based on their properties generally turned out to be very close to the strains of P. pestis which were isolated in the Armenian SSR in 1958--1959. Characteristic peculiarities of all of these strains, apart from ecological community, are the capability in early periods to ferment rhamnose and a lowering of virulence, and even avirulence, for guinea pigs. In a significant manner the stated properties go beyond the limits of those criteria which characterize the plague causative agent in its classical form. The report stresses that during the period of the described epizootic the causative agent was isolated only in the rough form, without the signs of dissociation, and that the data of epizootological observations pointed to the leading significance in the transmissive route of transmitting the infection infected fleas. The fact that in guinea pigs the stated strains form a sufficiently intense immunity to P. pestis in its typical form is also emphasized.