Apparatuses and methods for applying an antimicrobial agent to food products include methods and systems for limiting the escape of antimicrobial agent to the environment during antimicrobial treatment of the food product. In one embodiment, a series of cabinet panels moves in line with the passing food product and forms an enclosure around the food product by means of panels closing ahead of and behind the food product. In another embodiment, the direction and spray pattern of positively charged aerosolized antimicrobial particles is controlled by attracting the particles to preselected negatively charged regions within a treatment volume.