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Volume 4, Number 2—June 1998


Dual Infection with Ehrlichia chaffeensis and a Spotted Fever Group Rickettsia: A Case Report

Daniel J. Sexton*Comments to Author , G. Ralph Corey*, Christopher Carpenter*, Li Quo Kong*, Tejel Gandhi*, Edward B. Breitschwerdt†, Barbara C. Hegarty†, Sheng-Ming Chen‡, Hui-Min Feng‡, Li Zhao‡, Juan Olano‡, David H. Walker‡, and Stephen J. Dumler§
Author affiliations: *Duke University Medical Center, Durham, North Carolina, USA; †North Carolina State University, Raleigh, North Carolina, USA; ‡University of Texas Medical Branch at Galveston, Galveston, Texas, USA; §Johns Hopkins Medical Center, Baltimore, Maryland, USA

Main Article

Table 1

Patient's T-lymphocyte proliferation when stimulated with antigens of Rickettsia rickettsii or Ehrlichia chaffeensis

Mitogenic stimulus Quantity of antigen (µg) Stimulation index
R. rickettsii 2.0 17.9
1.0 26.7
0.2 14.8
E. chaffeensis 4.0 65.3
2.0 19.1
0.4 48.7
Phytohemagglutinin 5.0 271.2
1.0 8.2

Main Article