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Genetic markers for strongylid nematodes of livestock defined by PCR-based restriction analysis of spacer rDNA

Identifieur interne : 000F68 ( Istex/Corpus ); précédent : 000F67; suivant : 000F69

Genetic markers for strongylid nematodes of livestock defined by PCR-based restriction analysis of spacer rDNA

Auteurs : L. A Newton ; N. B Chilton ; I. Beveridge ; H. Hoste ; P. Nansen ; R. B Gasser

Source :

RBID : ISTEX:5321BECAD8BC24065B1F953F89E0E61A65178255

English descriptors

Abstract

Abstract: Twenty-four species of parasitic nematode (order Strongylida) from sheep, goats, cattle or pigs were characterised using a polymerase chain reaction-linked restriction fragment length polymorphism technique (PCR-RFLP). The ribosomal (r)DNA region spanning the first internal transcribed spacer (ITS-1), 5.8S rRNA gene and the second internal transcribed spacer (ITS-2) (designated ITS) was amplified from genomic DNA by polymerase chain reaction (PCR), digested separately with four restriction endonucleases (RsaI, HinfI, DraI or NlaIII) and the fragments separated by agarose gel electrophoresis. The PCR products amplified from all species appeared as a single band of ∼870 bp in size, except for Ostertagia ostertagi whose product was ∼1250 bp. The PCR-RFLP analysis of ITS revealed characteristic restriction patterns for all species, except for C. surnabada and C. oncophora which had identical patterns. The study demonstrated that ITS contains useful genetic markers for the identification of a range of strongylid nematodes of livestock. These markers should be of use in specific PCR assays for the identification of developmental stages of the parasites where morphological characters are unreliable.

Url:
DOI: 10.1016/S0001-706X(97)00105-8

Links to Exploration step

ISTEX:5321BECAD8BC24065B1F953F89E0E61A65178255

Le document en format XML

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<div type="abstract" xml:lang="en">Abstract: Twenty-four species of parasitic nematode (order Strongylida) from sheep, goats, cattle or pigs were characterised using a polymerase chain reaction-linked restriction fragment length polymorphism technique (PCR-RFLP). The ribosomal (r)DNA region spanning the first internal transcribed spacer (ITS-1), 5.8S rRNA gene and the second internal transcribed spacer (ITS-2) (designated ITS) was amplified from genomic DNA by polymerase chain reaction (PCR), digested separately with four restriction endonucleases (RsaI, HinfI, DraI or NlaIII) and the fragments separated by agarose gel electrophoresis. The PCR products amplified from all species appeared as a single band of ∼870 bp in size, except for Ostertagia ostertagi whose product was ∼1250 bp. The PCR-RFLP analysis of ITS revealed characteristic restriction patterns for all species, except for C. surnabada and C. oncophora which had identical patterns. The study demonstrated that ITS contains useful genetic markers for the identification of a range of strongylid nematodes of livestock. These markers should be of use in specific PCR assays for the identification of developmental stages of the parasites where morphological characters are unreliable.</div>
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<note type="content">Fig. 1: Gel showing ITS PCR products of Ostertagia erschowi (lane 1), O. leptospicularis (lane 2) and the ∼1250 bp product of O. ostertagi (lane 3). The ITS PCR products of all species examined in this study, except O. ostertagi, were ∼870 bp in size.</note>
<note type="content">Fig. 2: Example of an agarose gel showing a lack of variation in the ITS restriction patterns (using endonucleases HinfI and RsaI) among different samples of Haemonchus contortus (Hc9, Hc10, Hc13, Hc15, Hc16, Hc17, Hc21, Hc22, Hc24, Hc26, Hc31 and Hc33, lanes 1–12, respectively). ΦX174-HaeIII molecular weight markers (Promega) represented with m.</note>
<note type="content">Fig. 3: Examples of the PCR-RFLP analysis of ITS rDNA with the endonucleases RsaI and NlaIII showing interspecific differences in restriction patterns. Lanes: Teladorsagia circumcincta (1); Ostertagia ostertagi (2); O. leptospicularis (3); O. erschowi (4); Hyostrongylus rubidus (5); Oesophagostomum radiatum (6); Oe. venulosum (7); Oe. columbianum (8); Oe. dentatum (9); Oe. quadrispinulatum (10); Nematodirus spathiger (11); N. filicollis (12); N. helvetianus (13); and N. battus (14). Ordinate values indicate approximate molecular weight in base pairs. A mix of ΦX174-HaeIII and pGEM™ molecular weight markers (Promega) represented with M.</note>
<note type="content">Fig. 4: Schematic representation of the ITS rDNA restriction patterns produced for 24 species of strongylid nematodes of livestock (sheep/goat, cattle or pig). Individual boxes contain patterns produced for restriction endonucleases DraI, NlaIII, HinfI and RsaI. Molecular weights in bp (left). Size of undigested PCR products was ∼870 bp for all species except O. ostertagi (∼1250 bp). Cooperia oncophora and C. surnabada. (represented by C) could not be differentiated by their restriction pattern using any of the four endonucleases. Restriction patterns that were representative for multiple species are designated with `G': G1: Haemonchus contortus, Nematodirus battus, N. filicollis, N. spathiger, Oesophagostomum columbianum and Chabertia ovina. G2: Trichostrongylus axei, T. colubriformis and T. vitrinus. G3: T. axei and T. colubriformis. G4: T. axei and T. vitrinus. G5: N. spathiger and N. helvetianus. G6: Oesophagostomum dentatum and Oe. quadrispinulatum. G7: Haemonchus placei, N. helvetianus and N. spathiger. G8: Cooperia oncophora, C. surnabada and C. punctata. ΦX174-HaeIII molecular weight markers (Promega) represented with m.</note>
<note type="content">Table 1: Parasite material</note>
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<ce:simple-para view="all" id="simple-para.0040">Twenty-four species of parasitic nematode (order Strongylida) from sheep, goats, cattle or pigs were characterised using a polymerase chain reaction-linked restriction fragment length polymorphism technique (PCR-RFLP). The ribosomal (r)DNA region spanning the first internal transcribed spacer (ITS-1), 5.8S rRNA gene and the second internal transcribed spacer (ITS-2) (designated ITS) was amplified from genomic DNA by polymerase chain reaction (PCR), digested separately with four restriction endonucleases (
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and
<ce:italic>C. oncophora</ce:italic>
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<abstract lang="en">Abstract: Twenty-four species of parasitic nematode (order Strongylida) from sheep, goats, cattle or pigs were characterised using a polymerase chain reaction-linked restriction fragment length polymorphism technique (PCR-RFLP). The ribosomal (r)DNA region spanning the first internal transcribed spacer (ITS-1), 5.8S rRNA gene and the second internal transcribed spacer (ITS-2) (designated ITS) was amplified from genomic DNA by polymerase chain reaction (PCR), digested separately with four restriction endonucleases (RsaI, HinfI, DraI or NlaIII) and the fragments separated by agarose gel electrophoresis. The PCR products amplified from all species appeared as a single band of ∼870 bp in size, except for Ostertagia ostertagi whose product was ∼1250 bp. The PCR-RFLP analysis of ITS revealed characteristic restriction patterns for all species, except for C. surnabada and C. oncophora which had identical patterns. The study demonstrated that ITS contains useful genetic markers for the identification of a range of strongylid nematodes of livestock. These markers should be of use in specific PCR assays for the identification of developmental stages of the parasites where morphological characters are unreliable.</abstract>
<note type="content">Fig. 1: Gel showing ITS PCR products of Ostertagia erschowi (lane 1), O. leptospicularis (lane 2) and the ∼1250 bp product of O. ostertagi (lane 3). The ITS PCR products of all species examined in this study, except O. ostertagi, were ∼870 bp in size.</note>
<note type="content">Fig. 2: Example of an agarose gel showing a lack of variation in the ITS restriction patterns (using endonucleases HinfI and RsaI) among different samples of Haemonchus contortus (Hc9, Hc10, Hc13, Hc15, Hc16, Hc17, Hc21, Hc22, Hc24, Hc26, Hc31 and Hc33, lanes 1–12, respectively). ΦX174-HaeIII molecular weight markers (Promega) represented with m.</note>
<note type="content">Fig. 3: Examples of the PCR-RFLP analysis of ITS rDNA with the endonucleases RsaI and NlaIII showing interspecific differences in restriction patterns. Lanes: Teladorsagia circumcincta (1); Ostertagia ostertagi (2); O. leptospicularis (3); O. erschowi (4); Hyostrongylus rubidus (5); Oesophagostomum radiatum (6); Oe. venulosum (7); Oe. columbianum (8); Oe. dentatum (9); Oe. quadrispinulatum (10); Nematodirus spathiger (11); N. filicollis (12); N. helvetianus (13); and N. battus (14). Ordinate values indicate approximate molecular weight in base pairs. A mix of ΦX174-HaeIII and pGEM™ molecular weight markers (Promega) represented with M.</note>
<note type="content">Fig. 4: Schematic representation of the ITS rDNA restriction patterns produced for 24 species of strongylid nematodes of livestock (sheep/goat, cattle or pig). Individual boxes contain patterns produced for restriction endonucleases DraI, NlaIII, HinfI and RsaI. Molecular weights in bp (left). Size of undigested PCR products was ∼870 bp for all species except O. ostertagi (∼1250 bp). Cooperia oncophora and C. surnabada. (represented by C) could not be differentiated by their restriction pattern using any of the four endonucleases. Restriction patterns that were representative for multiple species are designated with `G': G1: Haemonchus contortus, Nematodirus battus, N. filicollis, N. spathiger, Oesophagostomum columbianum and Chabertia ovina. G2: Trichostrongylus axei, T. colubriformis and T. vitrinus. G3: T. axei and T. colubriformis. G4: T. axei and T. vitrinus. G5: N. spathiger and N. helvetianus. G6: Oesophagostomum dentatum and Oe. quadrispinulatum. G7: Haemonchus placei, N. helvetianus and N. spathiger. G8: Cooperia oncophora, C. surnabada and C. punctata. ΦX174-HaeIII molecular weight markers (Promega) represented with m.</note>
<note type="content">Table 1: Parasite material</note>
<subject lang="en">
<genre>Keywords</genre>
<topic>Ribosomal DNA</topic>
<topic>Internal transcribed spacers</topic>
<topic>PCR-RFLP</topic>
<topic>Genetic markers</topic>
<topic>Species identification</topic>
<topic>Parasitic nematodes of livestock</topic>
</subject>
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<dateIssued encoding="w3cdtf">199803</dateIssued>
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<identifier type="ISSN">0001-706X</identifier>
<identifier type="PII">S0001-706X(00)X0033-2</identifier>
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<identifier type="DOI">10.1016/S0001-706X(97)00105-8</identifier>
<identifier type="PII">S0001-706X(97)00105-8</identifier>
<identifier type="ArticleID">752</identifier>
<accessCondition type="use and reproduction" contentType="copyright">©1998 Elsevier Science B.V.</accessCondition>
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