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Antimicrobial Agents and Chemotherapy, January 2003, p. 413-415, Vol. 47, No. 1
0066-4804/03/$08.00+0 DOI: 10.1128/AAC.47.1.413-415.2003
Copyright © 2003, American Society for Microbiology. All Rights Reserved.
Antibiotic Susceptibilities of Anaplasma (Ehrlichia) phagocytophilum Strains from Various Geographic Areas in the United States
Max Maurin,1,2 Johan S. Bakken,3 and J. Stephen Dumler2*
Unité des Rickettsies, Université de la Méditerranée, Faculté de Médecine, Marseille, France,1
Section of Infectious Diseases, SMDC Health System, Duluth, Minnesota,3
Division of Medical Microbiology, Department of Pathology, The Johns Hopkins University School of Medicine, Baltimore, Maryland2
Received 12 December 2001/
Returned for modification 19 June 2002/
Accepted 3 October 2002
We tested the antibiotic susceptibilities of eight strains of Anaplasma phagocytophilum (the agent of human granulocytic ehrlichiosis) collected in various geographic areas of the United States, including Minnesota, Wisconsin, California, and New York. The results are homogeneous and show that doxycycline, rifampin, and levofloxacin are the most active antibiotics against these strains in vitro.
* Corresponding author. Mailing address: Division of Medical Microbiology, Department of Pathology, The Johns Hopkins Medical Institutions, Meyer B1-193, 600 North Wolfe St., Baltimore, MD 21287. Phone: (410) 955-5077. Fax: (410) 614-8087. E-mail:
sdumler{at}jhmi.edu.
Antimicrobial Agents and Chemotherapy, January 2003, p. 413-415, Vol. 47, No. 1
0066-4804/03/$08.00+0 DOI: 10.1128/AAC.47.1.413-415.2003
Copyright © 2003, American Society for Microbiology. All Rights Reserved.
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