Abstract
Previous studies have shown that feral cats ( Felis catus) from rabbit haemorrhagic disease (RHD) epidemic areas in New Zealand had antibodies against RHD Virus (RHDV) and RHDV RNA was identified by nested RT-PCR from one seropositive feral cat liver. To assess whether RHDV replicates and produces clinical consequences in cats following the consumption of RHDV-infected rabbit, a challenge trial was conducted by feeding cats RHDV-infected rabbit livers. Antibodies against RHDV were detected by immunoassay from sera of cats collected 10 days after the consumption of RHDV-infected livers. Animals fed four times with RHDV-infected livers, had higher antibody titres than animals fed only once. RHDV RNA was detected by nested RT-PCR from mesenteric lymph nodes, tonsil, spleen and liver of cats fed with RHDV-infected livers. RHDV anti-genomic RNA was also detected by nested RT-PCR from mesenteric lymph nodes collected from one animal 2 days after the fourth feed. RHDV was detected by antigen ELISA from cat faeces 1–2 days after the consumption of RHDV-infected livers. Even though a large amount of RHDV has been used, cats did not show any signs of disease. Although abortive RHDV replication could not be ruled out, active RHDV replication was not demonstrated.
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