Investigations of cattle herd breakdowns with bovine tuberculosis in four counties of England and Wales using VETNET data

L. E. Green, S. J. Cornell

Research output: Contribution to journalArticlepeer-review

43 Citations (Scopus)

Abstract

Cattle herd breakdown (HBR) with bovine tuberculosis (BTB) was investigated for farms in four counties of England and Wales outside southwest England from 1986 to early 2000. Data from the national database of TB testing history (VETNET) were used. Factors that influenced HBR included calendar time, herd size, number of cattle tested, the test type, the inter-test interval and spatial grouping of farms. Herd tests other than routine herd tests had an increased risk of HBR in all four counties. In all counties, the risk of HBR increased with calendar time and in Shropshire a test interval of 3 years was associated with an increased risk of HBR compared with a 1-year test interval. In Staffordshire and Sussex, a 4-year test interval was associated with a lower risk of HBR compared with a 1-year test interval. There was no evidence of spatial clustering of HBR in West Glamorgan (equal spatial risk in a 15-30 km radius) and weak evidence of spatial clustering in Shropshire (7-15 km) and Sussex (5-10 km). In Staffordshire, there was evidence of spatial (2-4 km) and time (3-4 years) clustering of HBR. The locally increased rate of testing following a confirmed HBR increased the detection of infected herds but did not prevent local spread in two of the four counties (Shropshire and Staffordshire) since the rate of HBR increased linearly from 1988 to 2000. The main conclusion is that there were both local and distant components of spread.

Original languageEnglish
Pages (from-to)293-311
Number of pages19
JournalPreventive Veterinary Medicine
Volume70
Issue number3-4
DOIs
Publication statusPublished - 12 Sep 2005

Bibliographical note

Funding Information:
The ISG initiated this work. We give grateful thanks to David Cox for his continued advice and input in all stages of the analysis and write up. We acknowledge with thanks the input of Alick Simmons and the VLA TB group, Andy Mitchell, VLA for the data and Graham Medley for helpful discussions. SJC acknowledges financial support from the Wellcome Trust. Appendix A

Keywords

  • Bovine tuberculosis
  • Herd breakdown
  • Risk factors
  • Space
  • Time

ASJC Scopus subject areas

  • Food Animals
  • Animal Science and Zoology

Fingerprint

Dive into the research topics of 'Investigations of cattle herd breakdowns with bovine tuberculosis in four counties of England and Wales using VETNET data'. Together they form a unique fingerprint.

Cite this