Journal
EXPERIMENTAL AND APPLIED ACAROLOGY
Volume 48, Issue 4, Pages 329-344Publisher
SPRINGER
DOI: 10.1007/s10493-009-9244-4
Keywords
Ixodes granulatus; Tick; Mitochondrial 16S gene; Borrelia burgdorferi; Taiwan
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Funding
- National Science Council Taipei, Taiwan, Republic of China [NSC96-2314-B-016-025-MY3]
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The genetic identity of Ixodes granulatus ticks was determined for the first time in Taiwan. The phylogenetic relationships were analyzed by comparing the sequences of mitochondrial 16S ribosomal DNA gene obtained from 19 strains of ticks representing seven species of Ixodes and two outgroup species (Rhipicephalus sanguineus and Haemaphysalis inermis). Four major clades could be easily distinguished by neighbour-joining analysis and were congruent by maximum-parsimony method. All these I. granulatus ticks of Taiwan were genetically affiliated to a monophyletic group with highly homogeneous sequences (92.2-99.3% similarity), and can be discriminated from other Ixodes species and other genera of ticks with a sequence divergence ranging from 11.7 to 30.8%. Moreover, intraspecific analysis revealed that two distinct lineages are evident between the same species of I. granulatus ticks collected from Taiwan and Malaysia. Our results demonstrate that all these I. granulatus ticks of Taiwan represent a unique lineage distinct from the common vector ticks (I. ricinus complex) for Borrelia burgdorferi spirochetes.
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