Amblyomma americanum: a Potential Vector of Human Ehrlichiosis

Burt E. Anderson Division of Viral and Rickettsial Diseases, and Division of Vector-Borne Infectious Diseases, National Center for Infectious Diseases, Centers for Disease Control and Prevention, Fort Collins, Atlanta, Georgia

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Kimetha G. Sims Division of Viral and Rickettsial Diseases, and Division of Vector-Borne Infectious Diseases, National Center for Infectious Diseases, Centers for Disease Control and Prevention, Fort Collins, Atlanta, Georgia

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James G. Olson Division of Viral and Rickettsial Diseases, and Division of Vector-Borne Infectious Diseases, National Center for Infectious Diseases, Centers for Disease Control and Prevention, Fort Collins, Atlanta, Georgia

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James E. Childs Division of Viral and Rickettsial Diseases, and Division of Vector-Borne Infectious Diseases, National Center for Infectious Diseases, Centers for Disease Control and Prevention, Fort Collins, Atlanta, Georgia

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Joseph F. Piesman Division of Viral and Rickettsial Diseases, and Division of Vector-Borne Infectious Diseases, National Center for Infectious Diseases, Centers for Disease Control and Prevention, Fort Collins, Atlanta, Georgia

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Christine M. Happ Division of Viral and Rickettsial Diseases, and Division of Vector-Borne Infectious Diseases, National Center for Infectious Diseases, Centers for Disease Control and Prevention, Fort Collins, Atlanta, Georgia

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Gary O. Maupin Division of Viral and Rickettsial Diseases, and Division of Vector-Borne Infectious Diseases, National Center for Infectious Diseases, Centers for Disease Control and Prevention, Fort Collins, Atlanta, Georgia

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Barbara J. B. Johnson Division of Viral and Rickettsial Diseases, and Division of Vector-Borne Infectious Diseases, National Center for Infectious Diseases, Centers for Disease Control and Prevention, Fort Collins, Atlanta, Georgia

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DOI:
https://doi.org/10.4269/ajtmh.1993.49.239
Volume/Issue:
Volume 49: Issue 2
Page(s):
239ā€“244
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Polymerase chain reaction primers specific for Ehrlichia chaffeensis were used to amplify DNA from extracts of pooled ticks. Amplification was performed on extracts from 140 pools (1,579 total ticks) consisting of three tick genera collected from five states. The characteristic 389-basepair product was observed after amplification of extracts from seven different pools of adult Amblyomma americanum (117 pools, 1,462 ticks), but not from pools of nymphs. No specific product was observed after amplification of 20 pools (105 ticks) of Dermacentor variabilis and three pools of Ixodes scapularis (12 ticks). Ehrlichia chaffeensis was present in A. americanum at a minimum frequency of ā‰„ 0.48%, suggesting that A. americanum may be a vector of human ehrlichiosis.
Copyright:
Copyright Ā© 1993 by The American Society of Tropical Medicine and Hygiene 1993
Published Online:
Aug 1993
Cover The American Journal of Tropical Medicine and Hygiene
The American Journal of Tropical Medicine and Hygiene
Print ISSN:
0002-9637
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