In wild animals, specific MHC alleles were linked to resistance/susceptibility or intensity of infection to malaria in house sparrows (Bonneaud et al., 2006; Loiseau et al., 2008), great tits (Sepil et al., 2013), blue tits (Westerdahl et al., 2013), great reed warblers (Westerdahl et al., 2012; Westerdahl et al., 2005) and to coccidiosis in the red junglefowl (Worley et al., 2010). The gene discussed is HLA-C; the disease is infection.