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Can anaplasmosis exposure remain dormant and not show up on blood work for 2-3 years?My dog was found 3 years ago. I have never seen a tick on him or in my yard.Annual bood work was negative until a month ago when it came back that he had been exposed. I'm wondering if he could have been exposed when he was "on the road" and it is just now showing positive.Thanks. I think my vet used the "in-office strip method" of testing prior to this year when the blood sample was sent to a lab.