Thursday, November 10, 2011

Climate Change Promotes Emergence of Serious Disease

Instead of the aesthetically pleasing critter of the week, I would like to address an often over looked part of ecology and conservation efforts. Filaroid Nematodes are parasites that are transmitted via Mosquitoes. The abstract of the article tells us some more about these parasites:
Filarioid parasites represent major health hazards with important medical, veterinary, and economic implications, and considerable potential to affect the everyday lives of tens of millions of people globally (World Health Organization, 2007). Scenarios for climate change vary latitudinally and regionally and involve direct and indirect linkages for increasing temperature and the dissemination, amplification, and invasiveness of vector-borne parasites. High latitude regions are especially influenced by global climate change and thus may be prone to altered associations and dynamics for complex host-pathogen assemblages and emergence of disease with cascading effects on ecosystem structure. 
Coincidental with decades of warming, and anomalies of high temperature and humidity in the sub-Arctic region of Fennoscandia, the mosquito-borne filarioid nematode Setaria tundra is now associated with emerging epidemic disease resulting in substantial morbidity and mortality for reindeer and moose. We describe a hostparasite system that involves reindeer, arthropods, and nematodes, which may contribute as a factor to ongoing declines documented for this ungulate species across northern ecosystems. We demonstrate that mean summer temperatures exceeding 14 C drive the emergence of disease due to S. tundra. An association between climate and emergence of filarioid parasites is a challenge to ecosystem services with direct effects on public health, sustainability of free-ranging and domestic ungulates, and ultimately food security for subsistence cultures at high latitudes.
 Full article can be found here

Sources: Laaksonen, S., Pusenius, J., Kumpula, J., Venalainen, A., Kortet, R., Oksanen, A., Hoberg, E.P. 2010. Climate change promotes the emergence of serious disease outbreaks for Filarioid nematodes. EcoHealth. 7:7-13.

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