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Freeze-dried vaccine against Rinderpest: stability and activity study
Comparative Immunology, Microbiology and Infectious Diseases
|January 1, 1985
Summary
A new freeze-dried Rinderpest vaccine, derived from modified virus in cell culture, demonstrates high infectivity and stability. This vaccine meets international standards for cattle, offering robust protection against Rinderpest.
Area of Science:
- Veterinary Virology
- Vaccine Development
- Immunology
Background:
- Rinderpest poses a significant threat to cattle populations globally.
- Effective vaccines are crucial for Rinderpest eradication efforts.
Purpose of the Study:
- To develop and characterize a stable, freeze-dried vaccine against Rinderpest.
- To evaluate the vaccine's efficacy and stability under various conditions.
Main Methods:
- Preparation of a freeze-dried vaccine using modified Rinderpest virus in calf kidney cell culture.
- Assessment of vaccine titre (10(4) CCID50/dose) and stability under thermal stress (+45°C for 3.5 days).
- Evaluation of reconstituted vaccine stability in magnesium sulphate or saline solutions at high temperatures (up to 4h at +45°C).
Main Results:
- The freeze-dried vaccine maintained a high infective titre post-lyophilization.
- The vaccine demonstrated excellent stability, preserving infectivity even after prolonged exposure to heat.
- Reconstituted vaccine remained stable in physiological saline at elevated temperatures.
- Vaccine activity in cattle, confirmed by antibody titration and challenge resistance, met WHO and OIE standards.
Conclusions:
- A stable and effective freeze-dried Rinderpest vaccine has been successfully developed.
- The vaccine's characteristics, including high titre and stability, make it suitable for field application.
- The vaccine meets stringent international requirements for Rinderpest control programs.