Author(s): Fatemeh Arabi, Mojtaba Imandar, Masoud Negahdary, Mohsen Imandar, Mahdi Torkamani Noughabi
The antimicrobial properties of zinc oxide nanopart icles were investigated using Listeria monocytogene s. Crystalline structure, morphology and nanoparticles size estimation of zinc oxidewere conducted by X-r ay diffraction (XRD), transmission electron microscopy (TEM) and scanning electron microscope (SEM). Anti bacterial activity of these zinc oxide nanoparticles as a fun ction of particles concentration against gram-posit ive bacterium Listeria monocytogeneswas carried out in liquid as well as solid growth media. Theanti-bactericidal ef fect of zinc oxide nanoparticles were compared based on colony f orming units (CFU) and minimum inhibitory concentra tion (MIC) and minimum bactericidal concentration (MBC) of nanoparticles dispersed in batch cultures. These results suggest that zinc oxide nanoparticles can be used a s effective growth inhibitors against Listeria mono cytogenes, making them applicable to reduce of Listeria monocy togenes infections.