Balasubramaniam et al. 2012 [84] have identified twenty-three genes, such as heat shock 70 kDa protein 2 (HSPA2), septin, heat shock 60 kDa protein 1 (HSPD1), and beta-2 microglobulin differentially expressed in chicken brain tissues during infections with HPAI H5N1 and NDV. The gene discussed is HSPD1; the disease is infection.