Immune suppression by nematodes can, for instance, facilitate tuberculosis infections in African buffalo (Syncerus caffer84), a reduction of parasite-specific IgA antibodies following co-infection with multiple intestinal parasites increases parasite burden in wild wood mice (Apodemus sylvaticus85), and concurrent bacterial and viral infections shape the gut microbial diversity in bank voles (Myodes glareolus86). This evidence concerns the gene CD79A and viral infectious disease.