I found this short article about Aujeszky's disease that infected pigs in the North Island but not the South Island in New Zealand.
http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10327536&dopt=AbstractWhat Aujeszky's disease is (Pseudo-rabies):
http://www.defra.gov.uk/animalh/diseases/notifiable/disease/aujeszkys.htmIt should be noted that the disease has often been confused for "Swine Fever."
http://www.antecint.co.uk/Main/aujeszky.htmImportant thing to remember is that the disease can be passed within the pig semen.
Further note, by going through Australia's animal biosecurity meetings minutes, there are two other diseases, Porcine Reproductive and Respiratory Syndrome (PRRS) and Post-Weaning Multi-Systemic Wasting Syndrome (PMWS), that along with Classic Swine Fever (CSF) maybe passed within the semen.
http://www.affa.gov.au/corporate_docs/publications/word/market_access/biosecurity/animal/2002/2002-26a.docHopefully, this has not been an entire waste of your time.