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Correspondence

The translation this year of Tickborne Rickettsiosis by M. M. Lyskovtsev [a review appears on p. 337—Editor sheds light on some earlier unavailable reports of Soviet studies of Strain "G" from the Far East, in Siberia, during and after World War II when Soviet publications became increasingly unavailable. It is reported by Lyskovtsev that Korshunova "isolated its agent from blood of patient G (in the Far East) by infecting avitaminized guinea pigs," but the subsequent discussion, including citations from Pavlovsky and immunologic peculiarities, are confusing as to the relation of "Grammatchikov" (strain G) to epidemic and "Siberian (‘concinna’ strain) tickborne typhus."

Through diplomatic channels and the Red Cross, I established complicated contacts in 1946 with Dr. Krontovskaya, then chief rickettsiologist in the Gamaleya Institute, and received from her lyophilized samples purporting to be the G strain and labeled "epidemical typhus," as well as strain B, earlier offered as a "satisfactory substitute for strain G"; two samples labeled "louse-borne fever," and "epidemical typhus" were revived, but another, "tick-borne fever," was not.