{"id":85175,"date":"2026-02-04T14:59:09","date_gmt":"2026-02-04T18:59:09","guid":{"rendered":"https:\/\/www.mundoacuicola.cl\/new\/?p=85175"},"modified":"2026-02-05T17:38:33","modified_gmt":"2026-02-05T21:38:33","slug":"amebas-de-vida-libre-y-su-rol-en-la-transmision-de-piscirickettsia-salmonis","status":"publish","type":"post","link":"https:\/\/www.mundoacuicola.cl\/new\/amebas-de-vida-libre-y-su-rol-en-la-transmision-de-piscirickettsia-salmonis\/","title":{"rendered":"Amebas de vida libre y su rol en la transmisi\u00f3n de Piscirickettsia salmonis"},"content":{"rendered":"<p data-start=\"561\" data-end=\"933\">Un estudio cient\u00edfico publicado en la revista Frontiers in Microbiology identific\u00f3 que ciertas amebas de vida libre presentes en ambientes acu\u00e1ticos asociados a centros de cultivo podr\u00edan desempe\u00f1ar un rol relevante en la persistencia y transmisi\u00f3n de <em data-start=\"763\" data-end=\"789\">Piscirickettsia salmonis<\/em>, bacteria causante de la Septicemia Rickettsial Salmon\u00eddea (SRS), una de las principales enfermedades que afectan a la salmonicultura en Chile.<\/p>\n<p data-start=\"935\" data-end=\"1275\">La investigaci\u00f3n fue desarrollada por cient\u00edficos del Laboratorio de Gen\u00e9tica e Inmunolog\u00eda Molecular de la <strong>Pontificia Universidad Cat\u00f3lica de Valpara\u00edso<\/strong> (PUCV) y analiz\u00f3, mediante ensayos in vitro e in vivo, la interacci\u00f3n entre <em data-start=\"1165\" data-end=\"1178\">P. salmonis<\/em> y distintas especies de amebas de vida libre com\u00fanmente presentes en sistemas acu\u00e1ticos marinos.<\/p>\n<h3 data-start=\"935\" data-end=\"1275\"><strong>Hallazgos<\/strong><\/h3>\n<p data-start=\"1277\" data-end=\"1830\">El estudio demostr\u00f3 que <em data-start=\"1301\" data-end=\"1314\">P. salmonis<\/em> es capaz de ser internalizada, mantenerse viable, replicarse y posteriormente liberarse desde amebas como <em data-start=\"1421\" data-end=\"1447\">Acanthamoeba castellanii<\/em> y <em data-start=\"1450\" data-end=\"1460\">Vannella<\/em> sp., organismos microsc\u00f3picos ampliamente distribuidos en ambientes naturales y tambi\u00e9n asociados a sistemas productivos acu\u00edcolas. En el caso de <em data-start=\"1607\" data-end=\"1623\">A. castellanii<\/em>, los resultados indican que la bacteria puede persistir de forma estable en su interior por varios d\u00edas, expresando genes asociados a su sistema de secreci\u00f3n Dot\/Icm, clave para su replicaci\u00f3n intracelular.<\/p>\n<p data-start=\"1832\" data-end=\"2338\">En experimentos in vitro, los investigadores observaron que amebas previamente infectadas con <em data-start=\"1926\" data-end=\"1939\">P. salmonis<\/em> fueron capaces de transmitir la bacteria a c\u00e9lulas de salm\u00f3n Atl\u00e1ntico, generando los efectos citop\u00e1ticos caracter\u00edsticos de la infecci\u00f3n. A nivel in vivo, peces expuestos a amebas marinas infectadas presentaron detecci\u00f3n de <em data-start=\"2165\" data-end=\"2178\">P. salmonis<\/em> en tejidos internos, confirmando la viabilidad de la bacteria tras su paso por estos protozoos, aunque sin provocar mortalidad durante el per\u00edodo experimental.<\/p>\n<p data-start=\"2340\" data-end=\"2821\">Los autores plantean que estas amebas podr\u00edan actuar como reservorios ambientales y potenciales vectores del pat\u00f3geno, contribuyendo a su persistencia en el ambiente marino y a la reinfecci\u00f3n de peces en centros de cultivo. Este hallazgo resulta especialmente relevante considerando que los brotes de SRS suelen presentarse incluso en peces provenientes de hatcheries certificados como libres del pat\u00f3geno, lo que sugiere la existencia de fuentes ambientales a\u00fan poco comprendidas.<\/p>\n<p data-start=\"2823\" data-end=\"3149\">El trabajo concluye que comprender el rol de las amebas de vida libre en el ciclo de <em data-start=\"2908\" data-end=\"2934\">Piscirickettsia salmonis<\/em> aporta nuevos elementos para interpretar la epidemiolog\u00eda de la SRS y abre l\u00edneas de investigaci\u00f3n orientadas al dise\u00f1o de estrategias de monitoreo, prevenci\u00f3n y control m\u00e1s integrales en la salmonicultura chilena.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Un estudio desarrollado por investigadores de la Pontificia Universidad Cat\u00f3lica de Valpara\u00edso (PUCV) analiz\u00f3 el rol de las amebas de vida libre en la transmisi\u00f3n de Piscirickettsia salmonis en la salmonicultura chilena, aportando evidencia experimental in vitro e in vivo sobre su potencial participaci\u00f3n en la din\u00e1mica de la piscirickettsiosis.<\/p>\n","protected":false},"author":10,"featured_media":85178,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[60],"tags":[1261,143,28808,9065,122,2907,458,3748,184,2273,6027,137,197],"class_list":["post-85175","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-salmonicultura","tag-acuicola","tag-acuicultura","tag-amebas-de-vida-libre","tag-frontiers-in-microbiology","tag-industria-acuicola","tag-industria-salmonera","tag-piscirickettsia-salmonis","tag-revista-frontiers","tag-salmon","tag-salmon-chileno","tag-salmonera","tag-salmones","tag-salmonicultura"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.2 - 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