{"id":56508,"date":"2019-01-11T00:00:32","date_gmt":"2019-01-11T00:00:32","guid":{"rendered":"https:\/\/www.zinpro.com\/heat-stress-performance-trace-minerals-swine-gut-health\/"},"modified":"2023-08-16T12:10:33","modified_gmt":"2023-08-16T17:10:33","slug":"heat-stress-performance-trace-minerals-swine-gut-health","status":"publish","type":"post","link":"https:\/\/www.zinpro.com\/fr\/resource-center\/blog\/heat-stress-performance-trace-minerals-swine-gut-health\/","title":{"rendered":"Stress thermique, oligo-\u00e9l\u00e9ments de performance et sant\u00e9 intestinale des porcs"},"content":{"rendered":"<p>Le stress thermique peut entra\u00eener des co\u00fbts \u00e9conomiques importants pour votre exploitation d'\u00e9levage. Par exemple, on estime que le co\u00fbt annuel du stress thermique dans l'industrie porcine am\u00e9ricaine est de $900 millions (Pollmann, 2013). Sur ce montant, environ $450 millions concernent la phase de croissance-finition et environ $450 millions concernent le troupeau reproducteur.<\/p>\n\n\n\n<p>Sur la base de ces estimations, il n'est pas surprenant que les investissements dans les syst\u00e8mes de refroidissement \u00e0 la ferme soient tr\u00e8s r\u00e9pandus. Cependant, les syst\u00e8mes de refroidissement ne sont pas toujours \u00e9conomiquement viables et les d\u00e9faillances m\u00e9caniques peuvent provoquer des \u00e9pisodes de stress thermique non planifi\u00e9s.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-heat-stress-what-s-happening-inside-the-animal\">Stress thermique : Que se passe-t-il \u00e0 l'int\u00e9rieur de l'animal ?<\/h3>\n\n\n\n<p>Lorsqu'un animal subit un stress thermique, la temp\u00e9rature centrale de son corps augmente, ce qui entra\u00eene un d\u00e9tournement du flux sanguin du tissu visc\u00e9ral (tissu qui tapisse les vaisseaux sanguins, l'estomac, le tube digestif et d'autres organes internes) vers la surface de la peau afin d'augmenter la dissipation de la chaleur. La r\u00e9duction du flux sanguin vers le tissu visc\u00e9ral entra\u00eene une diminution de la quantit\u00e9 d'oxyg\u00e8ne (hypoxie) et d'\u00e9nergie disponible pour les ent\u00e9rocytes (couche unique de cellules \u00e9pith\u00e9liales) qui tapissent le tractus intestinal. Dans ce cas, les jonctions serr\u00e9es qui maintiennent les ent\u00e9rocytes ensemble peuvent s'affaiblir, ce qui permet aux agents pathog\u00e8nes et \u00e0 leurs toxines de passer dans la circulation sanguine, entra\u00eenant en fin de compte un \u00e9tat appel\u00e9 \"intestin perm\u00e9able\".<\/p>\n\n\n\n<p>Lorsque le stress thermique appara\u00eet, nous savons que les animaux subissent souvent une r\u00e9duction marqu\u00e9e de leur consommation d'aliments, ce qui a \u00e9t\u00e9 consid\u00e9r\u00e9 comme un m\u00e9canisme permettant de r\u00e9duire la chaleur m\u00e9tabolique. Bien qu'elle contribue largement \u00e0 la perte de performance en cas de stress thermique, cette r\u00e9duction de l'apport alimentaire n'explique que partiellement la baisse de performance des animaux soumis \u00e0 un stress thermique.<\/p>\n\n\n\n<p>En outre, la respiration plus rapide des animaux qui tentent de se refroidir entra\u00eene la production de radicaux libres oxyg\u00e9n\u00e9s et azot\u00e9s, qui peuvent affaiblir ou d\u00e9truire les jonctions serr\u00e9es de l'intestin. Un stress thermique important peut entra\u00eener des changements morphologiques dans l'intestin, tels qu'une diminution de la hauteur et de la largeur des villosit\u00e9s intestinales et, \u00e9ventuellement, une rupture des jonctions serr\u00e9es des ent\u00e9rocytes. L'intestin peut devenir vuln\u00e9rable au transfert de lipopolysaccharides (LPS), ou endotoxines, \u00e0 travers la paroi intestinale et dans la circulation, provoquant une activation du syst\u00e8me immunitaire.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"http:\/\/www.zinpro.com\/wp-content\/uploads\/2023\/06\/Heat-Stress2-1024x317.png\" alt=\"\" class=\"wp-image-14892\"\/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-zinc-a-key-trace-mineral-for-tight-junctions\">Zinc : un oligo-\u00e9l\u00e9ment cl\u00e9 pour les jonctions serr\u00e9es<\/h3>\n\n\n\n<p>Plusieurs \u00e9tudes de recherche ont \u00e9tabli que la <a href=\"https:\/\/www.zinpro.com\/fr\/performance-solutions\/we-know-trace-minerals\/\" target=\"_blank\" rel=\"noopener\">oligo-\u00e9l\u00e9ment zinc<\/a> joue un r\u00f4le cl\u00e9 dans le maintien de l'int\u00e9grit\u00e9 intestinale en renfor\u00e7ant les jonctions serr\u00e9es pendant les \u00e9preuves. La recherche a montr\u00e9 que le zinc augmente la r\u00e9gulation des prot\u00e9ines de la jonction serr\u00e9e et des prot\u00e9ines de choc thermique. En outre, le zinc est un antioxydant, et le stress oxydatif peut jouer un r\u00f4le cl\u00e9 dans l'apparition des fuites intestinales. La recherche a \u00e9galement montr\u00e9 que la forme du zinc consomm\u00e9 influe sur son efficacit\u00e9 \u00e0 r\u00e9duire les fuites intestinales.<\/p>\n\n\n\n<p>L'universit\u00e9 d'\u00c9tat de l'Iowa a men\u00e9 une \u00e9tude pour d\u00e9montrer comment les conditions de stress thermique aigu\u00ebs contribuent aux fuites intestinales. Les r\u00e9sultats ont montr\u00e9 que l'alimentation en oligo-\u00e9l\u00e9ments de performance tels que <a href=\"https:\/\/www.zinpro.com\/fr\/products\/availa-mins\/availa-zn\/\" target=\"_blank\" rel=\"noreferrer noopener\">Availa<sup>\u00ae<\/sup> Zn<\/a> aide \u00e0 r\u00e9duire l'apparition de fuites intestinales en am\u00e9liorant la viabilit\u00e9 et l'int\u00e9grit\u00e9 du syst\u00e8me intestinal.<\/p>\n\n\n\n<p>Dans cette \u00e9tude, trente-deux porcs crois\u00e9s d'un poids initial de 63 kg (140 livres) ont \u00e9t\u00e9 r\u00e9partis au hasard dans l'un des quatre traitements :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Traitement 1 (contr\u00f4le thermo-neutre) : <\/strong>120 ppm de sulfate de zinc aliment\u00e9 dans des conditions thermo-neutres (21\u00b0C ; 70% humidit\u00e9) ; <em>ad libitum<\/em> la consommation d'aliments.<\/li>\n\n\n\n<li><strong>Traitement 2 (contr\u00f4le thermo-neutre restreint en nutriments) : <\/strong>120 ppm de sulfate de zinc dans des conditions thermo-neutres (21\u00b0C ; 70% d'humidit\u00e9) ; restriction de l'apport alimentaire. Les animaux de ce traitement ont \u00e9t\u00e9 autoris\u00e9s \u00e0 consommer la m\u00eame quantit\u00e9 d'aliments que les deux r\u00e9gimes de stress thermique (traitements 3 et 4, 17% d'humidit\u00e9). <em>ad libitum<\/em> l'ingestion d'aliments), ce qui permet d'effectuer des comparaisons dans un environnement contr\u00f4l\u00e9.<\/li>\n\n\n\n<li><strong>Traitement 3 (lutte contre le stress thermique) : <\/strong>120 ppm de sulfate de zinc dans des conditions de stress thermique aigu (37\u00b0C, 40% d'humidit\u00e9) ; <em>ad libitum<\/em> la consommation d'aliments.<\/li>\n\n\n\n<li><strong>Traitement 4 (stress thermique Availa Zn) : <\/strong>120 ppm de zinc total (60 ppm de zinc provenant d'Availa Zn et 60 ppm de sulfate de zinc) dans des conditions de stress thermique aigu (37\u00b0C ; 40% d'humidit\u00e9) ; <em>ad libitum <\/em>la consommation d'aliments.<\/li>\n<\/ul>\n\n\n\n<p>Comme pr\u00e9vu, l'exposition des porcs \u00e0 des conditions de stress thermique aigu a entra\u00een\u00e9 une augmentation de la temp\u00e9rature rectale et de la fr\u00e9quence respiratoire, ainsi qu'une r\u00e9duction de l'ingestion d'aliments. Cependant, la recherche met \u00e9galement en lumi\u00e8re ce qui se passe \u00e0 l'int\u00e9rieur des porcs lors d'un stress thermique aigu.<\/p>\n\n\n\n<p>Les chercheurs ont mesur\u00e9 la perm\u00e9abilit\u00e9 il\u00e9ale - la troisi\u00e8me et derni\u00e8re partie de l'intestin gr\u00eale - des porcs r\u00e9colt\u00e9s. Les porcs soumis \u00e0 un stress thermique (traitement 3) et \u00e0 une alimentation neutre sur le plan thermique (traitement 2) pr\u00e9sentaient une plus grande perm\u00e9abilit\u00e9 de l'intestin que les porcs soumis \u00e0 une alimentation neutre sur le plan thermique (traitement 1). Cette constatation indique qu'un stress thermique, ou m\u00eame une p\u00e9riode pendant laquelle les animaux sont soumis \u00e0 une restriction de l'apport alimentaire, par exemple en cas d'absence d'alimentation (traitement 2), augmente le risque de perm\u00e9abilit\u00e9 intestinale (fuite de l'intestin).<\/p>\n\n\n\n<p>Lorsque les porcs ont \u00e9t\u00e9 soumis \u00e0 des conditions de stress thermique aigu, l'alimentation avec Availa Zn a permis de r\u00e9duire les fuites intestinales par rapport \u00e0 l'alimentation avec du sulfate de zinc inorganique. Les porcs nourris avec Availa Zn ont \u00e9t\u00e9 en mesure de mettre en place une r\u00e9ponse immunitaire plus efficace. Parmi les porcs soumis \u00e0 un stress thermique, ceux qui recevaient Availa Zn pr\u00e9sentaient des concentrations plus \u00e9lev\u00e9es de prot\u00e9ine de liaison au lipopolysaccharide (LPS) dans le plasma que ceux qui recevaient du sulfate de zinc. En tant que prot\u00e9ine de la phase aigu\u00eb, la prot\u00e9ine de liaison au LPS s\u00e9questre le LPS bact\u00e9rien afin qu'il puisse \u00eatre d\u00e9truit par d'autres composants immunitaires. Dans les traitements de stress thermique, les porcs nourris avec Availa Zn (traitement 4) pr\u00e9sentaient des niveaux d'endotoxines s\u00e9riques num\u00e9riquement inf\u00e9rieurs \u00e0 ceux des porcs nourris avec du sulfate de zinc (traitement 3).<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"http:\/\/www.zinpro.com\/wp-content\/uploads\/2023\/06\/Heat-Stress-1-1024x665.png\" alt=\"\" class=\"wp-image-14895\"\/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-heat-stress-and-performance-trace-minerals-bringing-it-all-together\">Stress thermique et oligo-\u00e9l\u00e9ments de performance : La r\u00e9union de tous les \u00e9l\u00e9ments<\/h3>\n\n\n\n<p>Le stress thermique est un probl\u00e8me tr\u00e8s r\u00e9pandu que les \u00e9leveurs de porcs doivent g\u00e9rer. Il est essentiel de mettre en place un plan avant l'arriv\u00e9e des fortes chaleurs afin de pr\u00e9venir les effets \u00e0 long terme du stress thermique sur les performances des animaux. En incorporant des oligo-\u00e9l\u00e9ments de performance comme Availa Zn dans l'alimentation des porcs, les animaux sont mieux \u00e0 m\u00eame de r\u00e9duire l'impact des fuites intestinales dans des conditions de stress thermique.<\/p>\n\n\n\n<p>La recherche d\u00e9montre que la source de zinc utilis\u00e9e dans l'alimentation des porcs est essentielle pour att\u00e9nuer le stress d\u00fb \u00e0 la chaleur. <a href=\"https:\/\/www.zinpro.com\/fr\/products\/availa-mins\/availa-zn\/\" target=\"_blank\" rel=\"noreferrer noopener\">Contactez votre repr\u00e9sentant Zinpro<\/a> pour en savoir plus sur les avantages de l'alimentation <a href=\"https:\/\/www.zinpro.com\/fr\/products\/availa-mins\/availa-zn\/\" target=\"_blank\" rel=\"noreferrer noopener\">Zn Availa<\/a> dans l'alimentation des porcs pour aider \u00e0 g\u00e9rer le stress thermique et l'inflammation.<\/p>","protected":false},"excerpt":{"rendered":"<p>Les syst\u00e8mes de refroidissement sont importants pour aider \u00e0 combattre l'impact du stress thermique sur votre troupeau de porcs. Apprenez comment les strat\u00e9gies nutritionnelles, y compris les oligo-\u00e9l\u00e9ments de performance tels qu'Availa<sup>\u00ae<\/sup>Zn, peut \u00e9galement contribuer \u00e0 att\u00e9nuer les effets du stress thermique et d'une affection appel\u00e9e \" fuite intestinale \".<\/p>","protected":false},"author":48,"featured_media":56511,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_tec_requires_first_save":true,"_eb_attr":"","_uag_custom_page_level_css":"","_EventAllDay":false,"_EventTimezone":"","_EventStartDate":"","_EventEndDate":"","_EventStartDateUTC":"","_EventEndDateUTC":"","_EventShowMap":false,"_EventShowMapLink":false,"_EventURL":"","_EventCost":"","_EventCostDescription":"","_EventCurrencySymbol":"","_EventCurrencyCode":"","_EventCurrencyPosition":"","_EventDateTimeSeparator":"","_EventTimeRangeSeparator":"","_EventOrganizerID":[],"_EventVenueID":[],"_OrganizerEmail":"","_OrganizerPhone":"","_OrganizerWebsite":"","_VenueAddress":"","_VenueCity":"","_VenueCountry":"","_VenueProvince":"","_VenueState":"","_VenueZip":"","_VenuePhone":"","_VenueURL":"","_VenueStateProvince":"","_VenueLat":"","_VenueLng":"","_VenueShowMap":false,"_VenueShowMapLink":false,"_tribe_blocks_recurrence_rules":"","_tribe_blocks_recurrence_description":"","_tribe_blocks_recurrence_exclusions":"","_ecp_custom_2":"","footnotes":""},"categories":[2682],"tags":[2693,2683,2684,2689,2685,2686],"species":[943],"class_list":["post-56508","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","tag-animal-husbandry","tag-animal-performance","tag-health","tag-heat-stress","tag-immunity","tag-inflammation"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.4 (Yoast SEO v27.4) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Heat Stress, Performance Trace Minerals &amp; Swine Gut Health &#8211; Zinpro\u00ae<\/title>\n<meta name=\"description\" content=\"Blog posts from Zinpro\u00ae about Heat Stress, Performance Trace Minerals &amp; Swine Gut Health . 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