Test and vaccinate or remove: Methodology and preliminary results from a badger intervention research project
2021
Menzies, F. D. (Fraser D.) | McCormick, Carl M. | O'Hagan, Maria J. H. | Collins, Shane F. | McEwan, Jim | McGeown, Clare F. | McHugh, Geraldine E. | Hart, Colin D. | Stringer, Lesley A. | Molloy, Colm | Burns, Gareth | McBride, Stewart J. | Doyle, Liam P. | Courcier, Emily A. | McBride, Kathryn R. | McNair, James K. | Thompson, Suzan | Corbett, David M. | Harwood, Roland G. | Trimble, Nigel A.
Background: In the British Isles, it is generally accepted that the Eurasian badger (Meles meles) plays a role in the maintenance of bovine tuberculosis (bTB) in cattle. Non‐selective culling is the main intervention method deployed in controlling bTB in badgers along with smaller scale Bacillus Calmette–Guérin (BCG) vaccination areas. This paper describes the use of selective badger culling combined with vaccination in a research intervention trial. Methods: In Northern Ireland, a 100 km² area was subjected to a test and vaccinate or remove (TVR) badger intervention over a 5‐year period. Badgers were individually identified and tested on an annual basis. Physical characteristics and clinical samples were obtained from each unique badger capture event. Results: A total of 824 badgers were trapped with 1520 capture/sampling events. There were no cage‐related injuries to the majority of badgers (97%). A low level of badger removal was required (4.1%–16.4% annually), while 1412 BCG vaccinations were administered. A statistically significant downward trend in the proportion of test positive badgers was observed. Conclusion: This is the first project to clearly demonstrate the feasibility of cage side testing of badgers. The results provide valuable data on the logistics and resources required to undertake a TVR approach to control Mycobacterium bovis in badgers.
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