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Journal of Clinical Microbiology, February 2001, p. 494-497, Vol. 39, No. 2
Division of Infectious Disease, Tufts
University School of Veterinary Medicine, North
Grafton,1 and Department of Immunology
and Infectious Diseases, Harvard School of Public Health,
Boston,2 Massachusetts; Southwest
Foundation for Biomedical Research, San Antonio,
Texas3; and Department of Veterinary
Pathobiology, University of Illinois School of Veterinary Medicine,
Urbana, Illinois4
Received Recevied 15 May 2000/Returned for modification 5 September
2000/Accepted 9 November 2000
Although Borrelia theileri, the agent of bovine
borreliosis, was described at the turn of the century (in 1903), its
relationship with borreliae causing Lyme disease or relapsing fever
remains undescribed. We tested the previously published hypothesis that spirochetes infecting Lone Star ticks (Amblyomma
americanum) may comprise B. theileri by analyzing the
16S ribosomal DNAs (rDNAs) and flagellin genes of these spirochetes.
B. theileri, the Amblyomma agent, and B. miyamotoi formed a natural group or clade distinct from but most
closely related to that of the relapsing fever spirochetes. B. theileri and the Amblyomma agent were 97 and 98%
similar at the nucleotide level within the analyzed portions of the 16S
rDNA and the flagellin gene respectively, suggesting a recent
divergence. The agent of bovine borreliosis might be explored as a
surrogate antigen for the as-yet-uncultivatable Amblyomma
agent in studies designed to explore the etiology of a Lyme
disease-like infection associated with Lone Star ticks.
0095-1137/01/$04.00+0 DOI: 10.1128/JCM.39.2.494-497.2001
Copyright © 2001, American Society for Microbiology. All rights reserved.
Lone Star Tick-Infecting Borreliae Are Most Closely
Related to the Agent of Bovine Borreliosis
*
Corresponding author. Mailing address: Dept. of
Immunology and Infectious Diseases, Harvard School of Public Health,
665 Huntington Ave., Boston, MA 02115. Phone: (617) 432-4079. Fax:
(617) 432-1796. E-mail: stelford{at}hsph.harvard.edu.
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