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Experience with veterinary vaccines in warm climates

J J Tulasne1, P C Lefèvre, J Blancou

  • 1CIRAD-EMVT, Montpellier, France.

Developments in Biological Standardization
|January 1, 1996
PubMed
Summary

Maintaining the cold chain is crucial for veterinary vaccine efficacy in warm climates. New thermostable vaccines for rinderpest and thermotolerant options for Newcastle disease show promise for African livestock health.

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Area of Science:

  • Veterinary Medicine
  • Vaccinology
  • Animal Health

Background:

  • Veterinary vaccine manufacturing in Africa faces challenges, particularly in warm climates.
  • Maintaining the cold chain integrity from production to administration is critical for vaccine efficacy.
  • Existing vaccines for rinderpest and contagious bovine pleuropneumonia (CBPP) quality depend on uninterrupted cold transport.

Purpose of the Study:

  • To assess the impact of cold chain disruptions on veterinary vaccine quality in African field conditions.
  • To introduce and evaluate thermostable and thermotolerant vaccine candidates for key livestock diseases.
  • To explore future developments in thermoresistant veterinary vaccines.

Main Methods:

  • Field surveys and data analysis on vaccine quality during vaccination campaigns.
  • Development and integration of a thermostable rinderpest vaccine within the Pan African Rinderpest Campaign (PARC).
  • Review of prospects for thermotolerant attenuated vaccines and genetically engineered thermoresistant vaccines.

Main Results:

  • Vaccine quality for rinderpest and CBPP was satisfactory when cold transport services remained uninterrupted.
  • A thermostable rinderpest vaccine has been successfully developed and is being manufactured in African laboratories for PARC programs.
  • New thermotolerant vaccines for Newcastle disease and future thermoresistant options show potential.

Conclusions:

  • The cold chain is a significant limiting factor for veterinary vaccine use in warm climates.
  • Development and implementation of thermostable/thermotolerant vaccines are essential for improving livestock health in Africa.
  • Advances in genetic engineering offer promising avenues for highly resistant veterinary vaccines.

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