Spatial and biological characteristics of between-herd transmission of Aujeszky's disease virus
Norman, H.S.; Sischo, W.M.; Dangler, C.A.; Day, R.L.
Acta Veterinaria Hungarica 42(2-3): 387-389
1994
ISSN/ISBN: 0236-6290 PMID: 7810435 Document Number: 429406
The eradication of Aujeszky's disease in Pennsylvania has failed because the modes of viral transmission between herds are unknown. In order to identify the major risk factors involved in viral transmission the proportions of operation type, density, quarantine level, and vaccination status were compared in neighbouring infected and uninfected control herds. Multivariate analysis demonstrated an elevated risk of infection with local increases in the proportion of finishing floors. A local increase in the proportion of ADV-quarantined herds was shown to be a significant risk factor, as was an increase in the proportion of vaccinated herds. A reduced risk of infection was found with local increases in the number of fattening pig farms.