Examples include, the reduced expression of the ALDOA (Fructose-bisphosphate aldolase A) gene in the longissimus muscle of Wagyu- as compared to Piedmontese-sired offsprings (Lehnert et al., 2007), and the up-regulation of CD9 (CD9 antigen) and BoLA-DQB (BoLa Class II histocompatibility antigen, DQB*101 beta chain) in the macrophage of Sahiwal compared to Holstein cattle in response to Theileria annulate infection (Glass and Jensen, 2007). This evidence concerns the gene CD9 and infection.