2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/3645We present a summary on the discovery of active galactic nuclei in mid- and far-infrared deep surveys with use of the Infrared Space Observatory.10 pages, 1 figure. To appear in the proceedings of "AGN Surveys" (IAU Colloquium 184)AstrophysicsDiscovery of Active Galactic Nuclei in Mid- and Far-Infrared Deep Surveys with ISOtext