Volume 31, Number 2—February 2025
CME ACTIVITY - Synopsis
National Surveillance of Human Ehrlichiosis Caused by Ehrlichia ewingii, United States, 2013–2021
Sydney N. Adams, Nicolette C. Bestul, Kimberly N. Calloway, Gilbert J. Kersh, and Johanna S. Salzer
Table 1
Demographic characteristics of patients in study of national surveillance of human ehrlichiosis caused by Ehrlichia ewingii, United States, 2013–2021*
| Characteristics |
No. patients (%) |
Incidence† |
|---|---|---|
| Total no. patients | 234 | NA |
| Sex | ||
| M | 149 (63.7) | 0.14 |
| F | 84 (35.9) | 0.06 |
| Unknown |
1 (0.4) |
NA |
| Race‡ | ||
| White | 163 (69.7) | NA |
| Black | 2 (0.9) | NA |
| American Indian/Alaska Native | 0 | NA |
| Asian/Pacific Islander | 3 (1.3) | NA |
| Other | 7 (3.0) | NA |
| Missing | 2 (0.9) | NA |
| Unknown |
57 (24.4) |
NA |
| Ethnicity‡ | ||
| Hispanic | 3 (1.3) | NA |
| Non-Hispanic | 193 (82.5) | NA |
| Unknown |
38 (16.2) |
NA |
| Age, y | ||
| <10 | 0 | NA |
| 10–19 | 6 (2.6) | 0.08 |
| 20–29 | 8 (3.4) | 0.08 |
| 30–39 | 18 (7.7) | 0.12 |
| 40–49 | 25 (10.7) | 0.09 |
| 50–59 | 62 (26.5) | 0.17 |
| 60–69 | 54 (23.1) | 0.13 |
| >70 | 61 (26.1) | 0.13 |
| Unknown |
0 |
NA |
| Median age, y (IQR) | 59 (50–70) | NA |
*Values are no. (%) except as indicated. Confirmed cases of ehrlichiosis caused by Ehrlichia ewingii were reported to the US National Notifiable Disease Surveillance System. IQR, interquartile range, NA, not applicable. †Average incidence over the reporting period. ‡Because of large proportions of missing data, incidence was not calculated for race or ethnicity.
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Page updated: January 31, 2025
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