Myco Silencer ONCE - 250 DoseMyco Silencer ONCE 250 dose Mycoplasma Hyopneumoniae Bacterin For use in healthy swine as an aid in the prevention of pneumonia caused by Mycoplasma hyopneumoniae. This product contains an inactivated culture in Microsol Diluvac Forte. DOSAGE AND DIRECTIONS: Shake well; aseptically inject IM 2 mL dose at 3 weeks or older. Alternatively give a 1 mL dose at 3 weeks or older followed by a second 1 mL dose 2 to 3 weeks later. DURATION OF IMMUNITY: