Pharmacokinetics of ceftiofur crystalline free acid after single subcutaneous administration in lactating and nonlactating domestic goats (Capra aegagrus hircus)

Elizabeth Doré, John A Angelos, Joan D Rowe, Jan L. Carlson, Scott E. Wetzlich, Hung T. Kieu, Lisa A Tell

Research output: Contribution to journalArticle

19 Scopus citations

Abstract

Six nonlactating and six lactating adult female goats received a single subcutaneous injection of ceftiofur crystalline free acid (CCFA) at a dosage of 6.6 mg/kg. Blood samples were collected from the jugular vein before and at multiple time points after CCFA administration. Milk samples were collected twice daily. Concentrations of ceftiofur and desfuroylceftiofur-related metabolites were measured using high-performance liquid chromatography. Data were analyzed using compartmental and noncompartmental approaches. The pharmacokinetics of CCFA in the domestic goat was best described by a one compartment model. Mean (±SD) pharmacokinetic parameters were as follows for the nonlactating goats: area under the concentration time curve0-∞ (159 h.μg/mL ± 19), maximum observed serum concentration (2.3 μg/mL ± 1.1), time of maximal observed serum concentration (26.7 h ± 16.5) and terminal elimination half life (36.9 h; harmonic). For the lactating goats, the pharmacokinetic parameters were as follows: area under the concentration time curve0-∞ (156 h.μg/mL ± 14), maximum observed serum concentration (1.5 μg/mL ± 0.4), time of maximal observed serum concentration (46 h ± 15.9) and terminal elimination half life (37.3 h; harmonic). Ceftiofur and desfuroylceftiofur-related metabolites were only detectable in one milk sample at 36 h following treatment. There were no significant differences in the pharmacokinetic parameter between the nonlactating and lactating goats.

Original languageEnglish (US)
Pages (from-to)25-30
Number of pages6
JournalJournal of Veterinary Pharmacology and Therapeutics
Volume34
Issue number1
DOIs
StatePublished - Feb 2011

ASJC Scopus subject areas

  • Pharmacology
  • veterinary(all)

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