Anaplasmosis: Epidemiology

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The page below is a sample from the LabCE course Tickborne Diseases. Access the complete course and earn ASCLS P.A.C.E.-approved continuing education credits by subscribing online.

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Anaplasmosis: Epidemiology

Anaplasma phagocytophilum is an obligate intracellular bacterium most commonly acquired from tick bites. It's the causative agent of human granulocytic anaplasmosis transmitted by Ixodes scapularis in New England, North Central Atlantic states, Wisconsin, and Minnesota. Ixodes pacificus is the vector on the West coast. These are the same ticks that cause Lyme disease and Babesiosis as the endemic areas overlap. Ticks can be infected with more than one disease and transmit them both. Most cases are reported in the months from April to September.
Figure 27. Centers for Disease Control and Prevention. (2024). Annual incidence of reported anasplasmosis for 2021. [Image]. https://www.cdc.gov/anaplasmosis/hcp/statistics/index.html.

Figure 27. Incidence of reported anaplasmosis for 2021