Co-infection with a viral pathogen (Theiler's murine encephalomyelitis virus) tended to improve host tolerance but significantly enhanced resistance to Heligmosomoides bakeri. - Zulfa IH; Fragkoudis R; Doeschl-Wilson A; Houdijk JGM; Chase-Topping M; Bailey RI; Athanasiadou S (Veterinary research communications, 2026)