Objective: To establish a matrix-assisted laser desorption ionization time of flight mass spectrometry(MALDITOF-MS) method to detect Campylobacter jejuni and Listeria monocytogenes in environmental samples from a chicken farm and samples from commercial live chickens using VITEK MS. Methods: The suspicious colonies of both bacteria were separated from the samples, and then suspended in matrix solutions consisting of mixtures of different proportions of ethanol, acetonitrile and water before identification b...