Table 1.
CDC reports of tickborne disease caused by bacterial and protozoan pathogens increased markedly from 2004 to 2016 (Rosenberg et al., 2018).
| Disease | Year | % increase | Pathogens | Tick vectors | |
|---|---|---|---|---|---|
| 2004 | 2016 | ||||
| Lyme disease | 19,804 | 36,429 | 84% | Borrelia burgdorferi, B. mayonii | Western blacklegged tick (Ixodes pacificus), Blacklegged tick (Ixodes scapularis) |
| Tularemia | 134 | 230 | 72% | Francisella tularensis | American dog tick (Dermacentor variabilis), Wood tick (Dermacentor andersoni), Lone star tick (Amblyomma americanum) |
| Spotted fever rickettsiosis | 1713 | 4269 | 149% | Rickettsia rickettsii. Rickettsia parkeri, Rickettsia sp 364D; Rickettsia akari | American dog tick (Dermacentor variabilis), Wood tick (Dermacentor andersoni), Brown dog tick (Rhipicephalus sanguineus) |
| Anaplasmosis/Ehrlichiosis | 875 | 5750 | 557% | Anaplasma phagocytophilum, Ehrlichia chaffeensis, E. ewingii, E. muris eauclairensis | Western blacklegged tick (Ixodes pacificus), Blacklegged tick (Ixodes scapularis), Lone star tick (Amblyomma americanum) |
| Babesiosis** | 1126 | 1910 | 70% | Babesia microti, B. divergens, B. duncani, strain MO-1 | Blacklegged tick (Ixodes scapularis) |
**Cases reported in 2011. No data for 2004.