The frequent presence of Enterococcus faecalis in root canals where endodontic treatment has failed suggests that this is an opportunist pathogen, whose persistence in the canals represents a significant therapeutic problem.
La presencia frecuente de Enterococcus faecalis en canales radiculares donde el tratamiento de endodoncia ha fallado sugiere que es un patógeno oportunista cuya persistencia en los canales representa un problema terapéutico signifi cativo.