Serpens Species Bacterin – Indicated for use in conjunction with appropriate management practices to help reduce lesions and losses associated with Papillomatous digital dermatitis (Hairy Footwarts) in cattle. Dosage: Three 5 ml doses administered subcut at 4 week intervals. A 5 ml booster dose is recommended every 4 mos. 21 day slaughter withdrawal. U.S. Lic. No. 407.