, Volume 6, Issue 4, pp 540–545

Spatial Variation in an Avian Host Community: Implications for Disease Dynamics

  • Sarah L. States
  • Wesley M. Hochachka
  • André A. Dhondt
Short Communication


Because many pathogens can infect multiple host species within a community, disease dynamics in a focal host species can be affected by the composition of the host community. We examine the extent to which spatial variation in species’ abundances in an avian host community may contribute to geographically varying prevalence of a recently emerged wildlife pathogen. Mycoplasma gallisepticum is a pathogen novel to songbirds that has caused substantial mortality in house finches (Carpodacus mexicanus) in eastern North America. Though the house finch is the primary host species for M. gallisepticum, the American goldfinch (Spinus tristis) and northern cardinal (Cardinalis cardinalis) are alternate hosts, and laboratory experiments have demonstrated M. gallisepticum transmission between house finches and goldfinches. Still unknown is the real world impact on disease dynamics of variation in abundances of the three hosts. We analyzed data from winter-long bird and disease surveys in the northeastern United States. We found that higher disease prevalence in house finches was associated with higher numbers of northern cardinals and American goldfinches, although only the effect of cardinal abundance was statistically significant. Nevertheless, our results indicate that spatial variation in bird communities has the potential to cause geographic variation in disease prevalence in house finches.


Carpodacus mexicanus Spinus tristis Cardinalis cardinalis spatial autocorrelation Mycoplasma gallisepticum host–parasite dynamics 


  1. Craft ME, Hawthorne PL, Packer C, Dobson AP (2008) Dynamics of a multihost pathogen in a carnivore community. Journal of Animal Ecology 77:1257–1264CrossRefGoogle Scholar
  2. Dhondt AA, Altizer S, Cooch EG, Davis AK, Dobson A, Driscoll MJ, et al. (2005) Dynamics of a novel pathogen in an avian host: Mycoplasmal conjunctivitis in house finches. Acta Tropica 94:77–93CrossRefGoogle Scholar
  3. Dhondt AA, Dhondt KV, Hawley DM, Jennelle CS (2007) Experimental evidence for transmission of Mycoplasma gallisepticum in house finches by fomites. Avian Pathology 36:205–208CrossRefGoogle Scholar
  4. Dhondt AA, Dhondt KV, McCleery BV (2008) Comparative infectiousness of three passerine bird species after experimental inoculation with Mycoplasma gallisepticum. Avian Pathology 37:635–640CrossRefGoogle Scholar
  5. Dhondt AA, Tessaglia DL, Slothower RL (1998) Epidemic mycoplasmal conjunctivitis in house finches from eastern North America. Journal of Wildlife Diseases 34:265–280Google Scholar
  6. Dhondt KV, Dhondt AA, Ley DH (2007) Effects of route of inoculation on Mycoplasma gallisepticum infection in captive house finches. Avian Pathology 36:475–479CrossRefGoogle Scholar
  7. Dobson A (2004) Population dynamics of pathogens with multiple host species. American Naturalist 164(Suppl 5):S64–S78Google Scholar
  8. Fischer JR, Stallknecht DE, Luttrell P, Dhondt AA, Converse KA (1997) Mycoplasmal conjunctivitis in wild songbirds: the spread of a new contagious disease in a mobile host population. Emerging Infectious Diseases 3:69–72CrossRefGoogle Scholar
  9. Hartup BK, Dhondt AA, Sydenstricker KV, Hochachka WM, Kollias GV (2001) Host range and dynamics of mycoplasmal conjunctivitis among birds in North America. Journal of Wildlife Diseases 37:72–81Google Scholar
  10. Hochachka WM, Dhondt AA (2000) Density-dependent decline of host abundance resulting from a new infectious disease. Proceedings of the National Academy of Sciences USA 97:5303–5306CrossRefGoogle Scholar
  11. Hochachka WM, Dhondt AA (2006) House finch population- and group-level responses to a bacterial disease. In: Current Topics in Avian Disease Research: Understanding Endemic and Invasive Diseases, Barraclough RK (editor), American Ornithologists’ Union, Washington, DC, pp 30–43Google Scholar
  12. Keesing F, Holt RD, Ostfeld RS (2006) Effects of species diversity on disease risk. Ecology Letters 9:485–498CrossRefGoogle Scholar
  13. Lepage D, Francis CM (2002) Do feeder counts reliably indicate bird population changes? 21 years of winter bird counts in Ontario, Canada. Condor 104:2:255–270CrossRefGoogle Scholar
  14. LoGiudice K, Ostfeld RS, Schmidt KA, Keesing F (2003) The ecology of infectious disease: effects of host diversity and community composition on Lyme disease risk. Proceedings of the National Academy of Sciences USA 100:567–571CrossRefGoogle Scholar
  15. Ostfeld RS, Keesing F (2000) Biodiversity and disease risk: the case of Lyme disease. Conservation Biology 14:722–728CrossRefGoogle Scholar
  16. Peixoto ID, Abramson G (2006) The effect of biodiversity on the hantavirus epizootic. Ecology 87:873–879CrossRefGoogle Scholar
  17. Rudolf VH, Antonovics J (2005) Species coexistence and pathogens with frequency-dependent transmission. American Naturalist 166:112–118CrossRefGoogle Scholar
  18. Wells JV, Rosenberg KV, Dunn EH, Tessaglia-Hymes DL, Dhondt AA (1998) Feeder counts as indicators of spatial and temporal variation in winter abundance of resident birds. Journal of Field Ornithology 69:577–586Google Scholar

Copyright information

© International Association for Ecology and Health 2010

Authors and Affiliations

  • Sarah L. States
    • 1
  • Wesley M. Hochachka
    • 2
  • André A. Dhondt
    • 2
  1. 1.Department of Ecology and Evolutionary BiologyCornell UniversityIthaca USA
  2. 2.Laboratory of OrnithologyCornell UniversityIthaca USA

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