The technological growth of nanotechnology has been brought a tremendous opportunity for the development of nanomaterials with specific peculiar properties for use as antimicrobial agents. Nowadays, Bacterial infections related diseases are a serious health problem. It has gained the attention of human beings in worldwide. In this book it's discussed about "ANTIBACTERIAL ACTIVITY AND CYTOTOXICITY OF PURE ZnO AND POLYSACCHARIDES ENCAPSULATED ZnO NANOPARTICLES".