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  • Anaplasmosis is caused by the bacterium Anaplasma phagocytophilum and is transmitted by the bite of an infected tick, particularly the blacklegged tick (Ixodes scapularis) and the western blacklegged tick (Ixodes pacificus).  The disease is characterized by fever, headache, chills, and muscle aches.  Anaplasmosis is diagnosed based on clinical signs and symptoms and then later confirmed using laboratory tests.  The most effective treatment is doxycycline.  Tick-bite prevention is the best way to avoid being infected.     

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