Previously, we showed that
Legionella pneumophila
secretes rhizoferrin, a polycarboxylate siderophore that promotes bacterial growth in iron-deplete media and the murine lung. Yet, past studies failed to identify a role for the rhizoferrin biosynthetic gene (
lbtA
) in
L. pneumophila
infection of host cells, suggesting the siderophore’s importance was solely linked to extracellular survival.
Desde un enfoque del discurso sociocultural a partir de entrevistas narrativas, este texto explora el papel de la metáfora como elemento de microsignificación en conjuntos discursivos verbalizados sobre éxito y fracaso por adultos mayores. El trabajo muestra cómo la metáfora, al ser un elemento lingüístico-discursivo, licencia y ayuda a configurar el análisis semántico-cognitivo del discurso a partir de macroproposiciones que forman significados globales o macroestructuras semánticas que comúnmente no suelen ser consideradas como elementos primordiales.
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