{"id":748402,"date":"2023-07-18T14:27:26","date_gmt":"2023-07-18T17:27:26","guid":{"rendered":"https:\/\/bahiaeconomica.com.br\/wp\/?p=748402"},"modified":"2023-07-18T14:27:43","modified_gmt":"2023-07-18T17:27:43","slug":"salto-de-gripe-aviaria-para-humanos-e-raro-na-historia-evolutiva-do-virus","status":"publish","type":"post","link":"https:\/\/bahiaeconomica.com.br\/wp\/2023\/07\/18\/salto-de-gripe-aviaria-para-humanos-e-raro-na-historia-evolutiva-do-virus\/","title":{"rendered":"SALTO DE GRIPE AVI\u00c1RIA EM HUMANOS \u00c9 RARO NA HIST\u00d3RIA EVOLUTIVA DO V\u00cdRUS"},"content":{"rendered":"
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O salto evolutivo necess\u00e1rio para uma cepa do v\u00edrus da gripe avi\u00e1ria infectar humanos ocorreu poucas vezes, de acordo com um estudo da revista especializada no assunto, PNAS (Proceedings of the National Academy of Sciences). A pesquisa foi publicada nesta segunda-feira (17).<\/p>\n

O documento mostra que as altera\u00e7\u00f5es na prote\u00edna hemaglutinina (HA, a letra “H” dos tipos de influenza), que \u00e9 a principal respons\u00e1vel pela liga\u00e7\u00e3o do v\u00edrus com as c\u00e9lulas do hospedeiro, ocorreram apenas duas vezes na hist\u00f3ria evolutiva do influenza A H3N2, respons\u00e1vel pela pandemia de gripe avi\u00e1ria em 1968, iniciada em Hong Kong.<\/p>\n

Entre 1968 at\u00e9 2009, \u00e9poca em que houve uma nova pandemia de gripe avi\u00e1ria mundial, o v\u00edrus n\u00e3o evoluiu para infectar gravemente ou se adaptar aos humanos, pois passou a apresentar a forma gen\u00e9rica, apesar de no in\u00edcio, ter apresentado a receptores presentes nas c\u00e9lulas humanas.<\/p>\n

No entanto, esse n\u00e3o \u00e9 o \u00fanico fator capaz de indicar a efic\u00e1cia do v\u00edrus, e a taxa de transmiss\u00e3o tamb\u00e9m deve ser levada em considera\u00e7\u00e3o, al\u00e9m da presen\u00e7a em tecidos e outras muta\u00e7\u00f5es.
\nFOTO: Pixabay<\/p>\n<\/div>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

O salto evolutivo necess\u00e1rio para uma cepa do v\u00edrus da gripe avi\u00e1ria infectar humanos ocorreu poucas vezes, de acordo com um estudo da revista especializada no assunto, PNAS (Proceedings of the National Academy of Sciences). A pesquisa foi publicada nesta segunda-feira (17). O documento mostra que as altera\u00e7\u00f5es na prote\u00edna hemaglutinina (HA, a letra “H” […]<\/p>\n","protected":false},"author":16,"featured_media":748409,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[21],"tags":[12476,301,58],"acf":[],"yoast_head":"\nSALTO DE GRIPE AVI\u00c1RIA EM HUMANOS \u00c9 RARO NA HIST\u00d3RIA EVOLUTIVA DO V\u00cdRUS - Bahia Economica<\/title>\n<meta name=\"description\" content=\"O salto evolutivo necess\u00e1rio para uma cepa do v\u00edrus da gripe avi\u00e1ria infectar humanos ocorreu poucas vezes.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/bahiaeconomica.com.br\/wp\/2023\/07\/18\/salto-de-gripe-aviaria-para-humanos-e-raro-na-historia-evolutiva-do-virus\/\" \/>\n<meta property=\"og:locale\" content=\"pt_BR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"SALTO DE GRIPE AVI\u00c1RIA EM HUMANOS \u00c9 RARO NA HIST\u00d3RIA EVOLUTIVA DO V\u00cdRUS - 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