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Veterinary Vaccine In Vitro Stability Assays
BioVenic offers in vitro stability assay services for veterinary vaccines, supporting the determination of shelf life, expiration dates, and storage/transport requirements under specified packaging and environmental conditions during vaccine development. Our platform covers physical and chemical characterization (color, pH, viscosity, turbidity, solubility, particulates), antigen activity assays (ELISA and Western blotting), and stability testing via real-time, accelerated, and stress protocols. We support tailored stability study designs that track batch-to-batch consistency and identify potential component issues, delivering data to safeguard vaccine quality, efficacy, and cost-efficient production.
Our Services
Physical and Chemistry Characterization
BioVenic selects sensitivity indicators for your specific veterinary vaccine samples based on the type of product to ensure that changes occurring during storage, such as the color, pH, viscosity, dosage form, turbidity of solutions and suspensions, powder color, texture, solubility, and the presence of visible particles upon reconstitution, are appropriately monitored and assessed.
Antigen Activity Assays
BioVenic monitors the activity of key antigens in vaccines to ensure that veterinary vaccines remain effective throughout their storage period, ensuring that veterinary vaccines are produced with consistent and stable antigenic activity to provide effective immune protection.
| ELISA |
Quantifying the concentration of antigen in veterinary vaccines. Providing a relative concentration of the antigen and allowing tracking of its consistency from batch to batch. |
| Western Blotting |
Detecting the presence and size of antigens in veterinary vaccines. Ensuring consistency of their structure and morphology. |
Stability Testing Services
BioVenic actively engages in providing in vitro stability assay services for veterinary vaccines. These services involve estimating the stability of veterinary vaccine samples through a combination of real-time, accelerated, and stress testing results, which help assess the stability and shelf life of veterinary vaccines, ensuring they maintain their quality and efficacy under various environmental conditions.
| Real-time Stability Testing | Stored under recommended storage conditions and monitored until it no longer meets product performance specifications. |
| Accelerated Stability Testing |
Stored under conditions higher than the actual storage temperature, typically at 37°C or room temperature. Using these tests to understand how the product performs in the short term under deviations from normal storage conditions, providing supportive data for determining the product's shelf life and storage conditions. |
| Stress Stability Testing | Stored more severe conditions, including high temperature, light exposure, vibration, repeated freeze-thaw cycles, oxidation, and others. |
Related Research
In a study evaluating thermal stability and protective formulations for a live recombinant pseudorabies virus (PRV) vaccine, researchers systematically optimized freeze-drying protective agents to eliminate cold chain restrictions. The optimized formulation (A4), comprising 1% gelatin, 5% trehalose, 0.5% polyvinylpyrrolidone (PVP), 0.5% thiourea, and 1% sorbitol, exhibited exceptional lyoprotective efficacy. Post-lyophilization, the vaccine experienced a minimal viral titer loss of only 0.31 Lg, and a heat-induced loss of 0.42 Lg after 7 days at 37°C. Structural and physical characterizations via X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), and scanning electron microscopy (SEM) confirmed a highly porous, stable amorphous glass matrix with intact viral protein secondary structures sustained through trehalose-mediated hydrogen bonding. Under accelerated and extended thermal stress, the A4 formulation maintained viral titer losses under 1.0 Lg across 90 days at 25°C, 28 days at 37°C, and 7 days at 45°C. Based on Arrhenius kinetic modeling, the freeze-dried vaccine demonstrated a predicted shelf life of 6.61 years at 2-8°C. In vivo immunization in piglets produced high-level specific antibodies without adverse effects, proving that the lyophilized formulation effectively preserves recombinant live vaccine potency under ambient and elevated temperatures.
Fig. 1 Stages of the freeze-drying procedure.1
Why Choose Us?
- Helps identify potential problems with your veterinary vaccine components.
- Develop more reasonable storage and transportation requirements, thereby extending the effective life of veterinary vaccines.
- Ensure quality stability of veterinary vaccines.
Case Study
To establish the shelf life, storage conditions, and thermal tolerance of a lyophilized subunit vaccine candidate for livestock, A researcher executed a three-tier in vitro stability program—real-time testing at 4 °C, accelerated testing at 25 °C, and stress testing at 37 °C—sampling at 0, 1, 3, and 6 months and assessing potency retention alongside physical and chemical characterization. As shown in the figure, potency remained almost unchanged at 4 °C, declined gradually but acceptably at 25 °C, and fell steeply under 37 °C heat stress—identifying the thermal failure threshold and supporting evidence-based storage instructions.
Fig. 2 Lyophilized Vaccine Stability Under Different Storage Conditions
Frequently Asked Questions
Q1. What types of veterinary vaccines are suitable for in vitro stability assays?
A: Our stability testing services accommodate a wide range of veterinary vaccine platforms, including inactivated, live-attenuated, recombinant protein, viral vector, and nucleic acid-based (DNA/RNA) vaccines. If you are unsure whether your specific formulation or novel adjuvant system is compatible with our standard testing panels, please contact our technical support team for a tailored feasibility assessment.
Q2. What parameters and indicators do you measure during in vitro stability testing?
A: We offer comprehensive evaluation parameters to assess both physical and functional stability over time under varied conditions. Key indicators include antigen integrity, structural conformation, protein concentration, particle size distribution, aggregation state, pH changes, and potency or binding activity via immunochemical assays. Assays can also evaluate the integrity of adjuvants and carrier systems. Because stability criteria vary depending on the target species, storage conditions, and vaccine format, we recommend consulting our technical specialists to design a protocol aligned with your specific regulatory and development goals.
Q3. What sample preparation and submission guidelines should I follow?
A: Samples should be provided in their final target formulation or intermediate storage buffer, accompanied by relevant batch concentration details and safety documentation (SDS). To ensure sample integrity during transit, samples must be shipped under temperature-controlled conditions—such as on dry ice or with cold packs—that match their current storage requirements. Avoid repeated freeze-thaw cycles prior to dispatch. Because required sample volumes and concentration thresholds depend on the selected analytical techniques and study duration, please reach out to our technical support staff before shipping to confirm precise submission guidelines.
Our veterinary vaccine in vitro stability testing services play a crucial role in safeguarding the quality and efficacy of veterinary vaccines and helping reduce batch-to-batch variations, ultimately lowering the production costs of vaccines. BioVenic assists in conducting stability assessments under various environmental conditions, thereby facilitating veterinary vaccine development. Feel free to contact us to collaborate in preserving animal health and controlling disease spread!
Reference
- Liu, Yan, et al. "Screening and stability evaluation of freeze-dried protective agents for a live recombinant pseudorabies virus vaccine." Vaccines 12.1 (2024): 65. https://doi.org/10.3390/vaccines12010065. Used under CC BY 4.0. Without Modification.