Key points
Anaplasmosis is a disease caused by the bacterium, Anaplasma phagocytophilium, that has become increasingly nationally notifiable and most commonly affects people at risk in the upper midwestern and northeastern United States.
![An adult female blacklegged tick quests on a leaf for a host to pass.](/anaplasmosis/media/images/8686-Adult-female-western-blacklegged-tick.jpg)
Dashboard Data Files
- Annual incidence of reported anaplasmosis [XLS – 8 KB]
- Average annual incidence of reported anaplasmosis by age group [XLS – 315 B]
- Average number of reported cases of anaplasmosis by month of onset [XLS – 178 B]
- Number of reported cases of anaplasmosis [XLS – 466 B]
Note: some formatting errors may appear when opening .csv files in Excel. Import .csv into Excel or open files as .txt to avoid errors.