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Test performance data demonstrates utility of a cattle DIVA skin test reagent (DST-F) compatible with BCG vaccination

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posted on 2023-05-03, 22:17 authored by Gareth Jones, Timm Konnold, Shellene Hurley, Tom Holder, Sabine Steinbach, Mick Coad, Neil WedlockNeil Wedlock, Bryce BuddleBryce Buddle, Mahavair Singh, Martin Vordermeier
Bacillus Calmette-Guérin (BCG), an attenuated strain of Mycobacterium bovis (M. bovis), is the lead candidate vaccine for control of bovine tuberculosis (TB) in cattle. However, BCG vaccination sensitises cattle to bovine tuberculin, thus compromising the use of the current bovine TB surveillance tests. To address this, we have developed a diagnostic skin test that is not compromised by BCG vaccination and is able to detect BCG vaccinated animals that subsequently develop bovine TB following exposure to M. bovis. Building on previous work using ‘in house’ formulated protein cocktail reagents, we herein present test performance data for a single fusion protein (DST-F) containing the mycobacterial antigens ESAT-6, CFP-10 and Rv3615c formulated as a ‘ready to use’ reagent by a commercial manufacturer. Our results demonstrate that, unlike tuberculin reagents, a diagnostic skin test using DST-F maintained high specificity in BCG vaccinated animals. Furthermore, the DST-F skin test demonstrated a high relative sensitivity in identifying M. bovis infected animals, including those where BCG vaccination failed to prevent bovine TB pathology following experimental exposure to M. bovis. The DST-F is currently undergoing field trials in Great Britain to support its licensure and commercialisation.

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Open Access Tis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made.

Language

  • English

Does this contain Māori information or data?

  • No

Publisher

Springer Nature

Journal title

Scientific Reports

ISSN

2045-2322

Citation

Jones, G. J., Konnold, T., Hurley, S., Holder, T., Steinbach, S., Coad, M., Wedlock, D. N., Buddle, B. M., Singh, M., & Vordermeier, H. M. (2022). Test performance data demonstrates utility of a cattle DIVA skin test reagent (DST-F) compatible with BCG vaccination. Scientific Reports, 12, 12052. https://doi.org/10.1038/s41598-022-16092-8

Contract number

A25836

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