On-farm storage of livestock vaccines may be a risk to vaccine efficacy: A study of the performance of on-farm refrigerators to maintain the correct storage temperature

Paul D. Williams*, Gustavo Paixão

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

4 Citations (Scopus)
240 Downloads (Pure)

Abstract

Background: Livestock vaccines (LV) are often stored on-farm, in a refrigerator (fridge), prior to use and little is documented about the storage conditions during this period. As the quality of a vaccine can be impaired by storage at an incorrect temperature, the present study aimed to evaluate the on-farm performance of farm fridges to maintain the correct storage temperature. From January to August 2014, temperature data loggers were placed on selected farms fridges used to store LV (n=20) in South-West England. Results: Temperature recording data was available from 17 of the 20 farms. Fifty-nine percent of farm fridges had at least one temperature recording above 8 °C, 53% had at least one recording below 2 °C and 41% at or below 0 °C. Internal fridge temperatures attained 24 °C and dropped to -12 °C as an absolute maximum and minimum respectively. Fridges tested spent an average of 16% of the total time recorded above 8 °C. Time of the year significantly influenced the percentage of time above 8 °C. External and internal temperatures were found to be positively correlated (p<0.001). Statistical significant differences in internal and external temperatures were found between March and August. Conclusions: The majority of fridges in this study would have failed to keep any stored LV within the recommended storage temperature range. If LV are going to be stored on-farm prior to use, then urgent improvements in this part of the cold-chain are required in order to insure vaccine efficacy is not compromised.

Original languageEnglish
Article number136
Number of pages7
JournalBMC Veterinary Research
Volume14
DOIs
Publication statusPublished - 19 Apr 2018

Keywords

  • Cold chain
  • Livestock
  • Temperature monitoring
  • Vaccine storage
  • Veterinary vaccines

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