{"id":59280,"date":"2026-03-11T07:00:37","date_gmt":"2026-03-11T10:00:37","guid":{"rendered":"https:\/\/www2.ifsc.usp.br\/portal-ifsc\/?p=59280"},"modified":"2026-03-11T07:55:29","modified_gmt":"2026-03-11T10:55:29","slug":"alerta-em-fazendas-leiteiras-no-nordeste-do-brasil-com-bacteria-streptococcus-agalactiae-provovando-altos-indices-de-mastite-bovina","status":"publish","type":"post","link":"https:\/\/www2.ifsc.usp.br\/portal-ifsc\/alerta-em-fazendas-leiteiras-no-nordeste-do-brasil-com-bacteria-streptococcus-agalactiae-provovando-altos-indices-de-mastite-bovina\/","title":{"rendered":"Alerta em fazendas leiteiras no Nordeste do Brasil com bact\u00e9ria Streptococcus agalactiae provovando altos \u00edndices de mastite bovina"},"content":{"rendered":"<div id=\"attachment_59281\" style=\"width: 510px\" class=\"wp-caption alignleft\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-59281\" class=\"wp-image-59281 size-full\" src=\"https:\/\/www2.ifsc.usp.br\/portal-ifsc\/wp-content\/uploads\/2026\/03\/iomlan-animal-science.jpg\" alt=\"\" width=\"500\" height=\"333\" srcset=\"https:\/\/www2.ifsc.usp.br\/portal-ifsc\/wp-content\/uploads\/2026\/03\/iomlan-animal-science.jpg 500w, https:\/\/www2.ifsc.usp.br\/portal-ifsc\/wp-content\/uploads\/2026\/03\/iomlan-animal-science-300x200.jpg 300w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><p id=\"caption-attachment-59281\" class=\"wp-caption-text\"><em><strong>Mastite bovina (Cr\u00e9ditos &#8211; &#8220;Iomlan Animal Science&#8221;)<\/strong><\/em><\/p><\/div>\n<p>Um amplo mapeamento gen\u00e9tico de <em>Streptococcus agalactiae<\/em> \u2014 bact\u00e9ria associada \u00e0 mastite bovina \u2014 revelou alta diversidade de linhagens circulando em rebanhos leiteiros do Nordeste brasileiro, al\u00e9m da presen\u00e7a de genes ligados \u00e0 resist\u00eancia a antibi\u00f3ticos importantes na pr\u00e1tica veterin\u00e1ria. Os dados refor\u00e7am o alerta para vigil\u00e2ncia sanit\u00e1ria e uso mais criterioso de antimicrobianos na pecu\u00e1ria leiteira.<\/p>\n<p>O estudo, liderado pela pesquisadora do IFSC\/USP, Prof\u00aa Ilana Lopes Baratella da Cunha Camargo, juntamente com sua equipe e outros colegas brasileiros e publicado na revista cient\u00edfica internacional \u201cPathogens\u201d, analisou amostras de leite de vacas com mastite cl\u00ednica e subcl\u00ednica no estado da Para\u00edba.<\/p>\n<p>A partir do sequenciamento gen\u00f4mico completo das bact\u00e9rias isoladas, os pesquisadores identificaram diferentes tipos de sequ\u00eancia (STs), com destaque para linhagens j\u00e1 associadas a infec\u00e7\u00f5es em bovinos em outras partes do mundo. Essa variedade gen\u00e9tica indica que a popula\u00e7\u00e3o bacteriana \u00e9 mais complexa do que se imaginava e pode dificultar estrat\u00e9gias padronizadas de controle da doen\u00e7a.<\/p>\n<p>Entre os achados que mais preocupam est\u00e1 a detec\u00e7\u00e3o de genes de resist\u00eancia a antibi\u00f3ticos, incluindo aqueles relacionados \u00e0 tetraciclina e aos macrol\u00eddeos. Essas classes de medicamentos s\u00e3o frequentemente utilizadas no tratamento de infec\u00e7\u00f5es em animais de produ\u00e7\u00e3o. A presen\u00e7a desses genes sugere que parte das bact\u00e9rias j\u00e1 possui mecanismos para sobreviver a terapias convencionais, o que pode levar a falhas de tratamento e \u00e0 persist\u00eancia da infec\u00e7\u00e3o nos rebanhos.<\/p>\n<div id=\"attachment_59282\" style=\"width: 510px\" class=\"wp-caption alignright\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-59282\" class=\"wp-image-59282 size-full\" src=\"https:\/\/www2.ifsc.usp.br\/portal-ifsc\/wp-content\/uploads\/2026\/03\/streptococcus-agalactiae-wikipedia.jpg\" alt=\"\" width=\"500\" height=\"375\" srcset=\"https:\/\/www2.ifsc.usp.br\/portal-ifsc\/wp-content\/uploads\/2026\/03\/streptococcus-agalactiae-wikipedia.jpg 500w, https:\/\/www2.ifsc.usp.br\/portal-ifsc\/wp-content\/uploads\/2026\/03\/streptococcus-agalactiae-wikipedia-300x225.jpg 300w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><p id=\"caption-attachment-59282\" class=\"wp-caption-text\"><em><strong>Streptococcus_agalactiae (Cr\u00e9ditos &#8211; &#8220;Wikipedia&#8221;)<\/strong><\/em><\/p><\/div>\n<p>Os cientistas tamb\u00e9m investigaram fatores de virul\u00eancia \u2014 caracter\u00edsticas gen\u00e9ticas que aumentam a capacidade da bact\u00e9ria de causar doen\u00e7a. Foram encontrados genes associados \u00e0 ades\u00e3o \u00e0s c\u00e9lulas do hospedeiro e \u00e0 evas\u00e3o do sistema imune, elementos que ajudam a explicar por que <em>Streptococcus agalactiae<\/em> consegue estabelecer infec\u00e7\u00f5es cr\u00f4nicas na gl\u00e2ndula mam\u00e1ria das vacas, impactando diretamente a produ\u00e7\u00e3o e a qualidade do leite.<\/p>\n<p>A mastite est\u00e1 entre as enfermidades mais onerosas da cadeia leiteira, causando redu\u00e7\u00e3o da produ\u00e7\u00e3o, descarte de leite e custos com medicamentos e manejo. Para os autores da pesquisa, o detalhamento gen\u00f4mico das cepas circulantes abre caminho para programas de controle mais direcionados, que considerem o perfil gen\u00e9tico local das bact\u00e9rias, em vez de depender apenas de protocolos generalizados.<\/p>\n<p>Os resultados tamb\u00e9m dialogam com uma preocupa\u00e7\u00e3o global: a resist\u00eancia antimicrobiana. Embora o estudo tenha foco veterin\u00e1rio, microrganismos resistentes em animais podem representar risco indireto \u00e0 sa\u00fade p\u00fablica, seja por contato direto, seja pela cadeia alimentar. Por isso, os pesquisadores defendem integra\u00e7\u00e3o entre vigil\u00e2ncia animal e humana dentro do conceito de <em>Sa\u00fade \u00danica (One Health)<\/em><strong><em>.<\/em><\/strong><\/p>\n<p>Na pr\u00e1tica, o trabalho refor\u00e7a a import\u00e2ncia de medidas como diagn\u00f3stico laboratorial antes do tratamento, melhoria das condi\u00e7\u00f5es de higiene na ordenha e monitoramento constante dos rebanhos.<\/p>\n<p>Mais do que tratar, o desafio agora \u00e9 prevenir a dissemina\u00e7\u00e3o de linhagens resistentes que j\u00e1 est\u00e3o presentes nas fazendas leiteiras da regi\u00e3o.<\/p>\n<p>Confira <a href=\"https:\/\/www.mdpi.com\/2076-0817\/15\/2\/128\" target=\"_blank\" rel=\"noopener\"><strong>AQUI<\/strong> <\/a>o estudo publicado na revista internacional \u201cPathogens\u201d.<\/p>\n<p style=\"text-align: right;\">Rui Sintra \u2013 Assessoria de Comunica\u00e7\u00e3o &#8211; IFSC\/USP<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Um amplo mapeamento gen\u00e9tico de Streptococcus agalactiae \u2014 bact\u00e9ria associada \u00e0 mastite bovina \u2014 revelou alta diversidade de linhagens circulando em rebanhos leiteiros do Nordeste brasileiro, al\u00e9m da presen\u00e7a de genes ligados \u00e0 resist\u00eancia a antibi\u00f3ticos importantes na pr\u00e1tica veterin\u00e1ria. Os dados refor\u00e7am o alerta para vigil\u00e2ncia sanit\u00e1ria e uso mais criterioso de antimicrobianos na [&hellip;]<\/p>\n","protected":false},"author":7,"featured_media":59281,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[81,30,31],"tags":[],"class_list":["post-59280","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ifsc-sociedade","category-noticias","category-noticias-destaque"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Alerta em fazendas leiteiras no Nordeste do Brasil com bact\u00e9ria Streptococcus agalactiae provovando altos \u00edndices de mastite bovina - Portal IFSC<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www2.ifsc.usp.br\/portal-ifsc\/alerta-em-fazendas-leiteiras-no-nordeste-do-brasil-com-bacteria-streptococcus-agalactiae-provovando-altos-indices-de-mastite-bovina\/\" \/>\n<meta property=\"og:locale\" content=\"pt_BR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Alerta em fazendas leiteiras no Nordeste do Brasil com bact\u00e9ria Streptococcus agalactiae provovando altos \u00edndices de mastite bovina - Portal IFSC\" \/>\n<meta property=\"og:description\" content=\"Um amplo mapeamento gen\u00e9tico de Streptococcus agalactiae \u2014 bact\u00e9ria associada \u00e0 mastite bovina \u2014 revelou alta diversidade de linhagens circulando em rebanhos leiteiros do Nordeste brasileiro, al\u00e9m da presen\u00e7a de genes ligados \u00e0 resist\u00eancia a antibi\u00f3ticos importantes na pr\u00e1tica veterin\u00e1ria. 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