BIOLOGICAL PROPERTIES OF THE NIIEG TULAREMIA VACCINAL STRAINS
FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OH
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A study was made of the biological properties of the NIIEG tularemia vaccinal strains Nos. 10, 33, and 53 as compared to the standard Gaiskys No. 15 vaccinal strain. The properties of the NIIEG strain showed no change after a 10-year storage in dried condition without any transfers. Strains Nos. 10 and 53 are harmless for guinea pigs and are highly immunogenic. Strain No. 53 possesses a reduced immunogenicity. The author recommends strain Nos. 10 and 53 as a reserve for the production of dry live tularemia vaccine.