Abstract
Tulathromycin, a long acting macrolide antibiotic, has demonstrated efficacy against respiratory pathogens including Mycoplasma bovis and M. hyopneumoniae. A pharmacokinetic study was performed to evaluate the clinical applicability of tulathromycin in desert tortoises following a single intramuscular dose of 5 mg/kg. A single blood sample was collected from 110 different desert tortoises at 0.25, 0.5, 1, 4, 8, 24, 48, 72, 120, and 240 h following drug administration. Plasma concentrations of the parent form of tulathromycin were measured using liquid chromatography/mass spectrometry. As each tortoise was only bled once, pharmacokinetic parameters were initially estimated using a naïve pooled data approach. Given the variability in the data, population-based compartmental modeling was also performed. Using nonparametric population compartmental modeling, a two-compartment model with first-order absorption and elimination best fit the data. An observed Cmax of 36.2 ± 29.7 μg/mL was detected at 0.25 h (observed Tmax). The elimination half-life (T½el) was long (77.1 h) resulting in detectable plasma concentrations 240 h postadministration. This study represents a preliminary step in evaluating the utility of tulathromycin in chelonian species and demonstrates that population data modeling offers advantages for estimating pharmacokinetic parameters where sparse data sampling occurs and there is substantial variability in the data.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 500-507 |
| Number of pages | 8 |
| Journal | Journal of Veterinary Pharmacology and Therapeutics |
| Volume | 37 |
| Issue number | 5 |
| DOIs | |
| State | Published - 2014 |
Fingerprint
ASJC Scopus subject areas
- veterinary(all)
- Pharmacology
Cite this
Population pharmacokinetics of a single intramuscular administration of tulathromycin in adult desert tortoises (Gopherus agassizii). / Kinney, M. E.; Lamberski, N.; Wack, R.; Foster, R.; Neely, M.; Tell, Lisa A; Gehring, R.
In: Journal of Veterinary Pharmacology and Therapeutics, Vol. 37, No. 5, 2014, p. 500-507.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Population pharmacokinetics of a single intramuscular administration of tulathromycin in adult desert tortoises (Gopherus agassizii)
AU - Kinney, M. E.
AU - Lamberski, N.
AU - Wack, R.
AU - Foster, R.
AU - Neely, M.
AU - Tell, Lisa A
AU - Gehring, R.
PY - 2014
Y1 - 2014
N2 - Tulathromycin, a long acting macrolide antibiotic, has demonstrated efficacy against respiratory pathogens including Mycoplasma bovis and M. hyopneumoniae. A pharmacokinetic study was performed to evaluate the clinical applicability of tulathromycin in desert tortoises following a single intramuscular dose of 5 mg/kg. A single blood sample was collected from 110 different desert tortoises at 0.25, 0.5, 1, 4, 8, 24, 48, 72, 120, and 240 h following drug administration. Plasma concentrations of the parent form of tulathromycin were measured using liquid chromatography/mass spectrometry. As each tortoise was only bled once, pharmacokinetic parameters were initially estimated using a naïve pooled data approach. Given the variability in the data, population-based compartmental modeling was also performed. Using nonparametric population compartmental modeling, a two-compartment model with first-order absorption and elimination best fit the data. An observed Cmax of 36.2 ± 29.7 μg/mL was detected at 0.25 h (observed Tmax). The elimination half-life (T½el) was long (77.1 h) resulting in detectable plasma concentrations 240 h postadministration. This study represents a preliminary step in evaluating the utility of tulathromycin in chelonian species and demonstrates that population data modeling offers advantages for estimating pharmacokinetic parameters where sparse data sampling occurs and there is substantial variability in the data.
AB - Tulathromycin, a long acting macrolide antibiotic, has demonstrated efficacy against respiratory pathogens including Mycoplasma bovis and M. hyopneumoniae. A pharmacokinetic study was performed to evaluate the clinical applicability of tulathromycin in desert tortoises following a single intramuscular dose of 5 mg/kg. A single blood sample was collected from 110 different desert tortoises at 0.25, 0.5, 1, 4, 8, 24, 48, 72, 120, and 240 h following drug administration. Plasma concentrations of the parent form of tulathromycin were measured using liquid chromatography/mass spectrometry. As each tortoise was only bled once, pharmacokinetic parameters were initially estimated using a naïve pooled data approach. Given the variability in the data, population-based compartmental modeling was also performed. Using nonparametric population compartmental modeling, a two-compartment model with first-order absorption and elimination best fit the data. An observed Cmax of 36.2 ± 29.7 μg/mL was detected at 0.25 h (observed Tmax). The elimination half-life (T½el) was long (77.1 h) resulting in detectable plasma concentrations 240 h postadministration. This study represents a preliminary step in evaluating the utility of tulathromycin in chelonian species and demonstrates that population data modeling offers advantages for estimating pharmacokinetic parameters where sparse data sampling occurs and there is substantial variability in the data.
UR - http://www.scopus.com/inward/record.url?scp=85006483289&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85006483289&partnerID=8YFLogxK
U2 - 10.1111/jvp.12118
DO - 10.1111/jvp.12118
M3 - Article
AN - SCOPUS:85006483289
VL - 37
SP - 500
EP - 507
JO - Journal of Veterinary Pharmacology and Therapeutics
JF - Journal of Veterinary Pharmacology and Therapeutics
SN - 0140-7783
IS - 5
ER -