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      Complete Genome Sequencing of Borrelia valaisiana and Borrelia afzelii Isolated from Ixodes persulcatus Ticks in Western Siberia

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          Abstract

          Lyme disease, caused by bacteria of the Borrelia burgdorferi sensu lato complex, is the most frequent tick-borne infection in Eurasia. Here, we report the complete genome sequence of the Borrelia valaisiana Tom 4006 and Borrelia afzelii Tom 3107 strains isolated from Ixodes persulcatus ticks in western Siberia.

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          Whole-genome sequences of Borrelia bissettii, Borrelia valaisiana, and Borrelia spielmanii.

          It has been known for decades that human Lyme disease is caused by the three spirochete species Borrelia burgdorferi, Borrelia afzelii, and Borrelia garinii. Recently, Borrelia valaisiana, Borrelia spielmanii, and Borrelia bissettii have been associated with Lyme disease. We report the complete genome sequences of B. valaisiana VS116, B. spielmanii A14S, and B. bissettii DN127.
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            Borrelia sinica sp. nov., a lyme disease-related Borrelia species isolated in China.

            A survey was performed for Lyme disease borrelia in the southern part of China, in Zhejiang, Sichuan and Anhui provinces, along the Yangtze River valley, in May of 1997 and 1998. Twenty isolates from Ixodes granulatus, Ixodes ovatus, Apodemus agrarius and Niviventer confucianus were obtained. These isolates were characterized by RFLP of the 5S-23S rDNA intergenic spacer, sequence analysis of the intergenic spacer, 16S rDNA and flagellin gene, DNA-DNA hybridization analysis, SDS-PAGE and Western blotting with mAbs. Six isolates from A. agrarius, five from I. granulatus collected in Zhejiang province and one from N. confucianus in Sichuan province were highly similar to strains 10MT and 5MT isolated in Korea and classified as Borrelia valaisiana. Four isolates from A. agrarius and I. granulatus collected in Zhejiang province generated unique RFLP patterns and phylogenetic analysis of the 16S rDNA and flagellin gene sequences suggested that the isolates should be classified as B. valaisiana. Furthermore, three isolates (CMN1a, CNM2, CMN3T) from N. confucianus captured in Sichuan province and one (CWO1) from I. ovatus in Anhui province showed lower 165 rDNA sequence similarity (less than 99.0%) to sequences of previously described Lyme disease-related Borrelia species. DNA-DNA hybridization results revealed that strains CMN3T and CMN1a were clearly distinct from all other known Lyme disease Borrelia species. Electron microscope observation showed the spirochaetes to be morphologically similar to those of Borrelia, but the cells contained only four periplasmic flagella inserted at each end of the spirochaetes. Based on these results, a new Borrelia species, Borrelia sinica sp. nov., is proposed. Strain CMN3T is the type strain of this new species.
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              Borrelia spirochetes in Russia: Genospecies differentiation by real-time PCR.

              Spirochetes of the Borrelia burgdorferi sensu lato complex are the causative agent of Lyme borreliosis which is widespread in Russia. Nowadays, three clinically important B. burgdorferi s.l. genospecies, B. afzelii, B. garinii, B. bavariensis sp. nov., can be found in Russia, as well as B. miyamotoi, which belongs to the tick-borne relapsing fever group of spirochetes. Several techniques have been developed to differentiate Borrelia genospecies. However, most of them do not allow detection of all of these genospecies simultaneously. Also, no method based on the RT-PCR TaqMan approach has been proposed to differentiate the genetically closely related species B. bavariensis and B. garinii. In the present paper, we investigated two species of ticks, I. persulcatus and I. pavlovskyi (1343 and 92 adults, respectively). Two sets of primers and probes for RT-PCR, with uvrA, glpQ and nifS genes as targets, were designed to detect four Borrelia genospecies in positive samples. The average prevalence of Borrelia sp. was about 40%, with B. afzelii as the most prevalent genospecies. Mixed infections of B. bavariensis and B. garinii were found to be extremely rare. While B. bavariensis was predominant in I. persulcatus, I. pavlovskyi ticks were infected exclusively by B. garinii. The proposed technique proved to be efficient in selection of individual Borrelia species for further genetic analysis, in particular, for multilocus sequence typing. Also, it could be applied for the differentiation of Borrelia genospecies in clinical material. Copyright © 2014 Elsevier GmbH. All rights reserved.
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                Author and article information

                Journal
                Genome Announc
                Genome Announc
                ga
                ga
                GA
                Genome Announcements
                American Society for Microbiology (1752 N St., N.W., Washington, DC )
                2169-8287
                24 December 2014
                Nov-Dec 2014
                : 2
                : 6
                : e01315-14
                Affiliations
                [a ]Institute of Chemical Biology and Fundamental Medicine SB RAS, Novosibirsk, Russia
                [b ]Virion Scientific Production Association (NPO Microgen), Tomsk, Russia
                [c ]JSC Vector-Best, Novosibirsk, Russia
                Author notes
                Address correspondence to Alexander M. Kurilshikov, alexa.kur@ 123456gmail.com .
                Author information
                http://orcid.org/0000-0003-2777-0833
                Article
                genomeA01315-14
                10.1128/genomeA.01315-14
                4276821
                25540343
                5c62d814-f681-45ff-a4f9-3fb39fa80831
                Copyright © 2014 Kurilshikov et al.

                This is an open-access article distributed under the terms of the Creative Commons Attribution 3.0 Unported license.

                History
                : 13 November 2014
                : 14 November 2014
                Page count
                Pages: 1
                Categories
                Prokaryotes
                Custom metadata
                November/December 2014
                free

                Genetics
                Genetics

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