Characterization of reptile-associated Borrelia sp. in the vector tick, Amblyomma geoemydae, and its association with Lyme disease and relapsing fever Borrelia spp

Ai Takano; Hiromi Fujita; Teruki Kadosaka; Satoru Konnai; Tomoko Tajima; Haruo Watanabe; Makoto Ohnishi; Hiroki Kawabata

doi:10.1111/j.1758-2229.2011.00280.x

Characterization of reptile-associated Borrelia sp. in the vector tick, Amblyomma geoemydae, and its association with Lyme disease and relapsing fever Borrelia spp

Environ Microbiol Rep. 2011 Oct;3(5):632-7. doi: 10.1111/j.1758-2229.2011.00280.x. Epub 2011 Aug 25.

Authors

Ai Takano¹, Hiromi Fujita, Teruki Kadosaka, Satoru Konnai, Tomoko Tajima, Haruo Watanabe, Makoto Ohnishi, Hiroki Kawabata

Affiliation

¹ United Graduate School of Agricultural Science and Veterinary Science, Gifu University, Gifu, Japan Department of Bacteriology-I, National Institute of Infectious Diseases, Tokyo, Japan Ohara Research Laboratory, Ohara General Hospital, Fukushima, Japan Department of Parasitology, Aichi Medical University, Aichi, Japan Department of Disease Control, Graduate School of Veterinary Medicine, Hokkaido University, Hokkaido, Japan Laboratory of Veterinary Microbiology, School of Life and Environmental Science, Osaka Prefecture University, Osaka, Japan.

PMID: 23761345
DOI: 10.1111/j.1758-2229.2011.00280.x

Abstract

The genus Borrelia is arthropod-borne infectious agents in vertebrates, and is classified into Lyme disease (LD) Borrelia spp. and Relapsing fever (RF) Borrelia spp. In addition to these Borrelia groups, we recently reported reptile-associated (REP) Borrelia spp. from reptiles and from hard-bodied ticks, which probably transmitted the REP Borrelia spp. In this study, we investigated the presence of REP Borrelia sp. in moulted ticks, and found that trans-stadial transmission of REP Borrelia sp. occurred in the midgut, while it was observed that REP Borrelia sp. entered the salivary gland during blood-feeding. This characteristic is also found in LD Borrelia spp., which are also transmitted by hard-bodied ticks. Although phylogenetic analysis demonstrated that REP Borrelia spp. are similar to RF Borrelia spp., the ecology of the spirochaetes within the vector ticks is different for REP Borrelia spp. and RF Borrelia spp. Elucidation of the evolutionary history of the genus Borrelia and its adaptation to ticks promises to be of great interest to researchers of vector-borne microorganisms.