PROBLEM TO BE SOLVED: To provide a specific test for accurate diagnosis of anaplasmosis caused by infection of granulocytic cells with Anaplasma phagocytophilum.SOLUTION: According to the present invention, there are provided a composition comprising one or more purified polypeptides consisting of a polypeptide consisting of a specific sequence; and an isolated polynucleotide encoding purified polypeptide. According to the present invention, furthermore, there are provided a method and composition for the detection and treatment of Anaplasma phagocytophilum and Anaplasma platys infection.SELECTED DRAWING: None
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