Short Report: Geographic Distribution of Different Genetic Types of Ehrlichia chaffeensis

Xuejie Yu Department of Pathology, University of Texas Medical Branch, Division of Vector-Borne Infectious Diseases, National Center for Infectious Diseases, Centers for Disease Control and Prevention, Division of Viral and Rickettsial Diseases, Centers for Disease Control and Prevention, Galveston, Texas

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Joseph F. Piesman Department of Pathology, University of Texas Medical Branch, Division of Vector-Borne Infectious Diseases, National Center for Infectious Diseases, Centers for Disease Control and Prevention, Division of Viral and Rickettsial Diseases, Centers for Disease Control and Prevention, Galveston, Texas

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James G. Olson Department of Pathology, University of Texas Medical Branch, Division of Vector-Borne Infectious Diseases, National Center for Infectious Diseases, Centers for Disease Control and Prevention, Division of Viral and Rickettsial Diseases, Centers for Disease Control and Prevention, Galveston, Texas

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David H. Walker Department of Pathology, University of Texas Medical Branch, Division of Vector-Borne Infectious Diseases, National Center for Infectious Diseases, Centers for Disease Control and Prevention, Division of Viral and Rickettsial Diseases, Centers for Disease Control and Prevention, Galveston, Texas

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The 120-kD protein gene of Ehrlichia chaffeensis was used to characterize ehrlichial DNA from seven pools of adult Amblyomma americanum ticks. Ticks from Missouri, Kentucky, and North Carolina contained E. chaffeensis DNA of the Arkansas strain genotype. Ticks from North Carolina also contained ehrlichiae of the Sapulpa strain genotype, originally identified in Oklahoma.

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