Seropositivity to rabbit haemorrhagic disease virus in non-target mammals during periods of viral activity in a population of wild rabbits in New Zealand
J. Henning A C , P. R. Davies A and J. Meers BA EpiCentre, Massey University, Palmerston North, PO Box 11-222, New Zealand.
B University of Queensland, St Lucia, Qld 4072, Australia.
C Corresponding author. Present address: School of Veterinary Science, University of Queensland, Brisbane, Qld 4072, Australia. Email: J.Henning@uq.edu.au
Wildlife Research 33(4) 305-311 https://doi.org/10.1071/WR03061
Submitted: 8 July 2003 Accepted: 20 April 2006 Published: 27 June 2006
Abstract
As part of a longitudinal study of the epidemiology of rabbit haemorrhagic disease virus (RHDV) in New Zealand, serum samples were obtained from trapped feral animals that may have consumed European rabbit (Oryctolagus cuniculus) carcasses (non-target species). During a 21-month period when RHDV infection was monitored in a defined wild rabbit population, 16 feral house cats (Felis catus), 11 stoats (Mustela erminea), four ferrets (Mustela furo) and 126 hedgehogs (Erinaceus europaeus) were incidentally captured in the rabbit traps. The proportions of samples that were seropositive to RHDV were 38% for cats, 18% for stoats, 25% for ferrets and 4% for hedgehogs. Seropositive non-target species were trapped in April 2000, in the absence of an overt epidemic of rabbit haemorrhagic disease (RHD) in the rabbit population, but evidence of recent infection in rabbits was shown. Seropositive non-target species were found up to 2.5 months before and 1 month after this RHDV activity in wild rabbits was detected. Seropositive predators were also trapped on the site between 1 and 4.5 months after a dramatic RHD epidemic in February 2001. This study has shown that high antibody titres can be found in non-target species when there is no overt evidence of RHDV infection in the rabbit population, although a temporal relationship could not be assessed statistically owning to the small sample sizes. Predators and scavengers might be able to contribute to localised spread of RHDV through their movements.
Acknowledgments
We thank Robin Chrystall and George Robinson from Himatangi, who gave permission to conduct this study on their property. This research was supported financially by the Foundation for Research, Science and Technology, New Zealand; the Institute of Veterinary, Animal and Biomedical Sciences, Massey University; and by the German Academic Exchange Service. All field work involving live animals was approved by the Massey University Animal Ethics Committee.
Barlough, J. E. , Berry, E. S. , Skilling, D. E. , and Smith, A. W. (1986a). The marine calicivirus story. Part I. Compendium on Continuing Education for the Practicing Veterinarian 8, F5–F14.
Carman, J. A. , Garner, M. G. , Catton, M. G. , Thomas, S. , Westbury, H. A. , Cannon, R. M. , Collins, B. J. , and Tribe, I. G. (1998). Viral haemorrhagic disease of rabbits and human health. Epidemiology and Infection 121, 409–418.
| Crossref | GoogleScholarGoogle Scholar | PubMed |
Jones, E. (1977). Ecology of the feral cat, Felis catus (L.), (Carnivora: Felidae) on MacQuarie Island. Australian Wildlife Research 4, 249–262.
| Crossref | GoogleScholarGoogle Scholar |
Löliger, H. Ch. (1990). Aktuelle erkrankungen der hauskaninchen-diagnose und bekämpfung Der Praktischer Tierarzt 5, 42–54. [In German]
Molsher, R. , Newsome, A. , and Dickman, C. (1999). Feeding ecology and population dynamics of the feral cat (Felis catus) in relation to the availability of prey in central-eastern New South Wales. Wildlife Research 26, 593–607.
| Crossref | GoogleScholarGoogle Scholar |
Ohlinger, V. F. , Haas, B. , and Thiel, H. J. (1993). Rabbit haemorrhagic disease (RHD): characterisation of the causative calicivirus. Veterinary Research 24, 103–116.
| PubMed |
Smith, A. W. , and Boyt, P. M. (1990). Caliciviruses of ocean origin – a review. Journal of Zoo and Wildlife Medicine 21, 3–23.
Smith, A. W. , Skilling, D. E. , and Brown, R. J. (1980). Preliminary investigation of a possible lung worm (Parafilaroides decorus), fish (Girella nigricans), and marine mammal (Callorhinus ursinus) cycle for San-Miguel sea lion virus type-5. American Journal of Veterinary Research 41, 1846–1850.
| PubMed |
Smith, A. W. , Skilling, D. E. , Cherry, N. , Mead, J. H. , and Matson, D. O. (1998a). Calicivirus emergence from ocean reservoirs: zoonotic and interspecies movements. Emerging Infectious Diseases 4, 13–20.
| PubMed |
Smith, A. W. , Berry, E. S. , Skilling, D. E. , Barlough, J. E. , Poet, S. E. , Berke, T. , Mead, J. , and Matson, D. O. (1998b). In vitro isolation and characterisation of a calicivirus causing a vesicular disease of the hands and feet. Clinical Infectious Diseases 26, 434–439.
| PubMed |
Smith, A. W. , Skilling, D. E. , Matson, D. O. , Kroeker, A. D. , Stein, D. A. , Berke, T. , and Iversen, P. L. (2002). Detection of vesicular exanthema of swine-like calicivirus in tissues from a naturally infected spontaneously aborted bovine fetus. Journal of the American Veterinary Medical Association 220, 455–458.
| Crossref | GoogleScholarGoogle Scholar | PubMed |
Smith, G. P. , Ragg, J. R. , Moller, H. , and Waldrup, K. A. (1995). Diet of feral ferrets (Mustela furo) from pastoral habitats in Otago and Southland, New Zealand. New Zealand Journal of Zoology 22, 363–369.
Wyatt, R. G. , Greenberg, H. G. , Dalgard, D. W. , Allwood, W. P. , Sly, D. L. , Thorhill, T. S. , Chanock, R. M. , and Kapikian, A. Z. (1978). Experimental infection of chimpanzees with the Norwalk agent of epidemic viral gastroenteritis. Journal of Medical Virology 2, 89–96.
Zheng, T. , Lu, G. , Napier, A. M. , and Lockyer, S. T. (2003). No virus replication in domestic cats fed with RHDV-infected rabbit livers. Veterinary Microbiology 95, 61–73.
| Crossref | GoogleScholarGoogle Scholar | PubMed |