Accepted Manuscript Title: Vector-borne pathogens in arctic foxes, Vulpes lagopus, from Canada Author: Patricia E. Mascarelli, Stacey A. Elmore, Emily J. Jenkins, Ray T. Alisauskas, Mary Walsh, Edward B. Breitschwerdt, Ricardo G. Maggi PII: DOI: Reference:
S0034-5288(14)00352-X http://dx.doi.org/doi: 10.1016/j.rvsc.2014.12.011 YRVSC 2787
To appear in:
Research in Veterinary Science
Received date: Accepted date:
27-8-2013 11-12-2014
Please cite this article as: Patricia E. Mascarelli, Stacey A. Elmore, Emily J. Jenkins, Ray T. Alisauskas, Mary Walsh, Edward B. Breitschwerdt, Ricardo G. Maggi, Vector-borne pathogens in arctic foxes, Vulpes lagopus, from Canada, Research in Veterinary Science (2014), http://dx.doi.org/doi: 10.1016/j.rvsc.2014.12.011. This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.
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SHORT COMMUNICATION: Vector-borne pathogens in arctic foxes, Vulpes lagopus,
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from Canada
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Patricia E. Mascarelli1, Stacey A. Elmore2, Emily J. Jenkins2, Ray T. Alisauskas3; Mary Walsh1
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Edward B. Breitschwerdt1, Ricardo G. Maggi*1
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Translational Research College of Veterinary Medicine, North Carolina State University. North
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Carolina, USA
Intracellular Pathogens Research Laboratory (IPRL), Center for Comparative Medicine and
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Saskatoon, Saskatchewan, Canada S7N EB4
Department of Veterinary Microbiology, University of Saskatchewan, 52 Campus Drive,
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5E2, Canada
Department of Biology, University of Saskatchewan, 112 Science Place, Saskatoon, SK, S7N
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*Corresponding Author
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Dr. Ricardo G. Maggi, College of Veterinary Medicine, North Carolina State University, 1060
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William Moore Dr., Raleigh, NC 27606, Phone: 919-513-8273, Fax: 919-513-6336, e-mail:
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[email protected] 21 22 23
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Highlights: We report three vector-borne pathogens in arctic foxes, Vulpes lagopus, from Canada. Bartonella henselae is the most prevalent pathogen found (3/28) Infection with E. canis, an Anaplasma spp., and M. haemocanis was found in single individuals. This is preliminary evidence of vector borne pathogens in foxes from the Canadian arctic ecosystem.
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Because of the relatively low biodiversity within arctic ecosystems, arctic foxes, Vulpes lagopus,
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could serve as sentinels for the study of changes in the ecology of vector-borne zoonotic
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pathogens. The objective of this study was to determine the molecular prevalence of 5 different
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genera of vector borne pathogens (Anaplasma, Babesia, Bartonella, Ehrlichia, and Hemotropic
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Mycoplasma spp.) using blood collected from 28 live-trapped arctic foxes from the region of
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Karrak Lake, Nunavut, Canada. Bartonella henselae (n=3), Mycoplasma haemocanis (n=1),
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Ehrlichia canis (n=1), and an Anaplasma sp. (n=1) DNA were PCR amplified and subsequently
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identified by sequencing. This study provides preliminary evidence that vector borne pathogens,
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not typically associated with the arctic ecosystem, exist at low levels in this arctic fox
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population, and that vector exposure, pathogen transmission dynamics, and changes in the
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geographic distribution of pathogens over time should be investigated in future studies.
Abstract
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Keywords
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Foxes; Canada; vector-borne; Bartonella; Mycoplasma; Ehrlichia; zoonosis
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SHORT COMMUNICATION
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The relatively low biodiversity within arctic ecosystems could allow arctic foxes, Vulpes
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lagopus, to serve as sentinels for the assessment of climate change on the emergence and ecology
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of vector-borne zoonotic pathogens. In Europe, arctic fox numbers have declined due to
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anthropogenic factors such as increased hunting pressure (Angerbjörn et al., 2004), the
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emergence of zoonotic pathogens such as ear canker mites, the introduction of domestic cats,
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dogs, and farmed foxes (Gunnarsson et al., 1991; Skirnisson et al., 1993), the introduction of
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rabies derived from domestic dog importation (Macdonald et al., 2011; Nyberg et al., 1992),
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leptospirosis introduced by cattle farming and farm-breed foxes (Egorov et al., 1996), and
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bladderworms, also introduced via farm-breed foxes (Fernandez-Aguilar et al., 2010).
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In North America, only the trophic interactions and intestinal parasite fauna of the arctic foxes of
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the Canadian Arctic Tundra region have been described (Elmore et al., 2013; Samelius et al.,
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2007). As a component of ongoing population and pathogen studies in the region of Karrak
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Lake, Nunavut, Canada, blood samples from 28 arctic foxes were analyzed to determine the
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molecular prevalence of 5 different genera of vector borne pathogens (Anaplasma, Babesia,
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Bartonella, Ehrlichia, and Hemotropic Mycoplasma spp.) using DNA amplification. Briefly,
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Bartonella testing was performed by PCR amplification of blood, and blood culture DNA
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samples (using the BAPGM platform) as described previously (Duncan et al., 2007; Perez Vera
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et al., 2013). Anaplasma, Babesia, Ehrlichia, and hemotropic Mycoplasma spp. infection in
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blood samples was tested also by PCR amplification aiming at the 16SrRNA gene (Mycoplasma,
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Ehrlichia, and Anaplasma) or the 18SrRNA gene (Babesia) (Compton et al., 2012; Maggi et al.,
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2013a; Maggi et al., 2013b; Maggi et al., 2013c).
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Overall, Anaplasma, Bartonella, Ehrlichia, and hemotropic Mycoplasma spp. DNA was
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successfully amplified and sequenced from individual Arctic foxes, whereas no Babesia DNA
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was amplified from any sample (Table 1). Bartonella henselae was isolated from three of 28
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foxes using an enrichment blood culture, whereas one fox each was infected with an Anaplasma
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sp., Ehrlichia canis, and Mycoplasma haemocanis. DNA sequencing confirmed infection with B.
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henselae SA2 in two foxes with 523/523 bp (100%) similarity to Genbank accession AF369529 ,
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and B. henselae H1, with 494/494 bp (100%) similarity to Genbank accession NC_005956 in one
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arctic fox. The E. canis DNA sequence shared 336/336 bp (100%) similarity to Genbank
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accession NC_007354. The M. haemocanis DNA sequence had 100% (506/506 bp) similarity to
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M. haemocanis (GenBank accession AY529641). To the author’s knowledge, prior studies have
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not investigated any of these pathogens in Arctic foxes; therefore, it is not possible to determine
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whether these vector borne infections have been present previously in Arctic foxes or whether
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these organisms represent a more recent introduction of the pathogens or their respective vectors.
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Arctic foxes in the Karrak Lake infrequently interact with domestic dogs and red foxes, whereas
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high level exposure to goose fleas (Ceratophyllus vagabundus vagabundus) was recently
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reported (Harriman, 2008; Harriman et al., 2011). Ticks from migratory birds could be another
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mode of transmission.
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In the northwestern Canadian Arctic, host and pathogen diversity are considered low as
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compared to tropical and subtropical regions of the world. Therefore, Arctic animals, such as the
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Arctic fox, might be susceptible to the direct or indirect consequences of human activities, such
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as changes in environmental temperature resulting in the invasion of new pathogens to the biota
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(Davidson et al., 2011). This study provided preliminary evidence that vector borne pathogens,
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not typically associated with the arctic ecosystem, existed at low levels in this Arctic fox
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population. A comprehensive ecologic approach to delineate potential impacts of climate change
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and human population dynamics on animal populations will be vital to the understanding of
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infectious disease emergence in Arctic foxes and for the implementation of wildlife conservation
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strategies. Future studies should also address vector exposure, pathogen transmission dynamics,
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and changes in the geographic distribution of pathogens over time.
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Acknowledgements:
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The authors thank Tonya Lee for editorial assistance.
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Conflict of Interest Statement:
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The authors have not conflict of interests to disclose
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Research Support:
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This research was supported in part by Bayer Animal Health and the State of North Carolina.
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Angerbjörn, A., P. Hersteinsson, and M. Tannerfeldt. 2004. Arctic fox (Alopex lagopus). Canids: Foxes, Wolves, Jackals and Dogs - Status survey and conservation action plan. IUCN Gland:117-123. Compton, S.M., R.G. Maggi, and E.B. Breitschwerdt. 2012. Candidatus Mycoplasma haematoparvum and Mycoplasma haemocanis infections in dogs from the United States. Comp Immunol Microbiol Infect Dis. 35:557-562. Davidson, R., M. Simard, S.J. Kutz, C.M. Kapel, I.S. Hamnes, and L.J. Robertson. 2011. Arctic parasitology: why should we care? Trends in parasitology. 27:239-245. Duncan, A.W., R.G. Maggi, and E.B. Breitschwerdt. 2007. A combined approach for the enhanced detection and isolation of Bartonella species in dog blood samples: preenrichment liquid culture followed by PCR and subculture onto agar plates. J Microbiol Methods. 69:273-281. Egorov, I., A.S. Maramovich, S.M. Makeev, V.F. Cherniavskii, I.E. Trop, and L.D. Tugutov. 1996. [The epidemiological and epizootiological characteristics of leptospirosis in the Republic of Sakha (Yakutia)]. Meditsinskaia parazitologiia i parazitarnye bolezni:48-51. Elmore, S., L. Lalonde, G. Samelius, R. Alisauskas, A. Gajadhar, and E. Jenkins. 2013. Endoparasites in the feces of arctic foxes in a terrestrial ecosystem in Canada. International Journal for Parasitology: Parasites and Wildlife. 2:90-96. Fernandez-Aguilar, X., R. Mattsson, T. Meijer, E. Osterman-Lind, and D. Gavier-Widen. 2010. Pearsonema (syn Capillaria) plica associated cystitis in a Fennoscandian arctic fox (Vulpes lagopus: a case report. Acta veterinaria Scandinavica. 52:39. Gunnarsson, E., P. Hersteinsson, and S. Adalsteinsson. 1991. Prevalence and geographical distribution of the ear canker mite (Otodectes cynotis) among arctic foxes (Alopex lagopus) in Iceland. Journal of wildlife diseases. 27:105-109. Harriman, V.A., RT; Wobeser, GA. 2008. The case of the blood-covered egg: ectoparasite abundance in an arctic goose colony. Canadian Journal of Zoology. 86:959-965. Harriman, V.B., T.D. Galloway, R.T. Alisauskas, and G.A. Wobeser. 2011. Description of the larva of Ceratophyllus vagabundus vagabundus (Siphonaptera:Ceratophyllidae) from nests of Ross's and lesser snow geese in Nunavut, Canada. The Journal of parasitology. 97:218-220. Macdonald, E., K. Handeland, H. Blystad, M. Bergsaker, M. Fladberg, B. Gjerset, O. Nilsen, H. Os, S. Sandbu, E. Stokke, L. Vold, I. Orpetveit, H. Gaup Amot, and O. Tveiten. 2011. Public health implications of an outbreak of rabies in arctic foxes and reindeer in the Svalbard archipelago, Norway, September 2011. Euro surveillance : bulletin Europeen sur les maladies transmissibles = European communicable disease bulletin. 16. Maggi, R., A. Birkenheuer, B. Hegarty, J. Bradley, M. Levy, and E. Breitschwerdt. 2013a. Advantages and limitations of serological and molecular panels for the diagnosis of vector-borne infectious diseases in dogs. JAVMA. accepted for publication. Maggi, R.G., P.E. Mascarelli, N. Balakrishnan, C.M. Rohde, C.M. Kelly, L. Ramaiah, M.W. Leach, and E.B. Breitschwerdt. 2013b. 'Candidatus Mycoplasma haemomacaque' and Bartonella quintana bacteremia in cynomolgus monkeys. J Clin Microbiol. Maggi, R.G., P.E. Mascarelli, L.N. Havenga, V. Naidoo, and E.B. Breitschwerdt. 2013c. Coinfection with Anaplasma platys, Bartonella henselae and Candidatus Mycoplasma haematoparvum in a veterinarian. Parasit Vectors. 6:103. 6 Page 6 of 8
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Table 1: Vector-borne pathogens detected in blood from arctic foxes
Bartonella
Mycoplasma
Ehrlichia
Anaplasma
henselae*
haemocanis
canis
spp
Blood (n=20)
3
1
0
0
Blood clots (n=9)
0
0
1
1
Sample
*= Two B. henselae San Antonio 2, and one B. henselae Houston I. Note: Detection and identification of Bartonella, Mycoplasma, Ehrlichia , and Anaplasma species was performed by PCR amplification of the ITS region (Bartonella) and the 16SrRNA gene (using primers specific for Mycoplasma, Ehrlichia and Anaplasma) followed by sequence of positive amplicons (for species/strain identification) as described above.
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