Fisiopatología de la sepsis por gram positivos

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Contenido principal del artículo

Yardany Rafael Méndez Fandiño
María Claudia Barrera C.

Resumen

Las bacterias gram positivas vienen cobrando importancia como agentes etiológicos de la sepsis siendo algunos de principales representantes Staphylococcus aureus, las cepas de S.aureus meticilino resistentes (MRSA del inglés) y el Streptococcus pyogenes o también llamado Streptococcus del grupo A invasivo (GAS). Dado que en su estructura celular presentan diversas moléculas que pueden ser reconocidas como patrones moleculares asociados a patógenos (PAMPs) como son el peptidoglicano (PNG) el ácido teicoico (LTA), las lipoproteínas; y otras que activan directamente el sistema inmune adaptativo como son los Superantígenos; los pacientes infectados pueden exponerse de manera simultánea a una respuesta inmune amplifi cada de manera sinérgica entre todos estos tipos de antígenos, que a través de vías de señalización intracelular desencadenarán la transcripción de genes codifi cadores de citocinas pro infl amatorias como el TNFα, la IL-1β, la IL-6, el INFγ, IL-8, IL-18, IL-2, IL-12, IL-10 que darán lugar a muchas de las manifestaciones clínicas de la sepsis y se vienen asociando como predictores del pronóstico de esta junto a otros marcadores moleculares de la misma.

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Biografía del autor/a (VER)

Yardany Rafael Méndez Fandiño, Hospital Regional de Duitama. Bogotá, Colombia.

Médico Internista, Epidemiólogo.MSc. Investigación Clínica

María Claudia Barrera C., Fundación Universitaria Juan N. Corpas. Bogotá, Colombia.

Médico general, Microbióloga industrial.

Referencias (VER)

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