FIG. 1.

Results of in vitro culture isolation and PCR assays for E. chaffeensis-infected mice. Typical results obtained for each mouse strain were presented at each time point postinfection for all 7 mouse strains. Numbers 3, 8, 16, 23, 30, 50, and 92 refer to sample analysis days postinfection. Ninety-two days postinfection samples for C2D mice were not available. All control mice were negative for E. chaffeensis as determined by culture isolation and PCR assay. Culture, culture positives of E. chaffeensis from peritoneal exudate cells (+, positive; −, negative; c, contaminated; n, data not available); PCR, hybridization data from PCR assay for E. chaffeensis-specific ribosomal gene in genomic DNA isolated from liver samples.