Previous studies have shown that PYURF is a gene within a region that plays an important role in immunity underlying the resistance to gastrointestinal parasites in Australian sheep (OAR6: 34.7–39.2 Mb; [29]) as well as in Swedish cattle breeds, where PYURF gene is responsible for resistance to diseases and bacterial infections (BTA06: 37.64–37.72 Mb; [63]). The gene discussed is PYURF; the disease is bacterial infectious disease.