{"id":7240,"date":"2026-11-07T00:41:20","date_gmt":"2026-11-07T05:41:20","guid":{"rendered":"https:\/\/canasanta.ca\/?p=7240"},"modified":"2026-11-07T00:41:20","modified_gmt":"2026-11-07T05:41:20","slug":"nitratos-mosquitos-resistencia-insecticidas-nigeria","status":"publish","type":"post","link":"https:\/\/canasanta.ca\/en\/ciencia\/nitratos-mosquitos-resistencia-insecticidas-nigeria\/","title":{"rendered":"LOS FERTILIZANTES PODR\u00cdAN FORTALECER A LOS MOSQUITOS"},"content":{"rendered":"

Un fertilizante que llega a un charco puede cambiar mucho m\u00e1s que la qu\u00edmica del agua. Una investigaci\u00f3n realizada en Nigeria encontr\u00f3 que los mosquitos Aedes aegypti<\/em> criados en ambientes enriquecidos con nitratos desarrollaron caracter\u00edsticas fisiol\u00f3gicas asociadas con una menor susceptibilidad a un insecticida habitual. El hallazgo plantea una conexi\u00f3n inquietante entre la contaminaci\u00f3n agr\u00edcola y la eficacia del control de vectores, aunque todav\u00eda debe comprobarse fuera del laboratorio.<\/p>\n

EL AGUA DONDE COMIENZA TODO<\/h2>\n

El estudio fue publicado el 6 de noviembre de 2026<\/strong> en la revista cient\u00edfica Scientific Reports<\/em>. Sus autores, encabezados por Ezekiel Bala<\/strong> y Azubuike Christian Ukubuiwe<\/strong>, examinaron c\u00f3mo distintas concentraciones de nitrato en el agua de cr\u00eda influyen en el desarrollo, las reservas energ\u00e9ticas y la respuesta posterior de los insectos a la permetrina.<\/p>\n

Los nitratos pueden alcanzar peque\u00f1as acumulaciones de agua mediante la escorrent\u00eda de suelos fertilizados. Esos recipientes, zanjas y charcos son precisamente algunos de los lugares donde se desarrollan las fases acu\u00e1ticas de diversas especies de mosquitos. El trabajo se centr\u00f3 en Aedes aegypti<\/em>, vector de enfermedades como el dengue, el zika y el chikungu\u00f1a.<\/p>\n

En condiciones experimentales, las larvas fueron criadas con concentraciones de nitrato comprendidas entre cero y 1.024 miligramos por litro. Los investigadores siguieron su desarrollo hasta la emergencia de los adultos y midieron variables de supervivencia, crecimiento y metabolismo. Despu\u00e9s evaluaron la susceptibilidad a permetrina al 0,75 %, adem\u00e1s de la actividad de enzimas relacionadas con la desintoxicaci\u00f3n.<\/p>\n

MOSQUITOS M\u00c1S RESISTENTES<\/h2>\n

El resultado no fue simplemente que m\u00e1s nitrato produjera mosquitos m\u00e1s r\u00e1pidos. A concentraciones elevadas, las etapas larvaria y pupal tardaron m\u00e1s en completarse. Sin embargo, la supervivencia se mantuvo por encima del 90 % en las condiciones ensayadas, y la tasa de crecimiento larvario alcanz\u00f3 su m\u00e1ximo con un enriquecimiento moderado de 16 miligramos por litro.<\/p>\n

Las reservas metab\u00f3licas medidas \u2014l\u00edpidos, prote\u00ednas, gluc\u00f3geno y glucosa\u2014 aumentaron con la exposici\u00f3n al nitrato. Al mismo tiempo, los mosquitos criados en esos medios mostraron una susceptibilidad reducida a la permetrina y mayor actividad de esterasas y glutati\u00f3n S-transferasas, familias de enzimas que pueden participar en procesos de detoxificaci\u00f3n.<\/p>\n

\"Mosquito
Fotograf\u00eda de contexto. Imagen: \u0415\u0433\u043e\u0440 \u041a\u0430\u043c\u0435\u043b\u0435\u0432 \/ Unsplash.<\/figcaption><\/figure>\n

Estas observaciones sugieren que el ambiente acu\u00e1tico temprano puede modificar la condici\u00f3n fisiol\u00f3gica de un mosquito y su respuesta a una intervenci\u00f3n qu\u00edmica posterior. Pero conviene distinguir entre una tolerancia observada en laboratorio y una resistencia hereditaria establecida en poblaciones silvestres. El experimento no demuestra por s\u00ed solo que los fertilizantes est\u00e9n causando brotes de dengue ni que todos los insecticidas pierdan eficacia.<\/p>\n

UNA VARIABLE OLVIDADA EN LA PREVENCI\u00d3N<\/h2>\n

El control de mosquitos suele concentrarse en eliminar criaderos, reducir el contacto con las personas y aplicar productos adecuados cuando las autoridades sanitarias lo consideran necesario. La investigaci\u00f3n a\u00f1ade una variable ambiental: la calidad del agua donde crecen las larvas podr\u00eda condicionar el desempe\u00f1o de algunas medidas.<\/p>\n

La relaci\u00f3n importa especialmente en regiones donde coinciden la agricultura intensiva, el drenaje deficiente y las enfermedades transmitidas por mosquitos. La escorrent\u00eda rica en nutrientes no se distribuye uniformemente y puede variar con las lluvias, el tipo de suelo y las pr\u00e1cticas agr\u00edcolas. Por eso, extrapolar los resultados requiere medir concentraciones reales de nitrato y comparar poblaciones de campo.<\/p>\n

Tambi\u00e9n ser\u00eda necesario comprobar si el efecto se reproduce con otros insecticidas, en otras temperaturas y en presencia de mezclas de contaminantes. La mayor actividad de enzimas detoxificantes ofrece una pista mecan\u00edstica, pero no sustituye los estudios que permitan establecer causalidad y consecuencias epidemiol\u00f3gicas.<\/p>\n

QU\u00c9 CAMBIA PARA LA SALUD P\u00daBLICA<\/h2>\n

Los autores proponen incorporar la gesti\u00f3n de nutrientes ambientales a la planificaci\u00f3n del control vectorial. No se trata de abandonar los insecticidas ni de atribuir a los fertilizantes una responsabilidad \u00fanica, sino de investigar c\u00f3mo interact\u00faan la contaminaci\u00f3n, la biolog\u00eda del mosquito y las estrategias de prevenci\u00f3n.<\/p>\n

El trabajo ofrece una advertencia cient\u00edficamente relevante: un problema de calidad del agua puede tener efectos biol\u00f3gicos que van m\u00e1s all\u00e1 de la eutrofizaci\u00f3n o el deterioro de los ecosistemas. En el caso de Aedes aegypti<\/em>, los cambios comienzan antes de que el insecto adulto emprenda su primer vuelo. Determinar cu\u00e1nto pesan esos cambios en condiciones naturales ser\u00e1 el siguiente desaf\u00edo.<\/p>","protected":false},"excerpt":{"rendered":"

Un estudio publicado el 6 de noviembre en Scientific Reports revela que el nitrato en el agua de cr\u00eda modifica la fisiolog\u00eda del mosquito Aedes aegypti y reduce su susceptibilidad a la permetrina.<\/p>","protected":false},"author":284226809,"featured_media":7238,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_wpcom_ai_launchpad_first_post":false,"_jetpack_hide_featured_image":false,"_jetpack_featured_image_duplicate_dismissed":0,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"jetpack_post_was_ever_published":false},"categories":[33205457,3213],"tags":[33205734,33205768,33206618],"class_list":["post-7240","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-al-dia","category-ciencia","tag-contaminacion","tag-control-de-mosquitos","tag-mosquitos"],"acf":[],"yoast_head":"\nLOS FERTILIZANTES PODR\u00cdAN FORTALECER A LOS MOSQUITOS - Ca\u00f1asanta<\/title>\n<meta name=\"description\" content=\"Investigaci\u00f3n en Nigeria revela que los nitratos en criaderos de Aedes aegypti reducen su susceptibilidad a la permetrina. 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