{"id":59913,"date":"2020-06-30T08:57:55","date_gmt":"2020-06-30T13:57:55","guid":{"rendered":"http:\/\/quehacerpolitico.mx\/?p=59913"},"modified":"2020-06-30T08:57:55","modified_gmt":"2020-06-30T13:57:55","slug":"internacionales-carolina-alonso-romei-descubren-en-china-un-virus-propicio-para-una-nueva-pandemia","status":"publish","type":"post","link":"https:\/\/quehacerpolitico.mx\/?p=59913","title":{"rendered":"Internacionales\/\/\/Carolina Alonso Romei\/\/\/Descubren en China un virus propicio para una nueva pandemia"},"content":{"rendered":"

Descubren en China un virus propicio para una nueva pandemia
\nPor Carolina Alonso Romei<\/h1>\n

Internacionalista<\/p>\n

De acuerdo con investigadores, el virus G4 desciende gen\u00e9ticamente de la cepa H1N1 identificada\u00a0en cerdos<\/p>\n

Investigadores descubrieron en China\u00a0una nueva cepa del virus de la gripe porcina con todas las caracter\u00edsticas capaces de causar una futura pandemia, seg\u00fan un estudio publicado el lunes en la revista cient\u00edfica estadounidense PNAS<\/p>\n

“La preocupaci\u00f3n es que las infecciones de humanos por los virus G4 no conducen a la adaptaci\u00f3n humana\u201d<\/p><\/blockquote>\n

El virus se llama G4<\/strong> y desciende gen\u00e9ticamente de la cepa H1N1 que caus\u00f3 una pandemia en 2009: “Tiene todos los rasgos esenciales que muestran una alta adaptabilidad para infectar a los humanos”<\/strong>, escriben los autores, cient\u00edficos de universidades chinas y del Centro de Prevenci\u00f3n y Control de Enfermedades de China.<\/p>\n

El trabajo presentado es voluminoso: de 2011 a 2018, se tomaron 30 mil muestras con hisopos nasales de cerdos en mataderos en 10 provincias chinas y en un hospital veterinario, lo que permiti\u00f3 aislar 179 virus de gripe porcina.<\/p>\n

La mayor\u00eda eran de la nueva variedad, que se ha vuelto dominante en los cerdos desde 2016.\u00a0<\/strong><\/p>\n

A partir de all\u00ed, los investigadores llevaron a cabo diversos experimentos en laboratorio con hurones, animales ampliamente utilizados en la investigaci\u00f3n de la gripe porque sus s\u00edntomas son comparables a los de los humanos<\/strong>: tienen fiebre, tosen y estornudan.<\/p>\n

\n
\n

Observaron que los virus G4 eran m\u00e1s infecciosos, se replicaban en las c\u00e9lulas humanas y causaban en los hurones s\u00edntomas m\u00e1s graves que otras cepas.<\/p>\n

Adem\u00e1s, se constat\u00f3 con pruebas in vitro que la inmunidad obtenida tras el contacto con los virus humanos de la gripe estacional no protege contra G4.<\/p>\n

La otra mala noticia es que un n\u00famero relativamente alto de trabajadores que tienen contacto habitual con cerdos hab\u00edan sido infectados<\/strong>, 10.4%, seg\u00fan los an\u00e1lisis de sangre que detectaron la presencia de anticuerpos contra el virus.<\/p>\n

El 4.4% de la poblaci\u00f3n general tambi\u00e9n parec\u00eda estar infectada.<\/p>\n

Por lo tanto, el virus ya se ha propagado a los humanos, dicen los cient\u00edficos, pero no hay evidencia de que pueda transmitirse de humano a humano. Ese es precisamente su temor actual.<\/p>\n

“Las pandemias ocurren cuando los virus de gripe A con un nuevo ant\u00edgeno de superficie HA se vuelven capaces de transmitirse de humano a humano”, concluyen los investigadores.<\/p>\n

“La preocupaci\u00f3n es que las infecciones de humanos por los virus G4 no conducen a la adaptaci\u00f3n humana y aumentan el riesgo de una pandemia humana<\/strong>“.<\/p>\n

Es urgente, dicen, implementar una vigilancia de las poblaciones que trabajan en contacto con los cerdos.<\/p>\n

“El estudio es un recordatorio saludable de que constantemente corremos el riesgo de la aparici\u00f3n de pat\u00f3genos zoon\u00f3ticos, y que los animales de granja, con los que los humanos est\u00e1n m\u00e1s en contacto que con los animales salvajes, son la fuente de virus pand\u00e9micosimportantes<\/strong>“, dijo James Wood, jefe del departamento de medicina veterinaria de la Universidad de Cambridge.<\/p>\n

Consultado acerca de este virus, un portavoz del Ministerio de Relaciones Exteriores de China dijo el martes durante una conferencia de prensa habitual que China “le est\u00e1 prestando una atenci\u00f3n particular a su desarrollo” y tomar\u00e1 las medidas necesarias para contener su propagaci\u00f3n.<\/p>\n

Con informaci\u00f3n de AFP<\/p>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

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