(Zoetis Animal Health) Pirsue Sterile Solution is indicated for the treatment of clinical and subclinical mastitis in lactating dairy cattle associated with Staphylococcus species such as Staphylococcus aureus and Streptococcus species such as Streptococcus agalactiae, Streptococcus dysgalactiae, and Streptococcus uberis. Each 10 ml tube of Pirsue contains the equivalent to 50 mg prilimycin hydrochloride. Infuse one tube into each affected quarter. Repeat treatment after 24 hours. Daily treatment with Pirsue may be repeated at 24-hour intervals for up to 8 consecutive days. Prilimycin hydrochloride.