{"id":2674,"date":"2021-10-05T18:19:39","date_gmt":"2021-10-05T16:19:39","guid":{"rendered":"https:\/\/tollertales.nl\/?page_id=2674"},"modified":"2025-12-06T23:05:23","modified_gmt":"2025-12-06T22:05:23","slug":"prcd-pra","status":"publish","type":"page","link":"https:\/\/tollertales.nl\/index.php\/prcd-pra\/","title":{"rendered":"Prcd-PRA"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-page\" data-elementor-id=\"2674\" class=\"elementor elementor-2674\" data-elementor-post-type=\"page\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-49b11a2f elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"49b11a2f\" data-element_type=\"section\" data-e-type=\"section\" data-settings=\"{&quot;shape_divider_bottom&quot;:&quot;curve&quot;,&quot;shape_divider_bottom_negative&quot;:&quot;yes&quot;}\">\n\t\t\t\t\t\t\t<div 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width=\"768\" height=\"177\" src=\"https:\/\/tollertales.nl\/wp-content\/uploads\/2021\/09\/header-3a-768x177.png\" class=\"attachment-medium_large size-medium_large wp-image-1799\" alt=\"\" srcset=\"https:\/\/tollertales.nl\/wp-content\/uploads\/2021\/09\/header-3a-768x177.png 768w, https:\/\/tollertales.nl\/wp-content\/uploads\/2021\/09\/header-3a-300x69.png 300w, https:\/\/tollertales.nl\/wp-content\/uploads\/2021\/09\/header-3a.png 909w\" sizes=\"(max-width: 768px) 100vw, 768px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-33 elementor-top-column elementor-element elementor-element-70fcada2\" data-id=\"70fcada2\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap\">\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-32f1fe53 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"32f1fe53\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-60ac200e\" data-id=\"60ac200e\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-3a989049 elementor-widget elementor-widget-text-editor\" data-id=\"3a989049\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h3>Prcd-PRA en informatie DNA test<\/h3><div>\u00a0<\/div><table cellspacing=\"0\" cellpadding=\"5\"><tbody><tr style=\"background-color: #d9ddd8;\"><td>Wilt u meer informatie over dit onderwerp of over de DNA test, dan kunt u terecht bij de fokaangelegenhedencommisssie.<\/td><\/tr><\/tbody><\/table><h3>PRA<\/h3><p>PRA is de afkorting van Progressieve Retina Atrofie, het is een oogafwijking die in verschillende vormen bij meerdere rassen voor kan komen. Bij de Toller komt de prcd-PRA vorm voor. <br \/>Prcd-PRA staat voor progressieve rod-cone degeneratie, oftewel progressieve degeneratie van de netvliesstaafjes. Prcd-PRA is erfelijk en daarom worden Tollers, waarmee men wil fokken, daar middels de DNA test en middels klinisch onderzoek (ECVO) op onderzocht.<\/p><p>PRA is het verval van zintuigweefsel van het netvlies (de retina) de omvangafname (atrofie) is progressief, wat inhoud dat er steeds meer weefsel komt te vervallen waardoor de hond uiteindelijk blind wordt. Dit verval kan pas op latere leeftijd intreden en de mogelijkheid bestaat dat de lijder aan deze oogafwijking er tijdens haar of zijn leven nooit tekenen van vertoont.<\/p><h3>DNA test<\/h3><p>Het is sinds 2002 mogelijk om de Toller via DNA te testen op prcd-PRA. Dat kan via diverse laboratoria. Wij raden aan dit via CombiBreed te laten doen, dit kan als losse test of als onderdeel van het raspakket <a href=\"https:\/\/www.combibreed.nl\/combibreed-nova-scotia-duck-tolling-retriever-den\/\" target=\"_blank\" rel=\"noopener\">H656<\/a>.<\/p><h3>De uitslag<\/h3><p>De uitslag kan bestaan uit drie mogelijkheden:<br \/>&#8211; Normal\/vrij = de betreffende hond is vrij van PRA.<br \/>&#8211; Carrier\/drager = de betreffende hond is drager van het gen maar lijdt er zelf niet aan.<br \/>&#8211; Affected\/lijder = de betreffende hond is lijder.<\/p><p><em>Note: laboratoria kunnen de uitslag op verschillende manieren omschrijven. Bij de uitslag staat altijd een &#8216;interpretation&#8217; van de betreffende uitslag.<br \/><\/em><\/p><h3>Verwachtte resultaat in de fokkerij en strategie voor erfelijke recessieve afwijkingen<\/h3><p>Onderstaande tabel duidt aan welke combinaties aangeraden worden. Op zijn minst moet \u00e9\u00e9n van beide ouders &#8220;NORMAL\/VRIJ&#8221; zijn getest.<\/p><p>In het VFR is opgenomen: <em>&#8220;vrij door vererving ouders tot maximaal 1 generatie is toegestaan&#8221;<\/em> omdat -logisch geredeneerd- testen soms fout gaan en mutaties niet uit te sluiten zijn, dus willen we dat voorkomen dan moeten we regelmatig checken, vandaar de toevoeging \u2018vrij uit geboorte tot maximaal 1 generatie\u2019. Tevens sluit dit aan bij het internationale advies in deze.<\/p><table cellspacing=\"0\" cellpadding=\"5\"><tbody style=\"background-color: #d9ddd8;\"><tr><td>\u00a0<\/td><td colspan=\"3\">Ouder 2 Genotype<\/td><\/tr><tr><td>Ouder 1 Genotype<\/td><td>Normal\/vrij<\/td><td>Carrier\/drager<\/td><td>Affected\/lijder<\/td><\/tr><tr><td>Normal\/vrij<\/td><td>Alle = Normal\/vrij<\/td><td>1\/2 = Normal\/vrij<br \/>1\/2 = Carrier\/drager<\/td><td>Alle = Carrier\/drager<\/td><\/tr><tr><td>Carrier\/drager<\/td><td>1\/2 = Normal\/vrij<br \/>1\/2 = Carrier\/drager<\/td><td>1\/4 = Normal\/vrij<br \/>1\/2 = Carrier\/drager<br \/>1\/4 = Affected\/lijder<\/td><td>1\/2 = Carrier\/drager<br \/>1\/2 = Affected\/lijder<\/td><\/tr><tr><td>Affected\/lijder<\/td><td>Alle = Carrier\/drager<\/td><td>1\/2 = Carrier\/drager<br \/>1\/2 = Affected\/lijder<\/td><td>Alle = Affected\/lijder<\/td><\/tr><\/tbody><\/table><p>Wangslijm of bloedmonsters voor DNA testen kunnen via de volgende laboratoria worden verwerkt.<\/p><p><a href=\"https:\/\/www.combibreed.com\/nl-nl\/Webshop\/DNA-Tests\/Hond\" target=\"_blank\" rel=\"noopener\">CombiBreed (VHL)<\/a><br \/><a href=\"http:\/\/nl.laboklin.info\/genetica\/\" target=\"_blank\" rel=\"noopener\">Laboklin<\/a><br \/><br \/>Zie ook&#8230;<br \/><a href=\"https:\/\/nieuw.tollertales.nl\/index.php\/uitslagen-pra-cea\/\" target=\"_blank\" rel=\"noopener\">PRA-CEA uitslagen<\/a><\/p><p>Zie ook wetenschappelijke publicaties<\/p><p><a href=\"https:\/\/www.sciencedirect.com\/science\/article\/pii\/S0888754306001716\" target=\"_blank\" rel=\"noopener\">Progressive rod-cone degeneration<\/a><\/p><div>\u00a0<\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Prcd-PRA en informatie DNA test \u00a0 Wilt u meer informatie over dit onderwerp of over de DNA test, dan kunt u terecht bij de fokaangelegenhedencommisssie. PRA PRA is de afkorting van Progressieve Retina Atrofie, het is een oogafwijking die in verschillende vormen bij meerdere rassen voor kan komen. Bij de Toller komt de prcd-PRA vorm [&hellip;]<\/p>\n","protected":false},"author":7,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"elementor_header_footer","meta":{"site-sidebar-layout":"no-sidebar","site-content-layout":"page-builder","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"disabled","ast-breadcrumbs-content":"","ast-featured-img":"disabled","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"class_list":["post-2674","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/tollertales.nl\/index.php\/wp-json\/wp\/v2\/pages\/2674","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/tollertales.nl\/index.php\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/tollertales.nl\/index.php\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/tollertales.nl\/index.php\/wp-json\/wp\/v2\/users\/7"}],"replies":[{"embeddable":true,"href":"https:\/\/tollertales.nl\/index.php\/wp-json\/wp\/v2\/comments?post=2674"}],"version-history":[{"count":19,"href":"https:\/\/tollertales.nl\/index.php\/wp-json\/wp\/v2\/pages\/2674\/revisions"}],"predecessor-version":[{"id":18813,"href":"https:\/\/tollertales.nl\/index.php\/wp-json\/wp\/v2\/pages\/2674\/revisions\/18813"}],"wp:attachment":[{"href":"https:\/\/tollertales.nl\/index.php\/wp-json\/wp\/v2\/media?parent=2674"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}