Hs. Norman et al., SPATIAL AND BIOLOGICAL CHARACTERISTICS OF BETWEEN-HERD TRANSMISSION OF AUJESZKYS-DISEASE VIRUS, Acta veterinaria Hungarica, 42(2-3), 1994, pp. 387-389
The eradication of Aujeszky's disease virus (ADV) in Pennsylvania has
suffered because the modes of viral transmission between herds are unk
nown. Our objective was to identify the major risk factors involved in
viral transmission by comparing proportions of operation type, densit
y, quarantine level, and vaccination status of neighboring herds for i
nfected case and uninfected control herds. Multivariate analysis demon
strated an elevated risk of infection with local increases in the prop
ortion 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 vaccinating herds. A reduced risk of in
fection was found with local increases in the number of feeder pig pro
ducer operations.