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Trypanosomes in a declining species of threatened Australian marsupial, the brush-tailed bettong Bettongia penicillata (Marsupialia: Potoroidae)

Published online by Cambridge University Press:  28 August 2008

A. SMITH ,
P. CLARK ,
S. AVERIS ,
A. J. LYMBERY ,
A. F. WAYNE ,
K. D. MORRIS  and
R. C. A. THOMPSON
A. SMITH*
Affiliation:
WHO Collaborating Centre for the Molecular Epidemiology of Parasitic Infections and the State Agricultural Biotechnology Centre, School of Veterinary and Biomedical Sciences, Murdoch University, South Street, Western Australia 6150, Australia
P. CLARK
Affiliation:
WHO Collaborating Centre for the Molecular Epidemiology of Parasitic Infections and the State Agricultural Biotechnology Centre, School of Veterinary and Biomedical Sciences, Murdoch University, South Street, Western Australia 6150, Australia
S. AVERIS
Affiliation:
WHO Collaborating Centre for the Molecular Epidemiology of Parasitic Infections and the State Agricultural Biotechnology Centre, School of Veterinary and Biomedical Sciences, Murdoch University, South Street, Western Australia 6150, Australia
A. J. LYMBERY
Affiliation:
WHO Collaborating Centre for the Molecular Epidemiology of Parasitic Infections and the State Agricultural Biotechnology Centre, School of Veterinary and Biomedical Sciences, Murdoch University, South Street, Western Australia 6150, Australia
A. F. WAYNE
Affiliation:
Science Division, Department of Environment and Conservation, Manjimup, WA 6258, Australia
K. D. MORRIS
Affiliation:
Science Division, Department of Environment and Conservation, Wildlife Place, Woodvale WA 6026, Australia
R. C. A. THOMPSON
Affiliation:
WHO Collaborating Centre for the Molecular Epidemiology of Parasitic Infections and the State Agricultural Biotechnology Centre, School of Veterinary and Biomedical Sciences, Murdoch University, South Street, Western Australia 6150, Australia
*
*Corresponding author: WHO Collaborating Centre for the Molecular Epidemiology of Parasitic Infections and the State Agricultural Biotechnology Centre, School of Veterinary and Biomedical Sciences, Murdoch University, South Street, Western Australia 6150, Australia. Tel: +08 9965 0908. E-mail: andrew.smith@murdoch.edu.au
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Summary

The brush-tailed bettong (Bettongia penicillata), or woylie, is a medium-sized macropod marsupial that has undergone a rapid and substantial decline throughout its home range in the Upper Warren region of Western Australia over a period of approximately 5 years. As part of an investigation into possible causes of the decline a morphologically distinct Trypanosoma sp. was discovered by light microscopy in the declining population but was absent in a stable population within the Karakamia Wildlife Sanctuary. Further investigations employing molecular methods targeting variations in the 18s rRNA gene determined that the trypanosome was novel and was also present within the Karakamia population albeit at a much lower overall prevalence and individual parasitaemia levels. Phylogenetic analysis suggests the novel Trypanosoma sp. to be closely related to other trypanosomes isolated from native Australian wildlife species. Although it appears unlikely that the parasite is solely responsible for the decline in woylie population size, it may (singularly or in conjunction with other infectious agents) predispose woylies to increased mortality.

Keywords

trypanosomeBettongia penicillatawoyliepopulation declinecharacterizationwildlifeparasite
Type
Original Articles
Information
Parasitology , Volume 135 , Issue 11 , September 2008 , pp. 1329 - 1335
Copyright
Copyright © 2008 Cambridge University Press

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References

REFERENCES

Arrea, G. C., Carmona, M. C., Bermudez, O. M. G. and Abrahams, E. (1998). Effect of Trypanosoma lewisi (Kinetoplastida: Trypanosomatidae) on the infection of white rats with Toxoplasma gondii (Eucoccidia: Sarcocystidae) oocysts. Revista De Biologia Tropical 46, 1121–1123.Google Scholar
Brown, M. J. F., Loosli, R. and Schmid-Hempel, P. (2000). Condition-dependent expression of virulence in a trypanosome infecting bumblebees. Oikos 91, 421–427.CrossRefGoogle Scholar
Clark, P. and Spencer, P. B. S. (2006). Haematological characteristics of two wild populations of quokka (Setonix brachyurus). Comparative Clinical Pathology 15, 82–86.CrossRefGoogle Scholar
Cox, F. E. G. (2001). Concomitant infections, parasites and immune response. Parasitology 122, S23–S38.CrossRefGoogle Scholar
DEC (2008). Diagnosis of recent woylie declines in southwestern Australia: progress report of the Woylie Conservation Research Project (Final Draft), pp. 1–314. Western Australian Government Department of Environment and Conservation, Perth, Western Australia.Google Scholar
Enwezor, F. N. C. and Sackey, A. K. B. (2005). Camel trypanosomosis: a review. Vererinarski Arhiv 75, 439–452.Google Scholar
Guerrero, O. M., Chinchilla, M. and Abrahams, E. (1997). Increasing of Toxoplasma gondii infections by Trypanosoma lewisi in white rats. Revista De Biologia Tropical 45, 877–882.Google ScholarPubMed
Hakkarainen, H., Ilmonen, P., Koivunen, V. and Korpimäki, E. (1998). Blood parasites and nest defence behaviour of Tengmalm's owl. Oecologia 114, 574–577.CrossRefGoogle Scholar
Hamilton, P. B., Stevens, J. R., Gidley, J., Holz, P. and Gibson, W. C. (2005). A new lineage of trypanosomes from Australian vertebrates and terrestrial bloodsucking leeches (Haemadipsidae). International Journal for Parasitology 35, 431–443.CrossRefGoogle ScholarPubMed
Higgins, D., Thompson, J., Gibson, T., Thompson, J. D., Higgins, D. G. and Gibson, T. J. (1994). CLUSTAL W: improving the sensitivity of progressive multiple sequence alignment through sequence weighting, position-specific gap penalties and weight matrix choice. Nucleic Acids Research 22, 4673–4680.Google Scholar
Hoare, C. A. (1972). The Trypanosomes of Mammals: a Zoological Monograph. Blackwell Scientific Publications, Oxford, UK.Google Scholar
Jakes, K. A., O'Donoghue, P. J. and Adlard, R. D. (2001). Phylogenetic relationships of Trypanosoma chelodina and Trypanosoma binneyi from Australian tortoises and platypuses inferred from small subunit rRNA analysis. Parasitology 123, 483–487.CrossRefGoogle Scholar
Mackerras, M. J. and Mackerras, I. M. (1959). The haematozoa of Australian birds. Australian Journal of Zoology 8, 226–260.CrossRefGoogle Scholar
Mackerras, M. J. (1961 a). The haematozoa of Australian reptiles. Australian Journal of Zoology 9, 61–122.CrossRefGoogle Scholar
Mackerras, M. J. (1961 b). The haematozoa of Australian frogs and fish. Australian Journal of Zoology 9, 123–140.CrossRefGoogle Scholar
Maraghi, S., Wallbanks, K. R. and Molyneux, D. H. (1995). Oral transmission of trypanosomes of the subgenus Herpetosoma from small mammals. Parasitology Research 81, 693–695.CrossRefGoogle ScholarPubMed
Maraghi, S. and Molyneux, D. H. (1989). Studies on cross immunity in Herpetosoma trypanosomes of Microtus, Clethrionomys and Apodemus. Parasitology Research 75, 175–177.CrossRefGoogle ScholarPubMed
Møller, A. P. and Nielsen, J. T. (2007). Malaria and risk of predation: a comparative study of birds. Ecology 88, 871–881.CrossRefGoogle ScholarPubMed
Noyes, H. A., Stevens, J. R., Teixeira, M., Phelan, J. and Holz, P. (1999). A nested PCR for the ssrRNA gene detects Trypanosoma binneyi in the platypus and Trypanosoma sp. in wombats and kangaroos in Australia. International Journal for Parasitology 29, 331–339.CrossRefGoogle ScholarPubMed
Parija, S. C. and Bhattacharya, S. (2001). Guest editorial: the tragedy of tigers: lessons to learn from Nandankana Zoo episode. Indian Journal of Medical Microbiology 19, 116–118.Google Scholar
Pedersen, A. B. and Greives, T. J. (2008). The interaction of parasites and resources cause crashes in a wild mouse population. Journal of Animal Ecology 77, 370–377.CrossRefGoogle Scholar
Pickering, J. and Norris, C. A. (1996). New evidence concerning the extinction of the endemic murid Rattus macleari from Christmas Island, Indian Ocean. Australian Mammalogy 19, 19–25.CrossRefGoogle Scholar
Smith, A., Telfer, S., Burthe, S., Bennett, M. and Begon, M. (2006). A role for vector-independent transmission in rodent trypanosome infection? International Journal for Parasitology 36, 1359–1366.CrossRefGoogle ScholarPubMed
Stevens, J., Noyes, H., Dover, G. A. and Gibson, W. C. (1999). The ancient and divergent origins of the human pathogenic trypanosomes, Trypanosoma brucei and T. cruzi. Parasitology 118, 107–116.CrossRefGoogle ScholarPubMed
Thompson, R. C. A., Owen, I. L., Puana, I., Banks, D., Davis, T. M. E. and Reid, S. A. (2003). Parasites and biosecurity: the example of Australia. Trends in Parasitology 19, 410–416.CrossRefGoogle Scholar
World Health Organization (2002). The World Health Report. World Health Organization, Geneva.Google Scholar