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. 2016 Jan 6;94(1):52–60. doi: 10.4269/ajtmh.15-0540

Figure 6.

Figure 6.

Summary of the number of annual cases of Ehrlichia chaffeensis (N = 3,593), reported through Case Report Forms, United States, 2008–2012. The annual number of cases is subdivided into polymerase chain reaction (PCR)-positive cases, PCR-negative cases, and cases for which PCR was not performed. The annotation above each vertical bar indicates the annual percent of reported cases diagnosed by PCR.