NDUFA9 and viral infectious disease: The hemocytes CC0-merged, CC2-merged, CC3-merged, CC4-merged, CC5-merged, CC6-merged, CC7-merged, CC8-merged, CC9-merged and CC10-merged mainly clustered in CC0, CC1, CC2, CC3, CC5, CC6, CC7, CC9, CC10 and CC11 of healthy crayfish (Table 4), suggesting that hemocytes CC0, CC1, CC2, CC3, CC5, CC6, CC7, CC9, CC10 and CC11 might be involved in the immune responses of crayfish, of which CC7 and CC9 were specific to viral infection and clusters CC5 and CC11 were specific to bacteral infection.