Journal
AMERICAN JOURNAL OF TROPICAL MEDICINE AND HYGIENE
Volume 83, Issue 3, Pages 624-632Publisher
AMER SOC TROP MED & HYGIENE
DOI: 10.4269/ajtmh.2010.09-0775
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Funding
- Marie Curie early training site (EST) program
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Plague is a vector-borne, highly virulent zoonotic disease caused by the bacterium Yersima pesos It persists in nature through transmission between its hosts (wild rodents) and vectors (fleas). During epizootics, the disease expands and spills over to other host species such as humans living in or close to affected areas Here, we investigate the effect of large-scale climate variability on the dynamics of human plague in the western United States using a 56-year time series of plague reports (1950-2005). We found that El Nino Southern Oscillation and Pacific Decadal Oscillation in combination affect the dynamics of human plague over the western United States. The underlying mechanism could involve changes in precipitation and temperatures that impact both hosts and vectors It is suggested that snow also may play a key role, possibly through its effects on summer soil moisture, which is known to be instrumental for flea survival and development and sustained growth of vegetation for rodents
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