Related Experiment Videos
Injection and sampling methods for drug residue study in calf muscle
Nihon Juigaku Zasshi. the Japanese Journal of Veterinary Science
|October 1, 1989
Summary
Ampicillin (ABPC) injected into specific calf muscle locations remained localized, diffusing along muscle fibers but not radially. Drug residue studies should sample injected muscle layers, considering diffusion direction.
Area of Science:
- Veterinary Pharmacology
- Animal Science
- Drug Residue Analysis
Background:
- Intramuscular drug administration is common in livestock.
- Understanding drug diffusion is crucial for efficacy and residue assessment.
- Ampicillin (ABPC) is a widely used antibiotic in veterinary medicine.
Purpose of the Study:
- To determine the intramuscular distribution and diffusion of ampicillin (ABPC) in calves.
- To establish appropriate sampling methods for ampicillin residue studies in bovine muscle tissue.
Main Methods:
- Calves received intramuscular injections of ampicillin (ABPC) suspensions in gluteal and femoral regions.
- Animals were euthanized at specific time points (1 hour, 3 days) post-injection.
- Muscle tissue samples were analyzed to confirm drug location and diffusion patterns.
Main Results:
- Ampicillin (ABPC) was localized to the injected muscle layer, diffusing longitudinally along muscle fibers.
- No significant radial diffusion into adjacent muscle tissues was observed, even after 3 days.
- Drug concentration varied within the injected muscle layer.
Conclusions:
- Intramuscular ampicillin (ABPC) exhibits limited diffusion in bovine muscle tissue.
- Sampling strategies for residue studies should target the injected muscle layer, accounting for longitudinal diffusion.
- Proposed sampling involves collecting injected muscle and surrounding tissue for validation.