Estimation of Tulathromycin Depletion in Plasma and Milk after Subcutaneous Injection in Lactating Goats Using a Nonlinear Mixed-effects Pharmacokinetic Modeling Approach

BACKGROUND: Extra-label use of tulathromycin in lactating goats is common and may cause violative residues in milk. The objective of this study was to develop a nonlinear mixed-effects pharmacokinetic (NLME-PK) model to estimate tulathromycin depletion in plasma and milk of lactating goats. Eight lactating goats received two subcutaneous injections of 2.5 mg/kg tulathromycin 7 days apart; blood … Continued

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