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Volume 13, Number 5—May 2007

Dispatch

Gulf Coast Ticks (Amblyomma maculatum) and Rickettsia parkeri, United States

John W. Sumner*, Lance A. Durden†, Jerome Goddard‡, Ellen Y. Stromdahl§, Kerry L. Clark¶, Will K. Reeves*, and Christopher D. Paddock*Comments to Author 
Author affiliations: *Centers for Disease Control and Prevention, Atlanta, GA, USA; †Georgia Southern University, Statesboro, GA, USA; ‡Mississippi Department of Health, Jackson, Mississippi, USA; §US Army Center for Health Promotion and Preventive Medicine, Aberdeen Proving Ground, Maryland, USA; ¶University of North Florida, Jacksonville, Florida, USA;

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Table

Gulf Coast ticks (Amblyomma maculatum) infected with spotted fever group rickettsiae, United States, 1996–2005

Rickettsia sp. identified State County Total ticks positive/total ticks tested* Year collected Stage, sex† Source
Rickettsia parkeri
Florida
Duval
1/9
1999
Adult, F
Vegetation


Franklin
3/25
2004
Adults, M, F
Vegetation



3/38
2005
Adults, M, F
Vegetation

Georgia
Bulloch
2/20
1999
Adults, M, F
Vegetation



5/16
2003
Adults, M, F
Vegetation



3/24
2005
Adults, M, F
Vegetation


McIntosh
1/4
2005
Adult, F
Vegetation

Kentucky
Montgomery
1/1
2003
Adult, M
Human

Mississippi
Copiah
1/9
2002
Adult, M
Vegetation

Oklahoma
Pittsburgh
1/1
1997
Nymph‡
Sigmodon hispidis

South Carolina
Anderson
1/4
2005
Adult, M
Canis latrans
Noncharacterized Rickettsia sp.§
Florida
Nassau
1/13
1996
Adult, F
Vegetation


Franklin
1/38
2005
Adult, F
Vegetation

Mississippi
Copiah
1/9
2002
Adult, F
Vegetation

Georgia
Bulloch
1/20
1999
Adult, F
Vegetation
1/24 2005 Adult, F Vegetation

­­­­­­­­­­­­­­*Some specimens obtained from a given county during a given year were not collected synchronously.
†Identified by PCR; nonengorged specimens unless otherwise specified.
‡Engorged specimen.
§Based on a unique rompA sequence.

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