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EcoHealth

, Volume 12, Issue 3, pp 528–539 | Cite as

A Review of Infectious Agents in Polar Bears (Ursus maritimus) and Their Long-Term Ecological Relevance

  • Anna C. Fagre
  • Kelly A. Patyk
  • Pauline Nol
  • Todd Atwood
  • Karsten Hueffer
  • Colleen Duncan
Review

Abstract

Disease was a listing criterion for the polar bear (Ursus maritimus) as threatened under the Endangered Species Act in 2008; it is therefore important to evaluate the current state of knowledge and identify any information gaps pertaining to diseases in polar bears. We conducted a systematic literature review focused on infectious agents and associated health impacts identified in polar bears. Overall, the majority of reports in free-ranging bears concerned serosurveys or fecal examinations with little to no information on associated health effects. In contrast, most reports documenting illness or pathology referenced captive animals and diseases caused by etiologic agents not representative of exposure opportunities in wild bears. As such, most of the available infectious disease literature has limited utility as a basis for development of future health assessment and management plans. Given that ecological change is a considerable risk facing polar bear populations, future work should focus on cumulative effects of multiple stressors that could impact polar bear population dynamics.

Keywords

bacteria disease fungi infection parasites polar bear Ursus maritimus virus vital rates 

Notes

Acknowledgments

We thank K. Oakley and A. Ramey for comments that improved an earlier version of this manuscript. Mention of trade names or organizations does not imply endorsement by the U.S. government.

References

  1. AMAP (2005) AMAP Assessment 2002: Heavy Metals in the Arctic (Arctic Monitoring and Assessment Programme (AMAP), Oslo, Norway). http://www.amap.no/documents/doc/amap-assessment-2002-heavy-metals-in-the-arctic/97. Accessed 17 Mar 2015
  2. Åsbakk K, Aars J, Derocher AE, Wiig Ø, Oksanen A, Born EW, et al. (2010) Serosurvey for Trichinella in polar bears (Ursus maritimus) from Svalbard and the Barents Sea. Veterinary Parasitology 172:256–263CrossRefPubMedGoogle Scholar
  3. Baltar P, Leiro J, Santamarina MT, Sanmartin ML, Porto MC, Ubeira FM (1991) Specific immunosuppression by Trichinella: fine specificity and effect on lymphocyte function in vivo. Parasitology 102:411–418CrossRefPubMedGoogle Scholar
  4. Banks M, Torraca LS, Greenwood AG, Taylor DC (1999) Aujeszky’s disease in captive bears. Veterinary Record 145:362–365CrossRefPubMedGoogle Scholar
  5. Bengis RG, Leighton FA, Fischer JR, Artois M, Mörner T, Tate CM (2004) The role of wildlife in emerging and re-emerging zoonoses. Revue scientifique et technique/Office international des épizooties 23:497–511Google Scholar
  6. Bohm J, van Knapen F (1989) Detection of serum antibodies to Trichinella spiralis by means of the enzyme-linked immunosorbent assay (ELISA) in the population of Avanerssuak/Thule, Greenland. In: Proceedings of the Seventh International Conference on Trichinellosis, Alicante, Spain, 1988, pp. 218–222Google Scholar
  7. Born EW, Henriksen SA (1990) Prevalence of Trichinella sp. in polar bears (Ursus maritimus) from northeastern Greenland. Polar Research 8:313–315CrossRefGoogle Scholar
  8. Brusilovskij TV (1967) Gruppovoe zabolevanie trikhinellezom na krainom severe. Meditsinskaya Parazitologiya i Parazitarnye Bolezni 7:161–165Google Scholar
  9. Burek KA, Gulland FMD, O’Hara TM (2008) Effects of climate change on Arctic marine mammal health. Ecological Applications 18:S126–S134CrossRefPubMedGoogle Scholar
  10. Cameron TWM (1960) Trichinosis in Canada. Wiadomosci Parazytologicnze 6:304Google Scholar
  11. Castrodale L (2011) Human and Animal Brucellosis in Alaska. State of Alaska Epidemiology Bulletin, Bulletin No. 31, Anchorage, AlaskaGoogle Scholar
  12. Cattet MR, Duignan PJ, House CA, Aubin DJ (2004) Antibodies to canine distemper and phocine distemper viruses in polar bears from the Canadian Arctic. Journal of Wildlife Diseases 40:338–342CrossRefPubMedGoogle Scholar
  13. Clubb R, Mason G (2003) Animal welfare: captivity effects on wide-ranging carnivores. Nature 425:473–474CrossRefPubMedGoogle Scholar
  14. Crain CM, Kroeker K, Halpern BS (2008) Interactive and cumulative effects of multiple human stressors in marine systems. Ecology Letters 11:1304–1315CrossRefPubMedGoogle Scholar
  15. Daszak P, Cunningham AA, Hyatt AD (2000) Emerging infectious diseases of wildlife-threats to biodiversity and human health. Science 287:443–449CrossRefPubMedGoogle Scholar
  16. Donovan TA, Schrenzel MD, Tucker T, Pessier AP, Bicknese B, Busch MD, et al. (2009) Meningoencephalitis in a polar bear caused by equine herpesvirus 9 (EHV-9). Veterinary Pathology 46:1138–1143CrossRefPubMedGoogle Scholar
  17. Durner GM, Douglas DC, Nielson RM, Amstrup SC, McDonald TL, Stirling I, et al. (2009)Predicting 21st-century polar bear habitat distribution from global climate models. Ecological Monographs 79:25–58CrossRefGoogle Scholar
  18. Dutton CJ, Quinnell M, Lindsay R, DeLay J, Barker IK (2009) Paraparesis in a polar bear (Ursus maritimus) associated with West Nile virus infection. Journal of Zoo and Wildlife Medicine 40:568–571CrossRefPubMedGoogle Scholar
  19. Ferguson SH, Taylor MK, Born EW, Rosing-Asvid A, Messier F (1999) Determinants of home range size for polar bears (Ursus maritimus). Ecology Letters 2:311–318CrossRefGoogle Scholar
  20. Finn JP (1969) Pyocephalus and gastritis in a polar bear (Thalarctus maritimus). Journal of the American Veteterinary Medical Association 155:1086–1089Google Scholar
  21. Follmann EH, Garner GW, Evermann JF, McKeirnan AJ (1996) Serological evidence of morbillivirus infection in polar bears (Ursus maritimus) from Alaska and Russia. Veterinary Record 138:615–618CrossRefPubMedGoogle Scholar
  22. Forbes LB (2000) The occurrence and ecology of Trichinella in marine mammals. Veterinary Parasitology 93:321–334CrossRefPubMedGoogle Scholar
  23. Gajadhar AA, Forbes LB (2010) A 10-year wildlife survey of 15 species of Canadian carnivores identifies new hosts or geographic locations for Trichinella genotypes T2, T4, T5, and T6. Veterinary Parasitology 168:78–83CrossRefPubMedGoogle Scholar
  24. Garner GW, Evermann JF, Saliki JT, Follmann EH, McKeirnan AJ (2000) Morbillivirus ecology in polar bears (Ursus maritimus). Polar Biology 23:474–478CrossRefGoogle Scholar
  25. Garner HM, Barr BC, Packham AE, Marsh AE, Burek-Huntington KA, Wilson RK, et al. (1997) Fatal hepatic sarcocystosis in two polar bears (Ursus maritimus). Journal of Parasitology 83:523–526CrossRefPubMedGoogle Scholar
  26. Glad T, Bernhardsen P, Nielsen KM, Brusetti L, Andersen M, Aars J, et al. (2010) Bacterial diversity in faeces from polar bear (Ursus maritimus) in Arctic Svalbard. BMC Microbiology 10:10PubMedCentralCrossRefPubMedGoogle Scholar
  27. Greenwood AD, Tsangaras K, Ho SY, Szentiks CA, Nikolin VM, Ma G, et al. (2012) A potentially fatal mix of herpes in zoos. Current Biology 22:1727–1731CrossRefPubMedGoogle Scholar
  28. Hanisch SL, Riley SJ, Nelson MP (2012) Promoting wildlife health or fighting wildlife disease: insights from history, philosophy, and science. Wildlife Society Bulletin 36:477–482CrossRefGoogle Scholar
  29. Harvell CD, Mitchell CE, Ward JR, Altizer S, Dobson AP, Ostfeld RS, et al. (2002) Climate warming and disease risks for terrestrial and marine biota. Science 296:2158–2162CrossRefPubMedGoogle Scholar
  30. Henriksen SA, Born EW, Eiersted L (1994) Infections with Trichinella in polar bears (Ursus maritimus) in Greenland: prevalence according to age and sex. In: Campbell WC, Pozio E, Bruschi F (Eds), Trichinellosis. Istituto Superiore di Sanità Press, Rome, Italy, 565-568Google Scholar
  31. Herreman J, Peacock E (2013) Polar bear use of a persistent food subsidy: insights from non-invasive genetic sampling in Alaska. Ursus 24:148–163CrossRefGoogle Scholar
  32. Hindersson R (1942). Trikiner i isbjörnött. Suom. Eläinlääkäril 48:25-30Google Scholar
  33. Hinzman LD, Bettez ND, Bolton WR, Chapin FS, Dyurgerov MB, Fastie CL, et al. (2005) Evidence and implications of recent climate change in northern Alaska and other arctic regions. Climatic Change 72:251–298CrossRefGoogle Scholar
  34. Hueffer K, Gende SM, O’Hara TM (2013) Assay dependence of Brucella antibody prevalence in a declining Alaskan harbor seal (Phoca vitulina) population. Acta Veterinaria Scandinavica 55:2PubMedCentralCrossRefPubMedGoogle Scholar
  35. Hueffer K, O’Hara TM, Follmann EH (2011) Adaptation of mammalian host-pathogen interactions in a changing arctic environment. Acta Veterinaria Scandinavica53:17PubMedCentralCrossRefPubMedGoogle Scholar
  36. Hunter CM, Caswell H, Runge MC, Regehr EV, Amstrup SC, Stirling I (2010) Climate change threatens polar bear populations: a stochastic demographic analysis. Ecology 91:2883–2897CrossRefPubMedGoogle Scholar
  37. Ishihara K, Hosokawa Y, Makita K, Noda J, Ueno H, Muramatsu Y, et al. (2012) Factors associated with antimicrobial-resistant Escherichia coli in zoo animals. Research in Veterinary Science 93:574–580CrossRefPubMedGoogle Scholar
  38. Jaime-Andrade G, Avila-Figueroa D, Lozano-Kasten F, Hernández-Gutiérrez R, Magallón-Gastélum E, Kasten-Monges M, et al. (1997) Acute Chagas’ cardiopathy in a polar bear (Ursus maritimus) in Guadalajara, Mexico. Revista da Sociedade Brasileira de Medicina Tropical 30:337–340CrossRefPubMedGoogle Scholar
  39. Jensen SK, Aars J, Lydersen C, Kovacs KM, Åsbakk K (2010) The prevalence of Toxoplasma gondii in polar bears and their marine mammal prey: evidence for a marine transmission pathway? Polar Biology 33:599–606CrossRefGoogle Scholar
  40. Jores J, Derocher AE, Staubach C, Aschfalk A (2008) Occurrence and prevalence of Clostridium perfringens in polar bears from Svalbard, Norway. Journal of Wildlife Diseases 44:155–158CrossRefPubMedGoogle Scholar
  41. Kirk C, Amstrup S, Swor R, Holcomb D, O’Hara T (2010) Morbillivirus and Toxoplasma exposure and association with hematological parameters for southern Beaufort Sea polar bears: potential response to infectious agents in a sentinel species. EcoHealth 7:321–331CrossRefPubMedGoogle Scholar
  42. Kjos-Hanssen B (1984) Trikinose i Arktis. In: Polarboken 1983/1984, pp 62–73Google Scholar
  43. Knott KK, Schenk P, Beyerlein S, Boyd D, Ylitalo GM, O’Hara TM (2011) Blood-based biomarkers of selenium and thyroid status indicate possible adverse biological effects of mercury and polychlorinated biphenyls in southern Beaufort Sea polar bears. Environmental Research 111:1124–1136PubMedCentralCrossRefPubMedGoogle Scholar
  44. Koryazhnov V (1946) Trikhinellez u belogo medvedia. Veterinariya 12:18–19Google Scholar
  45. Kozemjakin NG (1959) K voprosu o trikhinelloze belykh medvedej. Sb RabotLeningrad VetInst 16:76–79Google Scholar
  46. Kumar V, Pozio E, de Borchgrave J, Mortelmans J, De Meurichy W (1990) Characterization of a Trichinella isolate from polar bear. Annales de la Société belge de médecine tropicale 70:131–135PubMedGoogle Scholar
  47. Lacasse C, Gamble KC (2006) Tracheitis associated with Bordetella bronchiseptica in a polar bear (Ursus maritimus). Journal of Zoo and Wildlife Medicine 37:190–192CrossRefPubMedGoogle Scholar
  48. LaPointe DA, Atkinson CT, Samuel MD (2012) Ecology andconservation biology of avian malaria. Annals of the New York Academy of Sciences 1249:211–26.CrossRefPubMedGoogle Scholar
  49. Larsen T, Kjos-Hanssen B (1983) Trichinella sp. in polar bears from Svalbard, in relation to hide length and age. Polar Research 1:89–96CrossRefGoogle Scholar
  50. Ley RE, Hamady M, Lozupone C, Turnbaugh PJ, Ramey RR, Bircher JS, et al. (2008) Evolution of mammals and their gut microbes. Science 320:1647–1651PubMedCentralCrossRefPubMedGoogle Scholar
  51. Lie E, Larsen HJ, Larsen S, Johansen GM, Derocher AE, Lunn NJ, et al. (2004) Does high organochlorine (OC) exposure impair the resistance to infection in polar bears (Ursus maritimus)? Part I: Effect of OCs on the humoral immunity. Journal of Toxicology and Environmental Health 67:555–582CrossRefPubMedGoogle Scholar
  52. Loewen K, Prins B, Philibert H (1990) Rabies in a polar bear. Canadian Veterinary Journal 31:457Google Scholar
  53. Madsen H (1961) The distribution of Trichinella spiralis in sledge dogs and wild mammals in Greenland. Meddelelser om Grønland 159:1-125Google Scholar
  54. McColl KA, Butler R (1982) Trichinosis in a polar bear, Thalarctos maritimus, from the Royal Melbourne Zoo. Australian Veterinary Journal 59:61CrossRefPubMedGoogle Scholar
  55. McKinney MA, Atwood T, Dietz R, Sonne C, Iverson SJ, Peacock E (2014) Validation of adipose lipid content as a body condition index for polar bears. Ecology and Evolution 4:516-527PubMedCentralCrossRefPubMedGoogle Scholar
  56. Møller LN, Koch A, Petersen E, Hjuler T, Kapel CM, Andersen A, et al. (2010) Trichinella infection in a hunting community in East Greenland. Epidemiology and Infection 138:1252–1256CrossRefPubMedGoogle Scholar
  57. Morris PJ, Legendre AM, Bowersock TL, Brooks DE, Krahwinkel DJ, Shires GMH, et al. (1989) Diagnosis and treatment of systemic Blastomycosis in a polar bear (Ursus maritimus) with itraconazole. Journal of Zoo and Wildlife Medicine 20:336–345Google Scholar
  58. Newman MS, Cook RW, Appelhof WK, Kitchen H (1975) Dermatophilosis in two polar bears. Journal of the American Veterinary Medical Association 167:561–564PubMedGoogle Scholar
  59. O’Hara TM, Holcomb D, Elzer P, Estepp J, Perry Q, Hagius S, et al. (2010) Brucella species survey in polar bears (Ursus maritimus) of northern Alaska. Journal of Wildlife Diseases 46:687–694CrossRefPubMedGoogle Scholar
  60. Oksanen A, Åsbakk K, Prestrud KW, Aars J, Derocher AE, Tryland M, et al. (2009) Prevalence of antibodies against Toxoplasma gondii in polar bears (Ursus maritimus) from Svalbard and East Greenland. Journal of Parasitology 95:89–94CrossRefPubMedGoogle Scholar
  61. Ovsyukova NI (1965) Rasprostranenie trikhinelleza sredi zhivotnykh Chukotskogo poluostrova. Muteriuly k nuuchnym konferentsiiam vsesoiuznogo obshchestva gel’mintologov 2:178–182Google Scholar
  62. Oxley AP, Argo JA, McKay DB (2005) Helicobacter spp. from captive bottlenose dolphins (Tursiops spp.) and polar bears (Ursus maritimus). The Veterinary Journal 170:377–380CrossRefPubMedGoogle Scholar
  63. Ozeretskovskaya NN, Uspenski SM (1957) Gruppovoe zarazhenie trikhinellezom ot miasa belogomedvedia v sovetskoi arktike. Meditsinskaya Parazitologiya i Parazitarnye Belezni 2:152-157Google Scholar
  64. Pagano AM, Peacock E, McKinney MA (2014) Remote biopsy darting and marking of polar bears. Marine Mammal Science 30:169–183CrossRefGoogle Scholar
  65. Papini R, Casarosa L (1994) Observations on the infectivity of Baylisascaris transfuga eggs for mice. Veterinary Parasitology 51:283–288CrossRefPubMedGoogle Scholar
  66. Papini R, Cavicchio, P, Casarosa, L (1990) Baylisascaris transfuga found in captive polar bears (Thalarctos maritimus) in Italy. Annali dello Facoltà di medicina veterinaria. Universitià di Pisa 43:151-155Google Scholar
  67. Parmesan C (2006) Ecological and evolutionary responses to recent climate change. Annual Review of Ecology, Evolution, and Systematics 37:637–669CrossRefGoogle Scholar
  68. Patyk KA, Duncan C,Nol P, Sonne C, Laidre K, Obbard M, et al. (2015)Establishing a definition of polar bear (Ursus maritimus) health: a guide to research and management activities. Science of the Total Environment 514:371-378CrossRefPubMedGoogle Scholar
  69. Peacock E, Derocher AE, Thiemann GW, Stirling I (2011) Conservation and management of Canada’s polar bears (Ursus maritimus) in a changing Arctic. Canadian Journal of Zoology 89:371–385CrossRefGoogle Scholar
  70. Philippa JD, Leighton FA, Daoust PY, Nielsen O, Pagliarulo M, Schwantje H, et al. (2004) Antibodies to selected pathogens in free-ranging terrestrial carnivores and marine mammals in Canada. Veterinary Record 155:135–140CrossRefPubMedGoogle Scholar
  71. Pozio E, Nöckler K, Hoffman L, Voigt WP (2000) Autochthonous and imported Trichinella isolates in Germany. Veterinary Parasitology 87:157–161CrossRefPubMedGoogle Scholar
  72. Prowse TD, Furgal C, Wrona FJ, Reist JD (2009) Implications of climate change for northern Canada: freshwater, marine, and terrestrial ecosystems. Ambio 38:282–289CrossRefPubMedGoogle Scholar
  73. Rah H, Chomel BB, Follmann EH, Kasten RW, Hew CH, Farver TB, et al. (2005) Serosurvey of selected zoonotic agents in polar bears (Ursus maritimus). Veterinary Record 156:7–13CrossRefPubMedGoogle Scholar
  74. Rudolphi CA (1810) Entozoorum, sive vermium intestinalium historia naturalis. II. Pars 2, pp. 386Google Scholar
  75. Schliebe S, Rode KD, Gleason JS, Wilder J, Proffitt K, Evans TJ, et al. (2008) Effects of sea ice extent and food availability on spatial and temporal distribution of polar bears during the fall open-water period in the southern Beaufort Sea. Polar Biology 31:999–1010CrossRefGoogle Scholar
  76. Schrenzel MD, Tucker TA, Donovan TA, Busch MDM, Wise AG, Maes RK, et al. (2008) New hosts for equine herpesvirus 9. Emerging Infectious Diseases 14:1616–1619PubMedCentralCrossRefPubMedGoogle Scholar
  77. Schwab C, Gänzle M (2011) Comparative analysis of fecal microbiota and intestinal microbial metabolic activity in captive polar bears. Canadian Journal of Microbiology 57:177–185CrossRefPubMedGoogle Scholar
  78. Sedlák K, Bártová E (2006) Seroprevalences of antibodies to Neospora caninum and Toxoplasma gondii in zoo animals. Veterinary Parasitology 136:223–231CrossRefPubMedGoogle Scholar
  79. Siam MA, Salem GH, Ghoneim NH, Michael SA, El-Refay MAH (1994) Public health importance of enteric parasitosis in captive Carnivora. Assiut Veterinary Medical Journal 32:131–140Google Scholar
  80. Sleeman JM, Ramsay EC, Faulkner CT, Patton S, Mason G (1994) Trichinosis in a polar bear (Ursus maritimus). In: Proceedings of the American Association of Zoo Veterinarians, pp. 352–353.Google Scholar
  81. Smith CF, Cordes DO (1972) Dermatitis caused by Dermatophilus congolensis infection in polar bears (Thalactos maritimus). British Veterinary Journal 128:366–371PubMedGoogle Scholar
  82. Smith HJ (1978) Status of trichinosis in bears in the Atlantic provinces of Canada 1971–1976. Canadian Journal of Comparative Medicine 42:244–245PubMedCentralPubMedGoogle Scholar
  83. Stirling I, Derocher AE (1993) Possible impacts of climatic warming on polar bears. Arctic 46: 240–245CrossRefGoogle Scholar
  84. Sonne C, Letcher RJ, Bechshøft TØ, Rigét FF, Muir DCG, Leifsson PS, et al. (2012) Two decades of biomonitoring polar bear health in Greenland: a review. Acta Veterinaria Scandinavica 54:S15PubMedCentralCrossRefGoogle Scholar
  85. Stephen C (2014) Toward a modernized definition of wildlife health. Journal of Wildlife Diseases 50: 427–430CrossRefPubMedGoogle Scholar
  86. Takahashi Y, Mingyuan L, Waikagul J (2000) Epidemiology of trichinellosis in Asia and the Pacific Rim. Veterinary Parasitology 93:227–239CrossRefPubMedGoogle Scholar
  87. Taylor M, Elkin B, Maier N, Bradley M (1991) Observation of a polar bear with rabies. Journal of Wildlife Diseases 27:337–339CrossRefPubMedGoogle Scholar
  88. Testini G, Papini R, Lia RP, Parisi A, Dantas-Torres F, Traversa D, et al. (2011) New insights into the morphology, molecular characterization and identification of Baylisascaris transfuga (Ascaridida, Ascarididae). Veterinary Parasitology 175:97–102CrossRefPubMedGoogle Scholar
  89. Thorshaug K, Rosted RA (1956) Researches into the prevalence of trichinosis in animals in Arctic and Antarctic waters. Nordisk Veterinaermedicin 8:115–129Google Scholar
  90. Tryland M, Derocher AE, Wiig Ø, Godfroid J (2001) Brucella sp. antibodies in polar bears from Svalbard and the Barents Sea. Journal of Wildlife Diseases 37:523–531CrossRefPubMedGoogle Scholar
  91. Tryland M, Neuvonen E, Huovilainen A, Tapiovaara H, Osterhaus A, Wiig Ø, et al. (2005) Serologic survey for selected virus infections in polar bears at Svalbard. Journal of Wildlife Diseases 41:310–316CrossRefPubMedGoogle Scholar
  92. U.S. Fish and Wildlife Service (2008) Endangered and threatened wildlife and plants; determination of threatened status for the polar bear (Ursus maritimus) throughout its range; final rule. Federal Register 73:28, 212–228, 303Google Scholar
  93. Une Y, Mori T (2007) Tuberculosis as a zoonosis from a veterinary perspective. Comparative Immunology, Microbiology and Infectious Diseases 30:415–425CrossRefPubMedGoogle Scholar
  94. Vercruysse J, Kumar V, Ceulemans F, Mortelmans J (1977) Chemotherapy of helminthiasis among wild mammals, 2. Baylisascaris transfuga (Rudolphi, 1819) Sprent. 1968 infection of polar bear. Acta Zoologica et Pathologica Antverpiensia No. 64, 1976:115–119Google Scholar
  95. Vongraven D, Aars J, Amstrup S, Atkinson SN, Belikov S, Born EW, et al. (2012) A circumpolar monitoring framework for polar bears. Ursus 23:1–66CrossRefGoogle Scholar
  96. Weber DS, Van Coeverden De Groot PJ, Peacock E, Schrenzel MD, Perez DA, Thomas S, et al. (2013) Low MHC variation in the polar bear: implications in the face of Arctic warming? Animal Conservation 16:671–683CrossRefGoogle Scholar
  97. Weidman FD (1915) Distribution of Uncinaria among the lower animals. Journal of Comparative Pathology and Therapeutics 28:323–326CrossRefGoogle Scholar
  98. Weyermann D, Worley DE, Seesee FM (1993) Survey of Trichinella nativa in Alaskan polar bears, Ursus maritimus. Helminthologia 30:143–145Google Scholar
  99. Wobeser GA (2006) Essentials of Disease in Wild Animals, 1st edition. Blackwell Publishing, Ames, IowaGoogle Scholar
  100. Xie Y, Zhang Z, Wang C, Lan J, Li Y, Chen Z, et al. (2011) Complete mitochondrial genomes of Baylisascaris schroederi, Baylisascaris ailuri and Baylisascaris transfuga from giant panda, red panda and polar bear. Gene 482:59–67CrossRefPubMedGoogle Scholar
  101. Yépez-Mulia L, Arriaga C, Peña MA, Gual F, Ortega-Pierres G (1996) Serologic survey of trichinellosis in wild mammals kept in a Mexico City Zoo. Veterinary Parasitology 67:237–246CrossRefPubMedGoogle Scholar

Copyright information

© International Association for Ecology and Health 2015

Authors and Affiliations

  • Anna C. Fagre
    • 1
  • Kelly A. Patyk
    • 2
  • Pauline Nol
    • 3
  • Todd Atwood
    • 4
  • Karsten Hueffer
    • 5
  • Colleen Duncan
    • 1
  1. 1.Veterinary Diagnostic Laboratory, College of Veterinary Medicine and Biomedical SciencesColorado State UniversityFort CollinsUSA
  2. 2.Center for Epidemiology and Animal Health, Science Technology and Analysis Services (STAS), Veterinary Services (VS), Animal and Plant Health Inspection Service (APHIS), United States Department of Agriculture (USDA)Fort CollinsUSA
  3. 3.Wildlife-Livestock Disease Investigations Team, STAS, VS, APHIS, USDAFort CollinsUSA
  4. 4.U.S. Geological Survey, Alaska Science CenterAnchorageUSA
  5. 5.Department of Veterinary Medicine, College of Natural Science and MathematicsUniversity of Alaska FairbanksFairbanksUSA

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