30 mg/ kg/ day over 2 applications of 15 mg/ kg body weight/ day or 1 application of 30 mg/ kg/ day, during minimal 5 days or until 2 days after the symptoms have disappeared. − Serious acute infections outside of the intestinal tracts (respiratory-urinal tracts): first an injection of Tribrissen 48% or Duoprim, followed by a daily administration of Tribrissen Oral Paste at 30mg/ kg/ day over 2 applications of 15 mg/ kg body weight/ day or 1 administrations of 30 mg/ kg/ day, during minimal 5 days or until 2 days after the symptoms have disappeared.