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Journal of Clinical Microbiology, December 2000, p. 4655-4656, Vol. 38, No. 12
0095-1137/00/$04.00+0
Copyright © 2000, American Society for Microbiology. All rights reserved.

Detection of Ehrlichia chaffeensis DNA in Amblyomma americanum Ticks in Connecticut and Rhode Island

Jacob W. Ijdo,1 Caiyun Wu,1 Louis A. Magnarelli,2 Kirby C. Stafford III,2 John F. Anderson,2 and Erol Fikrig1,*

Section of Rheumatology, Department of Internal Medicine, Yale University School of Medicine,1 and The Connecticut Agricultural Experiment Station,2 New Haven, Connecticut

Received 30 May 2000/Returned for modification 5 September 2000/Accepted 27 September 2000

Ehrlichia chaffeensis, the causative agent of human monocytic ehrlichiosis, is transmitted by Amblyomma americanum ticks, which are most abundant in the southern United States. Because serologic evidence suggests that residents of Connecticut are exposed to E. chaffeensis, A. americanum ticks were collected in Connecticut and Rhode Island for PCR analysis to detect E. chaffeensis DNA. Eight of 106 (7.6%) A. americanum ticks from Connecticut and 6 of 52 (11.5%) from Rhode Island contained E. chaffeensis DNA. Thus, E. chaffeensis is present in ticks in southern New England and transmission of E. chaffeensis may occur there.

* Corresponding author. Mailing address: 608 Laboratory of Clinical Investigation, Section of Rheumatology, Department of Internal Medicine, Yale University School of Medicine, 333 Cedar St., New Haven, CT 06520-8031. Phone: (203) 785-2453. Fax: (203) 785-7053. E-mail: erol.fikrig{at}yale.edu.

Journal of Clinical Microbiology, December 2000, p. 4655-4656, Vol. 38, No. 12
0095-1137/00/$04.00+0
Copyright © 2000, American Society for Microbiology. All rights reserved.


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