Abstract The invention relates to an apparatus (7) for the treat¬ment of plastics material containers, wherein the apparatus (7) has at least one movable support (2) which is arranged in an isolator room (9) to which a sterilization agent is capable of being supplied, wherein the isolator room (9) is constructed in at least two parts and a first boundary (15) of the isolator room (9) is fixed in position during a movement of the movable support (2), whereas a second boundary (14) of the isolator room (9) is connected to the apparatus (7) in such a way that it is suitable, during a movement of the movable support (2), for following this movement, wherein the apparatus (7) has at least one device (12, 13) for supplying the sterilization agent into the isolator room (9), which device (12, 13) is suitable for acting with the sterilization agent upon the parts of the apparatus (7) movable relative to this device (12, 13) and situated inside the isolator room (9). (Figure 2)
