Summary
Field isolates of suid herpesvirus 1 (Aujeszky's disease virus) from Poland and Hungary were identified by restriction fragment pattern analysis as derivatives of attenuated vaccine strains. The Polish isolates were found to be related to the BUK-TK-900 strain (Suivac A) which is widely used as a live vaccine in Poland, and the Hungarian isolates were related to the Bartha K-61 vaccine strain widely used in Hungary. Pigs experimentally infected with derivatives of BUK-TK-900 or BUK-TK-900 itself were found to develop gI-antibodies, while pigs infected with derivatives of Bartha K-61 showed a gI-negative response.
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Christensen, L.S., Medveczky, I., Strandbygaard, B.S. et al. Characterization of field isolates of suid herpesvirus 1 (Aujeszky's disease virus) as derivatives of attenuated vaccine strains. Archives of Virology 124, 225–234 (1992). https://doi.org/10.1007/BF01309804
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DOI: https://doi.org/10.1007/BF01309804