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Serga [27]
2 years ago
7

Un niño que ha enfermado de paperas o varicela, no desarrollará estas enfermedades en una segunda oportunidad, porque: I.- la pi

el, mucosas y lágrimas impiden el ingreso de los microbios. II.- en el primer contacto adquirió anticuerpos. III.- interviene la inmunidad Adaptativa, la cual presenta "memoria" IV.- su sistema defensivo está preparado frente a una segunda exposición
Medicine
1 answer:
alexgriva [62]2 years ago
5 0

Answer:

Las respuestas II, III y IV son correctas

Explanation:

La papera, también conocida como parotiditis, es una enfermedad vírica altamente contagiosa causada por un virus de la familia Paramyxoviridae, la cual se desarrolla principalmente en las glándulas parótidas situadas a ambos lados de la mandíbula. La inmunidad a esta enfermedad puede ser lograda a partir de la aplicación de la vacuna triple viral, cuyo nombre se debe a que esta vacuna también permite adquirir inmunidad contra los virus del sarampión y la rubéola. Por otra parte, la varicela es también una enfermedad muy contagiosa que se presenta generalmente en niños, la cual es causada por el herpesvirus de varicela-zoster. Esta enfermedad se caracteriza por la presencia de erupciones rojas en la piel que causan picazón, lo cual a su vez genera lesiones cutáneas. Tanto la varicela como la papera sólo se producen una vez ya que una vez contagiado el organismo adquiere inmunidad frente a estos virus a través de un mecanismo adaptativo en el cual linajes específicos de linfocitos B capaces de secretar anticuerpos específicos contra ambos virus proliferan rápidamente a través de un proceso conocido como expansión monoclonal, con lo cual el sistema inmune adquiere memoria inmunológica.

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