The value of circulating eosinophil count as a selection criteria for resistance of sheep to trichostrongyle parasites
In merino sheep bred for either increased or decreased resistance to Haemonchus contortus, faecal worm egg counts (FEC) were lower in the resistant line (6,831 vs 17,645 epg, P < 0.01), and circulating eosinophils (EOS) were higher, but not significantly so (3.40 x 10(4) ml(-1) vs 1.40 x 10(4) ml...
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| Veröffentlicht in: | International journal for parasitology 1996-01, Vol.26 (1), p.123-126 |
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| container_title | International journal for parasitology |
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| creator | Woolaston, R R Manueli, P Eady, S J Barger, I A Le Jambre, L F Banks, D J Windon, R G |
| description | In merino sheep bred for either increased or decreased resistance to Haemonchus contortus, faecal worm egg counts (FEC) were lower in the resistant line (6,831 vs 17,645 epg, P < 0.01), and circulating eosinophils (EOS) were higher, but not significantly so (3.40 x 10(4) ml(-1) vs 1.40 x 10(4) ml(-1), P = 0.1 1). Another flock was artificially infected with Trichostrongylus colubriformis and significant genetic variation was found in both FEC (heritability 0.40 +/- 0.11) and EOS (0.19 +/- 0.08). In a third flock comprising tropical sheep breeds, a natural challenge with T. colubriformis resulted in significant sire effects on FEC (heritability 0.20 +/- 0.10) but not EOS (heritability inestimable). We conclude that EOS offers no advantage over FEC as it selection criterion for resistance. |
| format | Article |
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Another flock was artificially infected with Trichostrongylus colubriformis and significant genetic variation was found in both FEC (heritability 0.40 +/- 0.11) and EOS (0.19 +/- 0.08). In a third flock comprising tropical sheep breeds, a natural challenge with T. colubriformis resulted in significant sire effects on FEC (heritability 0.20 +/- 0.10) but not EOS (heritability inestimable). We conclude that EOS offers no advantage over FEC as it selection criterion for resistance.</description><identifier>ISSN: 0020-7519</identifier><identifier>PMID: 9198588</identifier><language>eng</language><publisher>England</publisher><subject>Analysis of Variance ; Animals ; Eosinophils ; Female ; Haemonchiasis - genetics ; Haemonchiasis - immunology ; Haemonchiasis - veterinary ; Immunity, Innate - genetics ; Leukocyte Count ; Male ; Parasite Egg Count ; Predictive Value of Tests ; Selection, Genetic ; Sheep ; Sheep Diseases - genetics ; Sheep Diseases - immunology ; Trichostrongyloidiasis - genetics ; Trichostrongyloidiasis - immunology ; Trichostrongyloidiasis - veterinary ; Trichostrongylosis - genetics ; Trichostrongylosis - immunology ; Trichostrongylosis - veterinary</subject><ispartof>International journal for parasitology, 1996-01, Vol.26 (1), p.123-126</ispartof><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/9198588$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Woolaston, R R</creatorcontrib><creatorcontrib>Manueli, P</creatorcontrib><creatorcontrib>Eady, S J</creatorcontrib><creatorcontrib>Barger, I A</creatorcontrib><creatorcontrib>Le Jambre, L F</creatorcontrib><creatorcontrib>Banks, D J</creatorcontrib><creatorcontrib>Windon, R G</creatorcontrib><title>The value of circulating eosinophil count as a selection criteria for resistance of sheep to trichostrongyle parasites</title><title>International journal for parasitology</title><addtitle>Int J Parasitol</addtitle><description>In merino sheep bred for either increased or decreased resistance to Haemonchus contortus, faecal worm egg counts (FEC) were lower in the resistant line (6,831 vs 17,645 epg, P < 0.01), and circulating eosinophils (EOS) were higher, but not significantly so (3.40 x 10(4) ml(-1) vs 1.40 x 10(4) ml(-1), P = 0.1 1). Another flock was artificially infected with Trichostrongylus colubriformis and significant genetic variation was found in both FEC (heritability 0.40 +/- 0.11) and EOS (0.19 +/- 0.08). In a third flock comprising tropical sheep breeds, a natural challenge with T. colubriformis resulted in significant sire effects on FEC (heritability 0.20 +/- 0.10) but not EOS (heritability inestimable). We conclude that EOS offers no advantage over FEC as it selection criterion for resistance.</description><subject>Analysis of Variance</subject><subject>Animals</subject><subject>Eosinophils</subject><subject>Female</subject><subject>Haemonchiasis - genetics</subject><subject>Haemonchiasis - immunology</subject><subject>Haemonchiasis - veterinary</subject><subject>Immunity, Innate - genetics</subject><subject>Leukocyte Count</subject><subject>Male</subject><subject>Parasite Egg Count</subject><subject>Predictive Value of Tests</subject><subject>Selection, Genetic</subject><subject>Sheep</subject><subject>Sheep Diseases - genetics</subject><subject>Sheep Diseases - immunology</subject><subject>Trichostrongyloidiasis - genetics</subject><subject>Trichostrongyloidiasis - immunology</subject><subject>Trichostrongyloidiasis - veterinary</subject><subject>Trichostrongylosis - genetics</subject><subject>Trichostrongylosis - immunology</subject><subject>Trichostrongylosis - veterinary</subject><issn>0020-7519</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1996</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNotkL1qwzAURj20pGnaRyho6maQLdmRxhL6B4Eu2c31zXWsokiurhzI2ze0mb7lfGc4N8VSylqW66ayd8U987eUVaO0XhQLW1nTGLMsTruRxAn8TCIOAl3C2UN24SAosgtxGp0XGOeQBbAAweQJs4tBYHKZkgMxxCQSseMMAf80PBJNIkeRk8Mxck4xHM6exAQJ-HLjh-J2AM_0eN1VsXt73W0-yu3X--fmZVtOjTJlpZUBMm1LgKaXg7bSqhqtVMO-V6Bs1ZOmujZYY7tHi0ZrVQPJvm-VsqBWxfO_dkrxZybO3dExkvcQKM7crY2s2rU1F_DpCs79kfbdlNwR0rm7dlK_2xdl_w</recordid><startdate>199601</startdate><enddate>199601</enddate><creator>Woolaston, R R</creator><creator>Manueli, P</creator><creator>Eady, S J</creator><creator>Barger, I A</creator><creator>Le Jambre, L F</creator><creator>Banks, D J</creator><creator>Windon, R G</creator><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>7X8</scope></search><sort><creationdate>199601</creationdate><title>The value of circulating eosinophil count as a selection criteria for resistance of sheep to trichostrongyle parasites</title><author>Woolaston, R R ; Manueli, P ; Eady, S J ; Barger, I A ; Le Jambre, L F ; Banks, D J ; Windon, R G</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-p538-1438ae866eac8b0f490932c903fdb3a391be4e228c2c6dc9c84432ae0bb6339a3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1996</creationdate><topic>Analysis of Variance</topic><topic>Animals</topic><topic>Eosinophils</topic><topic>Female</topic><topic>Haemonchiasis - genetics</topic><topic>Haemonchiasis - immunology</topic><topic>Haemonchiasis - veterinary</topic><topic>Immunity, Innate - genetics</topic><topic>Leukocyte Count</topic><topic>Male</topic><topic>Parasite Egg Count</topic><topic>Predictive Value of Tests</topic><topic>Selection, Genetic</topic><topic>Sheep</topic><topic>Sheep Diseases - genetics</topic><topic>Sheep Diseases - immunology</topic><topic>Trichostrongyloidiasis - genetics</topic><topic>Trichostrongyloidiasis - immunology</topic><topic>Trichostrongyloidiasis - veterinary</topic><topic>Trichostrongylosis - genetics</topic><topic>Trichostrongylosis - immunology</topic><topic>Trichostrongylosis - veterinary</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Woolaston, R R</creatorcontrib><creatorcontrib>Manueli, P</creatorcontrib><creatorcontrib>Eady, S J</creatorcontrib><creatorcontrib>Barger, I A</creatorcontrib><creatorcontrib>Le Jambre, L F</creatorcontrib><creatorcontrib>Banks, D J</creatorcontrib><creatorcontrib>Windon, R G</creatorcontrib><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>MEDLINE - Academic</collection><jtitle>International journal for parasitology</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Woolaston, R R</au><au>Manueli, P</au><au>Eady, S J</au><au>Barger, I A</au><au>Le Jambre, L F</au><au>Banks, D J</au><au>Windon, R G</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>The value of circulating eosinophil count as a selection criteria for resistance of sheep to trichostrongyle parasites</atitle><jtitle>International journal for parasitology</jtitle><addtitle>Int J Parasitol</addtitle><date>1996-01</date><risdate>1996</risdate><volume>26</volume><issue>1</issue><spage>123</spage><epage>126</epage><pages>123-126</pages><issn>0020-7519</issn><abstract>In merino sheep bred for either increased or decreased resistance to Haemonchus contortus, faecal worm egg counts (FEC) were lower in the resistant line (6,831 vs 17,645 epg, P < 0.01), and circulating eosinophils (EOS) were higher, but not significantly so (3.40 x 10(4) ml(-1) vs 1.40 x 10(4) ml(-1), P = 0.1 1). Another flock was artificially infected with Trichostrongylus colubriformis and significant genetic variation was found in both FEC (heritability 0.40 +/- 0.11) and EOS (0.19 +/- 0.08). In a third flock comprising tropical sheep breeds, a natural challenge with T. colubriformis resulted in significant sire effects on FEC (heritability 0.20 +/- 0.10) but not EOS (heritability inestimable). We conclude that EOS offers no advantage over FEC as it selection criterion for resistance.</abstract><cop>England</cop><pmid>9198588</pmid><tpages>4</tpages></addata></record> |
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| ispartof | International journal for parasitology, 1996-01, Vol.26 (1), p.123-126 |
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| language | eng |
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| source | MEDLINE; ScienceDirect Journals (5 years ago - present) |
| subjects | Analysis of Variance Animals Eosinophils Female Haemonchiasis - genetics Haemonchiasis - immunology Haemonchiasis - veterinary Immunity, Innate - genetics Leukocyte Count Male Parasite Egg Count Predictive Value of Tests Selection, Genetic Sheep Sheep Diseases - genetics Sheep Diseases - immunology Trichostrongyloidiasis - genetics Trichostrongyloidiasis - immunology Trichostrongyloidiasis - veterinary Trichostrongylosis - genetics Trichostrongylosis - immunology Trichostrongylosis - veterinary |
| title | The value of circulating eosinophil count as a selection criteria for resistance of sheep to trichostrongyle parasites |
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