{"ok":true,"nota":{"id":"4582ac514b7bfc0d","slug":"una-nueva-tecnica-revela-que-la-bacteria-del-estomago-cambia-dentro-de-4582ac","titulo":"Una nueva técnica revela que la bacteria del estómago cambia dentro de la misma persona y resiste antibióticos","resumen":"Investigadores desarrollaron una forma de secuenciar la bacteria Helicobacter pylori directamente del tejido gástrico, sin cultivarla en laboratorio. Encontraron diferencias genéticas dentro de un mismo paciente, vinculadas a su potencial de daño y a resistencia a antibióticos.","fuente":"medrxiv","fuenteNombre":"medRxiv · preprints","color":"#1f7a4d","autor":"Liu, Y., Ni, M., Zhang, X.-S., Bass, J., Deshpande, P., Romero-Gallo, J., Chen, H., Fan, Y., Wang, D., Qiao, W., Zhang, ","url":"https://www.medrxiv.org/content/10.64898/2026.10.23.26365955v1?rss=1","imagen":"/hoy/portada/4582ac514b7bfc0d","tema":"salud","subtemas":["helicobacter pylori","cáncer de estómago","resistencia a antibióticos","genómica","gastritis"],"entidades":["medRxiv"],"formato":"dato","entretenimiento":false,"pubTs":"2026-10-26T00:00:00.000Z","indexTs":"2026-10-26T21:44:45.754Z","hash":"29ec13fff201e982493bd8ed51519743e8ee377904d828291aafa1d6d2c09086","tsa":{"time":"Oct 26 21:45:11 2026 GMT","provider":"freetsa.org","sobre":"sello"},"stats":{"views":0,"likes":0,"clicks":0,"dwell":0},"tipo":"normal","registro":"hallazgo","porQueImporta":"Esta bacteria infecta a más del 40% de la población mundial y está detrás de la mayoría de los casos de cáncer de estómago. Hasta ahora se estudiaba cultivándola, lo que podía ocultar su variedad real. Para alguien de acá, implica que un mismo tratamiento puede enfrentar una bacteria que no es una sola. Es un trabajo de método y aún no traduce un tratamiento nuevo.","quienFirma":"Preprint en medRxiv (institución principal no identificada en el resumen)","confianza":"preprint","consulta":null},"sello":{"hash":"29ec13fff201e982493bd8ed51519743e8ee377904d828291aafa1d6d2c09086","sello":"8c5aab8de2d8cb08c823d475850fc902beadc8b8e34504780524bd3e8c0236f6","beacon":{"drand":{"cadena":"8990e7a9aaed2ffed73dbd7092123d6f289930540d7651336225dc172e51b2ce","ronda":6587335,"aleatorio":"a73051692e7404084f9ff25789f872adba75b6b2ccf7d767ab32bc74031b260a","tiempo":"2026-10-26T21:44:30.000Z"},"nist":{"cadena":2,"pulso":2000861,"salida":"7270D97C2D57F9CB7EB7B095A08C5FEB9B89AB79EC9A8CA95295DF433D69A435C33F40AA23444ADF25BC5940158B01E8B7275199BCC1D89A41E5D4F68D952C8B","tiempo":"2026-10-26T21:44:00.000Z"},"noAntes":"2026-10-26T21:44:30.000Z"},"verificacion":{"drand":true,"nist":true},"tsa":{"time":"Oct 26 21:45:11 2026 GMT","provider":"freetsa.org","sobre":"sello"},"original":{"titulo":"Culture-free Helicobacter pylori genomics reveals within-host virulence heterogeneity and antibiotic resistance","descripcion":"Helicobacter pylori (Hp) infects over 40% of the world population and causes most cases of gastric cancer worldwide, yet fundamental questions about its within-host genetic diversity remain unresolved. Decades of work on Hp genomics depends on culturing clinical isolates, which can distort within-host genetic heterogeneity that informs Hp virulence and antimicrobial resistance. Culture-free alternatives have been limited by the extremely low Hp abundance in gastric tissue (usually 10^-3 to 10^-7 of total genomic DNA), making direct metagenomics prohibitively expensive and existing enrichment strategies insufficient for whole-genome recovery. Here we develop ultra-sensitive Hp sequencing (uHp","pubDate":"2026-10-26","url":"https://www.medrxiv.org/content/10.64898/2026.10.23.26365955v1?rss=1"},"indexado":"2026-10-26T21:44:45.754Z"}}