Differentiation of three species of ixodid tick, Dermacentor andersoni, D. variabilis and D. albipictus, by PCR-based approaches using markers in ribosomal DNA.

Abstract:

:Three species of Dermacentor, Dermacentor albipictus, Dermacentor andersoni and Dermacentor variabilis, commonly occur in Canada. D. andersoni and D. variabilis are morphologically similar and are important vectors of human and animal pathogens. A practical polymerase chain reaction (PCR) assay, based on the amplification of part of the second internal transcribed spacer ribosomal DNA (pITS-2 rDNA), was developed to distinguish D. andersoni from D. variabilis. In addition, single-strand conformation polymorphism (SSCP) analysis of the pITS-2 rDNA provided a reliable method of distinguishing specimens of the three species of ixodid tick. PCR and pITS-2 SSCP were also used to determine whether there was hybridization between D. andersoni and D. variabilis at two localities in Saskatchewan where they occur in sympatry. These molecular tools will be useful for the unequivocal identification of D. andersoni and D. variabilis at all life cycle stages, which is essential for studies on their ecology and on the transmission of tick-borne diseases. Also, pITS-2 SSCP may be of potential use for discriminating among the other morphologically similar species within the genus Dermacentor.

journal_name

Mol Cell Probes

authors

Dergousoff SJ,Chilton NB

doi

10.1016/j.mcp.2007.04.003

subject

Has Abstract

pub_date

2007-10-01 00:00:00

pages

343-8

issue

5-6

eissn

0890-8508

issn

1096-1194

pii

S0890-8508(07)00032-1

journal_volume

21

pub_type

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