Question: How are agar plates inoculated for disk diffusion testing of antiseptics and disinfectants? Multiple Choice A swab is used to inoculate the entire surface of the plate, producing a lawn of growth. A four-way quadrant streak is done using a swab. A loop is used to prepare a lawn of growth by inoculating the entire surface of the plate. A loop is used to prepare a 4-way quadrant streak.