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Volume 21, Number 3—March 2015
Letter

Molecular Detection of Ehrlichia chaffeensis in Humans, Costa Rica

Norman RojasComments to Author , Daniela Castillo, and Priscilla Marin
Author affiliations: Universidad de Costa Rica, San Jose, Costa Rica

Main Article

Table

Clinical manifestations in patients and laboratory findings of Ehrlichia PCR-positive and negative blood samples, Costa Rica

Characteristics
Patient group, no. (%)
Clinical findings at first examination PCR-positive, n = 5 PCR-negative, n = 17
History of tick bite 5 (100) 12 (70.6)
Fever 2 (40) 1 (6)
Rash 4 (80) 11 (64.7)
General arthralgia 5 (100) 11 (64.7)
Headache 4 (80) 7 (41.2)
Detection of morulae 1 (20) 12 (70.6)
Positive response to doxycycline
1 (20)
8 (47.1)
Laboratory findings Range (reference value)*
Leukocytes 5.3–7.9 × 109 cells/L (5–10 × 109 cells/L) 6.0–8.9 × 109 cells/L (5–10 × 109 cells/L)
Platelets 190–299 × 109 cells/L (150–450 × 109 cells/L) 217–329 × 109 cells/L(150–450 × 109 cells/L)
Hemoglobin 12.9–14.9 (12.5–17 g/dL) 12.7–16.1 (12.5–17 g/dL)
Aspartate aminotransferase 27–39 U/L (13–39 U/L) 26–36 U/L (13–39 U/L)
Alanine transaminase 21–49 U/L (7–52 U/L) 25–41 U/L (7–52 U/L)

*Laboratory values at time of sampling for this study.

Main Article

Page created: February 18, 2015
Page updated: February 18, 2015
Page reviewed: February 18, 2015
The conclusions, findings, and opinions expressed by authors contributing to this journal do not necessarily reflect the official position of the U.S. Department of Health and Human Services, the Public Health Service, the Centers for Disease Control and Prevention, or the authors' affiliated institutions. Use of trade names is for identification only and does not imply endorsement by any of the groups named above.
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