Spatial analysis of seroconversion of sentinel cattle to bluetongue viruses in Queensland

M. P. Ward, Tim Carpenter, S. J. Johnson

Research output: Contribution to journalArticle

4 Scopus citations

Abstract

Objective: To assess quantitatively the spatial distribution of seroconversion of Queensland cattle to bluetongue viruses. Design: A sentinel herd study. Sample population: Sixty-nine sentinel herds at 30 locations. Procedure: Spatial clustering of seroconversion to bluetongue viruses was investigated during the period from 1990 to 1994. Results: Seroconversion to only two bluetongue virus serotypes, 1 and 21, was observed. The 14 herds, in which seroconversion to bluetongue virus serotype 1 was detected, were located only along the eastern coastal and sub-coastal region of Queensland, and were significantly (P < 0.05) clustered. Locations at which seroconversion to serotype 21 was detected, were not significantly clustered. The results generally agree with field observations, except for the failure to detect seroconversion to bluetongue viruses in north-western Queensland. Conclusion: Bluetongue infection of cattle in north-western Queensland may be temporally sporadic. The dominance of serotype 1 in the Queensland cattle population may be the result of differential transmission by potential vector species. Long-term surveillance programs are important for defining disease status of animal populations.

Original languageEnglish (US)
Pages (from-to)128-131
Number of pages4
JournalAustralian Veterinary Journal
Volume74
Issue number2
DOIs
StatePublished - Jan 1 1996

Keywords

  • Bluetongue virus
  • Cattle
  • Sentinel herd
  • Spatial analysis

ASJC Scopus subject areas

  • veterinary(all)

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