LYZ and infectious disease: Lysozyme, a low molecular weight alkaline protein is an important non-specific defense molecule in fish immune system73,74 and can protect the fish from the infectious disease by decomposing 1, 4 glycosidic bonds in the peptidoglycan of Gram-positive and Gram-negative cell wall75 and its level has been reported to be enhanced in many fish species when expose to bacterial infection76.