An Outbreak of Spotted Fever Rickettsiosis in U.S. Army Troops Deployed to Botswana
Bonnie L. Smoak*, J. Bruce McClain‡, John F. Brundage*, Laurel Broadhurst*, Daryl J. Kelly†§, Gregory A. Dasch§, and Richard N. Miller*
Author affiliations: *Divisions of Preventive Medicine and †Communicable Diseases and Immunology, Walter Reed Army Institute of Research, Washington, D.C., USA; ‡U.S. Army MEDDAC, Vicenza, Italy; §Viral and Rickettsial Diseases Program, U.S. Naval Medical Research Institute, Bethesda, Maryland, USA
Figure 1. Western blot reactivity of convalescent-phase serum from a patient with spotted fever rickettsiosis with high standing titers. Antigens from the rickettsial isolates were solubilized at room termperature or boilded for 5 minutes before electrophoresis. The darkest large bands indicate R. africae, R. conorii, and Israeli tick typhus rickettsiae [ISTT] (no specificity detected). R. typhi is a member of the typhus group of rickettsiae, whereas all other isolates are members of the spotted fever group.
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