title: Identification by polymerase chain reaction (PCR) of Marshallagia marshalli and Ostertagia gruehneri from Svalbard reindeer.
abstract: A polymerase chain reaction (PCR) assay to identify two common abomasal nematodes Marshallagia marshalli and Ostertagia gruehneri of Svalbard reindeer was developed. Species-specific PCR primers were designed from internal transcribed spacer (ITS)-2 sequences of rDNA and validated using morphologically identified adult male and female nematodes. Using the species-specific primers, a 110 bp fragment was amplified from M. marshalli and its minor morph Marshallagia occidentalis and a 149 bp fragment was amplified from Ostertagia gruehneri and its minor morph Ostertagia arctica. No PCR products were amplified from the third rare species, Teladorsagia circumcincta, or DNA from the reindeer host. The assay provides a useful tool to estimate species composition for both sexes in this nematode community.
authors.affiliation: NERC Molecular Genetics in Ecology Initiative, Department of Zoology, University of Aberdeen, Tillydrone Avenue, AB24 2TZ, Aberdeen, UK. j.dallas@abdn.ac.uk
authors.forename: J F
authors.initials: JF
authors.lastname: Dallas
authors.forename: R J
authors.initials: RJ
authors.lastname: Irvine
authors.forename: O
authors.initials: O
authors.lastname: Halvorsen
authors.forename: S D
authors.initials: SD
authors.lastname: Albon
mesh_terms: D000018:Abomasum / Q000469:parasitology; D000818:Animals; D001483:Base Sequence; D017931:DNA Primers / Q000737:chemistry; D018509:DNA, Helminth / Q000737:chemistry / Q000302:isolation & purification; D021903:DNA, Ribosomal Spacer / Q000737:chemistry; D005260:Female; D008297:Male; D008969:Molecular Sequence Data; D010028:Ostertagia / Q000737:chemistry / Q000235:genetics / Q000302:isolation & purification*; D010029:Ostertagiasis / Q000662:veterinary*; D016133:Polymerase Chain Reaction / Q000379:methods / Q000662:veterinary; D012053:Reindeer / Q000469:parasitology*; D016415:Sequence Alignment; D017422:Sequence Analysis, DNA; D012689:Sequence Homology, Nucleic Acid; D014251:Trichostrongyloidea / Q000737:chemistry / Q000235:genetics / Q000302:isolation & purification*; D014252:Trichostrongyloidiasis / Q000469:parasitology / Q000662:veterinary*
chemical_list: D017931:DNA Primers; D018509:DNA, Helminth; D021903:DNA, Ribosomal Spacer