{"id":84965,"date":"2026-01-30T16:01:19","date_gmt":"2026-01-30T20:01:19","guid":{"rendered":"https:\/\/www.mundoacuicola.cl\/new\/?p=84965"},"modified":"2026-02-03T07:55:15","modified_gmt":"2026-02-03T11:55:15","slug":"pathovet-lidera-estudios-que-evidencian-co-infeccion-y-limites-de-la-vacunacion-contra-srs","status":"publish","type":"post","link":"https:\/\/www.mundoacuicola.cl\/new\/pathovet-lidera-estudios-que-evidencian-co-infeccion-y-limites-de-la-vacunacion-contra-srs\/","title":{"rendered":"Pathovet lidera estudios que evidencian co-infecci\u00f3n y l\u00edmites de la vacunaci\u00f3n contra SRS"},"content":{"rendered":"<p data-start=\"320\" data-end=\"790\">Dos investigaciones cient\u00edficas recientes aportan nueva evidencia sobre la complejidad epidemiol\u00f3gica de la piscirickettsiosis (SRS) en la salmonicultura chilena y los desaf\u00edos que enfrenta su control sanitario. En conjunto, los estudios muestran que la co-circulaci\u00f3n de los genogrupos LF-89 y EM-90 de <em data-start=\"624\" data-end=\"650\">Piscirickettsia salmonis<\/em>, junto con una estrategia vacunal centrada en un solo genogrupo, podr\u00eda estar influyendo en la din\u00e1mica actual de la enfermedad en terreno.<\/p>\n<p data-start=\"792\" data-end=\"1042\">Las investigaciones fueron desarrolladas por <strong data-start=\"837\" data-end=\"872\">investigadores de Pathovet Labs<\/strong>, y analizan desde distintos \u00e1ngulos la evoluci\u00f3n de la SRS en centros de cultivo, combinando evidencia epidemiol\u00f3gica de campo y resultados experimentales de vacunaci\u00f3n.<\/p>\n<p data-start=\"1044\" data-end=\"1688\">El primer estudio, publicado en <em data-start=\"1076\" data-end=\"1087\">Pathogens<\/em> en 2023, demostr\u00f3 por primera vez la <strong data-start=\"1125\" data-end=\"1152\">co-infecci\u00f3n simult\u00e1nea<\/strong> de los genogrupos LF-89 y EM-90 en centros de cultivo, peces individuales e incluso en distintos tejidos de un mismo pez. El trabajo tambi\u00e9n identific\u00f3 un <strong data-start=\"1308\" data-end=\"1346\">cambio sostenido en la prevalencia<\/strong> de los genogrupos, con un aumento progresivo de LF-89, que pas\u00f3 de representar cerca del 55 % de los aislamientos en 2017 a transformarse en el genogrupo dominante en a\u00f1os recientes. Estos hallazgos ponen en cuesti\u00f3n los enfoques de vigilancia que no distinguen entre genogrupos y refuerzan la necesidad de monitoreo epidemiol\u00f3gico m\u00e1s fino.<\/p>\n<p data-start=\"1690\" data-end=\"2221\">El segundo estudio, publicado en <em data-start=\"1723\" data-end=\"1752\">Fish &amp; Shellfish Immunology<\/em> en 2024, evalu\u00f3 la <strong data-start=\"1772\" data-end=\"1850\">protecci\u00f3n cruzada de la estrategia de vacunaci\u00f3n actualmente utilizada en Chile<\/strong>, basada exclusivamente en el genogrupo EM-90. Los resultados mostraron que, frente a desaf\u00edos con LF-89, la protecci\u00f3n fue <strong data-start=\"1974\" data-end=\"1988\">incompleta<\/strong>, con menores tasas de supervivencia y una progresi\u00f3n m\u00e1s r\u00e1pida de la enfermedad en comparaci\u00f3n con infecciones por EM-90. El trabajo tambi\u00e9n evidenci\u00f3 diferencias en la probabilidad y velocidad de mortalidad entre ambos genogrupos.<\/p>\n<h3 data-start=\"1690\" data-end=\"2221\"><strong>Hallazgos<\/strong><\/h3>\n<p data-start=\"2223\" data-end=\"2759\">Ambas investigaciones convergen en que la <strong data-start=\"2258\" data-end=\"2283\">vacunaci\u00f3n heter\u00f3loga<\/strong>, aplicada frente a un pat\u00f3geno con al menos dos genogrupos circulantes, podr\u00eda estar ejerciendo una <strong data-start=\"2384\" data-end=\"2405\">presi\u00f3n selectiva<\/strong> que favorece la expansi\u00f3n de LF-89 en campo. En ese contexto, los autores plantean la necesidad de avanzar hacia estrategias m\u00e1s ajustadas a la realidad epidemiol\u00f3gica, incluyendo vigilancia molecular espec\u00edfica por genogrupo, el desarrollo de <strong data-start=\"2650\" data-end=\"2695\">vacunas bivalentes o esquemas de refuerzo<\/strong>, y el uso complementario de herramientas de inmunoestimulaci\u00f3n.<\/p>\n<p data-start=\"2761\" data-end=\"3107\">En conjunto, la evidencia sugiere que el control efectivo de la piscirickettsiosis requiere integrar diagn\u00f3stico diferencial, actualizaci\u00f3n de las estrategias de vacunaci\u00f3n y una comprensi\u00f3n m\u00e1s profunda de la respuesta inmune del hospedero, especialmente en un escenario de alta complejidad bacteriana y din\u00e1mica cambiante en los centros de cultivo.<\/p>\n<h4 data-start=\"3109\" data-end=\"3148\"><strong data-start=\"3109\" data-end=\"3148\" data-is-last-node=\"\">Revise los estudios completos aqu\u00ed:<\/strong><\/h4>\n<p><a href=\"https:\/\/pubmed.ncbi.nlm.nih.gov\/36986371\/\">Co-infecci\u00f3n por genogrupos tipo LF-89 y EM-90 de <em data-start=\"50\" data-end=\"76\">Piscirickettsia salmonis<\/em> en salm\u00f3n Atl\u00e1ntico de cultivo en Chile: implicancias para la vigilancia y el control de la piscirickettsiosis.<\/a><\/p>\n<div class=\"flex flex-col text-sm pb-25\">\n<article class=\"text-token-text-primary w-full focus:outline-none [--shadow-height:45px] has-data-writing-block:pointer-events-none has-data-writing-block:-mt-(--shadow-height) has-data-writing-block:pt-(--shadow-height) [&amp;:has([data-writing-block])&gt;*]:pointer-events-auto scroll-mt-[calc(var(--header-height)+min(200px,max(70px,20svh)))]\" dir=\"auto\" tabindex=\"-1\" data-turn-id=\"78103bb9-08ee-4349-854b-c4f8f351f91b\" data-testid=\"conversation-turn-182\" data-scroll-anchor=\"true\" data-turn=\"assistant\">\n<div class=\"text-base my-auto mx-auto pb-10 [--thread-content-margin:--spacing(4)] @w-sm\/main:[--thread-content-margin:--spacing(6)] @w-lg\/main:[--thread-content-margin:--spacing(16)] px-(--thread-content-margin)\">\n<div class=\"[--thread-content-max-width:40rem] @w-lg\/main:[--thread-content-max-width:48rem] mx-auto max-w-(--thread-content-max-width) flex-1 group\/turn-messages focus-visible:outline-hidden relative flex w-full min-w-0 flex-col agent-turn\" tabindex=\"-1\">\n<div class=\"flex max-w-full flex-col grow\">\n<div class=\"min-h-8 text-message relative flex w-full flex-col items-end gap-2 text-start break-words whitespace-normal [.text-message+&amp;]:mt-1\" dir=\"auto\" data-message-author-role=\"assistant\" data-message-id=\"12ff8f65-7eaa-454c-a9f6-5a4e391ceb7d\" data-message-model-slug=\"gpt-5-2\">\n<div class=\"flex w-full flex-col gap-1 empty:hidden first:pt-[1px]\">\n<div class=\"markdown prose dark:prose-invert w-full wrap-break-word light markdown-new-styling\">\n<p data-start=\"0\" data-end=\"188\" data-is-last-node=\"\" data-is-only-node=\"\"><a href=\"https:\/\/www.sciencedirect.com\/science\/article\/pii\/S1050464824005382\">La estrategia actual de vacunaci\u00f3n contra <em data-start=\"42\" data-end=\"68\">Piscirickettsia salmonis<\/em> en Chile, basada \u00fanicamente en el genogrupo EM-90, muestra una protecci\u00f3n cruzada incompleta frente al genogrupo LF-89.<\/a><\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/article>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Investigaciones lideradas por Pathovet evidencian co-infecci\u00f3n por genogrupos de Piscirickettsia salmonis y desaf\u00edos en la estrategia de vacunaci\u00f3n actual.<\/p>\n","protected":false},"author":10,"featured_media":84969,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[60],"tags":[1261,143,122,2907,458,471,184,6027,137,197,3447,472],"class_list":["post-84965","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-salmonicultura","tag-acuicola","tag-acuicultura","tag-industria-acuicola","tag-industria-salmonera","tag-piscirickettsia-salmonis","tag-piscirickettsiosis","tag-salmon","tag-salmonera","tag-salmones","tag-salmonicultura","tag-salmonicultura-chilena","tag-srs"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.7 - 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