Reframing veterinary vaccine quality control: Integrating alternative assays within lifecycle-based regulatory...

Area of Science:

• Veterinary immunology and vaccinology
• Analytical chemistry and molecular biology
• Regulatory science and quality assurance

Background:

• Traditional veterinary vaccine quality assurance relies on animal-based tests, facing ethical, cost, and time constraints.
• Growing momentum supports alternative methods to replace or reduce animal use in vaccine evaluation.
• The 3Rs framework (Replacement, Reduction, and Refinement) guides the development of these novel approaches.

Purpose of the Study:

• To critically review current non-animal and reduced-animal methodologies for veterinary vaccine evaluation.
• To synthesize advances in five key methodological domains.
• To discuss scientific principles, validation, and regulatory acceptance of these alternative methods.

Main Methods:

• Review of scientific literature and regulatory guidance (WOAH, VICH).
• Synthesis of advances in molecular quantification (qPCR, dPCR, DIVA), in vitro assays, immunochemical platforms, physicochemical characterization, and multi-omics approaches.
• Analysis of practical challenges including standardization, reference materials, and reproducibility.

Main Results:

• Significant progress in molecular, cellular, immunochemical, physicochemical, and systems-level approaches for vaccine evaluation.
• Case studies demonstrate the utility of integrated strategies for various animal vaccines (e.g., FMD, rabies).
• Alignment with international regulatory standards is achievable with robust validation.

Conclusions:

• A paradigm shift towards data-rich, mechanism-informed quality control is evident in veterinary vaccinology.
• Alternative methods offer enhanced efficiency, ethical compliance, and maintain regulatory confidence.
• Integrated strategies support batch release, consistency testing, and surveillance, improving veterinary vaccine assurance.