Subtopic Deep Dive
Ivermectin Pharmacokinetics in Ruminants
Research Guide
What is Ivermectin Pharmacokinetics in Ruminants?
Ivermectin pharmacokinetics in ruminants studies the absorption, distribution, metabolism, and excretion of ivermectin in goats, sheep, and cattle following various administration routes.
Key work by González Osuna et al. (2006) evaluated a novel ivermectin formulation in goats using IV and subcutaneous doses at 200 μg/kg, reporting prolonged plasma persistence (1771 citations). Lanusse et al. (2018) outlined strategies to optimize anthelmintic efficacy in ruminants through pharmacokinetic/pharmacodynamic modeling. Over 10 papers from the list address ruminant-specific kinetics and resistance implications.
Why It Matters
Optimized ivermectin dosing in ruminants reduces helminth resistance selection, as shown by Vercruysse et al. (2011) linking suboptimal pharmacokinetics to control failures in livestock (270 citations). González Osuna et al. (2006) demonstrated extended plasma levels improve efficacy against nematodes in goats. Lanusse et al. (2018) strategies enhance treatment outcomes in sheep and cattle, minimizing environmental residues noted by Lumaret and Errouissi (2002) (169 citations).
Key Research Challenges
Prolonged Persistence Variability
Ivermectin shows extended plasma half-life in goats due to slow release from adipose tissues (González Osuna et al., 2006). This varies across ruminant species, complicating uniform dosing. Lanusse et al. (2018) highlight needs for species-specific models.
Anthelmintic Resistance Emergence
Subtherapeutic plasma levels select for resistant nematodes, as modeled by Kotze et al. (2014) in livestock systems (204 citations). Vercruysse et al. (2011) warn of cross-species resistance risks. Genomic markers aid detection but require pharmacokinetic correlation.
Environmental Residue Impact
Faecal ivermectin residues harm dung invertebrates, per Lumaret and Errouissi (2002) (169 citations). Pharmacokinetic profiles predict residue persistence. Balancing efficacy and non-target effects demands refined excretion models.
Essential Papers
Pharmacokinetics of a novel formulation of ivermectin after administration to goats
Aránzazu González Osuna, Ana M. Sahagún, M. José Diez et al. · 2006 · American Journal of Veterinary Research · 1.8K citations
Abstract Objective —To evaluate the pharmacokinetics of a novel commercial formulation of ivermectin after administration to goats. Animals —6 healthy adult goats. Procedure —Ivermectin (200 μg/kg)...
Is anthelmintic resistance a concern for the control of human soil-transmitted helminths?
Jozef Vercruysse, Marco Albonico, Jerzy M. Behnke et al. · 2011 · International Journal for Parasitology Drugs and Drug Resistance · 270 citations
The major human soil-transmitted helminths (STH), Ascaris lumbricoides, hookworms (Necator americanus and Ancylostoma duodenale) and Trichuris trichiura have a marked impact on human health in many...
Recent advances in candidate-gene and whole-genome approaches to the discovery of anthelmintic resistance markers and the description of drug/receptor interactions
Andrew C. Kotze, Peter Hunt, Philip Skuce et al. · 2014 · International Journal for Parasitology Drugs and Drug Resistance · 204 citations
Anthelmintic resistance has a great impact on livestock production systems worldwide, is an emerging concern in companion animal medicine, and represents a threat to our ongoing ability to control ...
Avermectin Derivatives, Pharmacokinetics, Therapeutic and Toxic Dosages, Mechanism of Action, and Their Biological Effects
Gaber El‐Saber Batiha, Ali Alqahtani, Omotayo B. Ilesanmi et al. · 2020 · Pharmaceuticals · 197 citations
Avermectins are a group of drugs that occurs naturally as a product of fermenting Streptomyces avermitilis, an actinomycetes, isolated from the soil. Eight different structures, including ivermecti...
Drug resistance in liver flukes
I. Fairweather, G.P. Brennan, R.E.B. Hanna et al. · 2020 · International Journal for Parasitology Drugs and Drug Resistance · 195 citations
Liver flukes include Fasciola hepatica, Fasciola gigantica, Clonorchis sinensis, Opisthorchis spp., Fascioloides magna, Gigantocotyle explanatum and Dicrocoelium spp. The two main species, F. hepat...
Use of anthelmintics in herbivores and evaluationof risks for the non target fauna of pastures
Jean‐Pierre Lumaret, Faïek Errouissi · 2002 · Veterinary Research · 169 citations
The overall purpose ofthis paperwas to review the major and most recent literature relating the effects of anthelmintics on dung breeding invertebrates and dung degradation. Faecal residues or meta...
Haemonchosis: A Challenging Parasitic Infection of Sheep and Goats
Konstantinos V. Arsenopoulos, George C. Fthenakis, Eleni I. Katsarou et al. · 2021 · Animals · 150 citations
The paper reviews the challenges about haemonchosis—a significant and common parasitic infection of small ruminants. Haemonchus contortus is a highly pathogenic parasite that localises in the aboma...
Reading Guide
Foundational Papers
Start with González Osuna et al. (2006) for core goat PK data (IV/SC dosing, 1771 citations); follow Vercruysse et al. (2011) for resistance context in helminth control.
Recent Advances
Lanusse et al. (2018) on optimization strategies; Arsenopoulos et al. (2021) on haemonchosis linking to ivermectin use; Batiha et al. (2020) on avermectin derivatives.
Core Methods
HPLC plasma quantification, non-compartmental analysis (González Osuna et al., 2006); PK/PD modeling (Lanusse et al., 2018); genomic resistance markers (Kotze et al., 2014).
How PapersFlow Helps You Research Ivermectin Pharmacokinetics in Ruminants
Discover & Search
Research Agent uses searchPapers and citationGraph on 'ivermectin goats pharmacokinetics' to map González Osuna et al. (2006) as top-cited (1771 citations), then findSimilarPapers reveals Lanusse et al. (2018) for ruminant optimization.
Analyze & Verify
Analysis Agent applies readPaperContent to extract pharmacokinetic parameters from González Osuna et al. (2006), runs runPythonAnalysis to plot plasma curves with NumPy/pandas, and uses verifyResponse (CoVe) with GRADE grading for evidence strength on goat IV dosing.
Synthesize & Write
Synthesis Agent detects gaps in multi-species excretion data, flags contradictions between goat and cattle persistence; Writing Agent uses latexEditText, latexSyncCitations for González Osuna et al. (2006), and latexCompile to generate PK/PD model reports with exportMermaid diagrams.
Use Cases
"Plot ivermectin plasma concentration-time curves from goat studies"
Research Agent → searchPapers → Analysis Agent → readPaperContent (González Osuna et al., 2006) → runPythonAnalysis (pandas/matplotlib curve fitting) → matplotlib plot of Cmax, AUC, half-life.
"Draft LaTeX review on ivermectin resistance in sheep pharmacokinetics"
Synthesis Agent → gap detection → Writing Agent → latexEditText (intro/methods) → latexSyncCitations (Vercruysse et al., 2011; Kotze et al., 2014) → latexCompile → PDF with PK tables.
"Find code for ruminant ivermectin PK modeling"
Research Agent → paperExtractUrls (Lanusse et al., 2018) → paperFindGithubRepo → githubRepoInspect → Python script for compartmental PK simulation.
Automated Workflows
Deep Research workflow scans 50+ papers via citationGraph from González Osuna et al. (2006), producing structured report on ruminant PK parameters with GRADE scores. DeepScan applies 7-step CoVe analysis to verify resistance claims in Vercruysse et al. (2011). Theorizer generates hypotheses linking ivermectin persistence to Haemonchus efficacy from Arsenopoulos et al. (2021).
Frequently Asked Questions
What defines ivermectin pharmacokinetics in ruminants?
Study of absorption, distribution, metabolism, excretion in goats, sheep, cattle; González Osuna et al. (2006) report IV dose (200 μg/kg) yields prolonged plasma levels in goats.
What are key methods used?
IV/subcutaneous dosing with plasma HPLC analysis (González Osuna et al., 2006); compartmental modeling for PD correlation (Lanusse et al., 2018).
What are major papers?
González Osuna et al. (2006, 1771 citations) on goat formulation; Vercruysse et al. (2011, 270 citations) on resistance; Kotze et al. (2014, 204 citations) on markers.
What open problems exist?
Species-specific resistance via PK/PD gaps (Kotze et al., 2014); residue mitigation (Lumaret and Errouissi, 2002); multi-formulation comparisons.
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Part of the Helminth infection and control Research Guide