Nueva cepa de coronavirus en Dinamarca que podría complicar la vacunación

Dinamarca está en alerta máxima. El país escandinavo mantiene en vilo a la comunidad científica en las últimas horas después de detectarse una mutación del Sars-CoV2 en visones de la que ya se han contagiado 214 personas, según los datos más recientes. En las últimas 24 horas, las personas infectadas con esta nueva cepa han pasado de 12 a más de 200 y ya se ha detectado algún caso en Croacia. Virólogos daneses dicen que la situación es preocupante. Intentan controlar el contagio por miedo a convertirse “en el Wuhan europeo”.

El centro danés de referencia para enfermedades infecciosas, el Instituto Statens Serum (SSI), y la Organización Mundial de la Salud (OMS) aseguran que es demasiado pronto para comprender lo que supone esta mutación del Sars-CoV2, aunque hay una amenaza evidente: que reste eficacia a la vacuna. La nueva cepa podría suponer un gran revés para las vacunas que se están desarrollando en todo el mundo, ya que podría modificar la forma en la que se transmite el virus y también su agresividad.

De hecho, de los ensayos realizados hasta el momento ya se desprende que el nuevo coronavirus muestra “una menor sensibilidad” ante los anticuerpos de pacientes humanos que habían superado la enfermedad. “Cabe la posibilidad de que el sistema inmune no la reconozca aunque hayas pasado el coronavirus normal (Sars-CoV2) y están muy asustados por si puede influir en la vacuna”, reconoce también Felices. Asegura que “es un riesgo potencial que existe” y por eso la alerta es máxima.

Cabe la posibilidad de que el sistema inmune no la reconozca aunque hayas pasado el coronavirus normal (Sars-CoV2) y están muy asustados por si puede influir en la vacuna

Aunque todavía se está estudiando qué ha pasado para que se produjese esta mutación, los virólogos escandinavos apuntan que el Covid-19 habría pasado de los trabajadores de la granja de visones directamente a los animales, en cuyo organismo se produjo la mutación. De vuelta, los visones contagiaron a las personas con las que estuvieron en contacto, pero de una nueva cepa de la que todavía no se sabe mucho. Cabe la posibilidad de que el sistema inmune no la reconozca aunque se haya pasado el coronavirus actual (Sars-CoV2) y están muy asustados por si puede influir en la vacuna.

Protesta de agricultores en Holstebro, Dinamarca.Todos los visones en Dinamarca deben ser sacrificados al detectarse una mutación del coronavirus. 

La responsable del Departamento de Epidemiología y Prevención de Enfermedades Infecciosa del centro sanitario danés ha confirmado que entre los animales se han encontrado cinco mutaciones diferentes del coronavirus con las que se han contagiado ya 214 personas. La gran mayoría de ellos son trabajadores de la granja donde se produjo la mutación y personas cercanas a ellos. Además, en las últimas horas “se ha detectado también un brote la nueva cepa en una residencia de ancianos a unos cientos de kilómetros de una de las granjas”, explica Manuel Felices, en contacto continuo con los expertos daneses.

De las cinco mutaciones, la que más interesa a los expertos es la llamada ‘Cluster5’. Esta cepa presenta modificaciones que afectan a la espícula viral del coronavirus, uno de los múltiples ‘brazos’ con los que el patógeno se engancha a las células de su huésped para replicarse. Si tenemos en cuenta que la mayoría de vacunas en las que se está trabajando actualmente contrarreloj para atajar la pandemia se centran en esos ‘brazos’ buscando impedir que el virus se replique, cualquier variación en ellos puede cambiar la estrategia de la comunidad científica de todo el mundo.

El Gobierno ha tomado la decisión de sacrificar a los 17 millones de visones criados en cautiverio en las más de 1.000 granjas del país. Buscan evitar convertirse en el Wuhan europeo.

En Dinamarca el objetivo ahora es que la mutación no salga de sus fronteras y “no convertirse en el Wuhan europeo”, asegura Manuel Felices.

Por el momento, el Gobierno ha tomado la decisión de sacrificar a los 17 millones de visones criados en cautiverio en las más de 1.000 granjas del país. El sacrificio de los animales ha empezado por las más de 200 granjas donde se encontraron los visones con coronavirus, más el centenar de centros que están a menos de 9 kilómetros de los centros de cría afectadas.

El plan es que se extienda la medida a todo el país, en un proceso que va a durar apenas unas semanas. Planean también realizar test de coronavirus a los alrededor de 280.000 habitantes de esas localidades y, entre los positivos, se analizará el tipo de variante presente. Además el Gobierno ya ha decretado el cierre perimetral de las siete localidades más afectadas. 

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