1921
Volume 71, Issue 3
  • ISSN: 0002-9637
  • E-ISSN: 1476-1645

Abstract

Using a dynamic hydrology model, we simulated land surface wetness conditions at 42 sites in 28 counties in southcentral Florida from 1990 to 1998 and compared these simulations with the incidence of human cases of St. Louis encephalitis (SLE) within these counties. Within counties, drought four months prior and wetting one-half month prior were significantly associated with human cases of SLE. Simulated land surface wetness conditions resolved transmission loci in both space and time, and May drought was significantly associated with the subsequent occurrence of human SLE cases. These findings are consistent with previous results associating simulated land surface wetness conditions with the transmission of SLE virus as measured in sentinel chickens, and support our working hypothesis that springtime drought facilitates SLE virus amplification in mosquito and wild bird populations.

Loading

Article metrics loading...

/content/journals/10.4269/ajtmh.2004.71.251
2004-09-01
2017-11-22
Loading full text...

Full text loading...

/deliver/fulltext/14761645/71/3/0700251.html?itemId=/content/journals/10.4269/ajtmh.2004.71.251&mimeType=html&fmt=ahah

References

  1. Day JF, Curtis GA, 1999. Blood feeding and oviposition by Culex nigripalpus (Diptera: Culicidae) before, during, and after a widespread St. Louis encephalitis virus epidemic in Florida. J Med Entomol 36 : 176–181.
  2. Shaman J, Day J, Stieglitz M, 2002. Drought-induced amplification of St. Louis encephilitis virus, Florida. Emer Infect Dis 8 : 575–580.
  3. Stieglitz M, Rind D, Famiglietti J, Rosenzweig C, 1997. An efficient approach to modeling the topographic control of surface hydrology for regional and global climate modeling. J Climate 10 : 118–137.
  4. Day JF, Stark LM, 2000. Frequency of Saint Louis encephalitis virus in humans from Florida, USA: 1990–1999. J Med Entomol 37 : 626–633.
  5. Chamberlain RW, Sudia WD, Coleman PH, Beadle LD, 1964. Vector studies in the St. Louis encephalitis epidemic, Tampa Bay area, Florida, 1962. Am J Trop Med Hyg 13 : 456–461.
  6. Dow RP, Coleman PH, Meadows KE, Work TH, 1964. Isolation of St. Louis encephalitis viruses from mosquitoes in the Tampa Bay area of Florida during the 1962 epidemic. Am J Trop Med Hyg 13 : 462–474.
  7. Shroyer DA, 1991. The 1990 Florida epidemic of St. Louis encephalitis: virus infection rates in Culex nigripalpus. J Fla Mosq Control Assoc 62 : 69–71.
  8. Day JF, Curtis GA, 1993. Annual emergence patterns of Culex nigripalpus females before, during and after a widespread St. Louis encephalitis epidemic in south Florida. J Am Mosq Cont Assoc 9 : 249–253.
  9. Shaman J, Day J, Stieglitz M, 2003. St. Louis encephalitis virus in wild birds during the 1990 south Florida epidemic: the importance of drought, wetting conditions, and the emergence of Culex nigripalpus to arboviral amplification and transmission. J Med Entomol 40 : 547–554.
  10. Beven KJ, Kirkby MJ, 1979. A physically based, variable contributing area model of basin hydrology. Hydrol Sci 24 : 43–69.
  11. Ducharne A, Koster RD, Suarez MJ, Stieglitz M, Kumar P, 2000. A catchment-based approach to modeling land surface processes. Part II: Parameter estimation and model demonstration. J Geophys Res 105 : 24823–24838.
  12. Shaman J, Stieglitz M, Engel V, Koster R, Stark C, 2002. Representation of storm flow and a more responsive water table in a TOPMODEL-based hydrology model. Water Resources Res 38 : Art No. 1156.
  13. Shaman J, Stieglitz M, Zebiak S, Cane M, 2003. A local forecast of land surface wetness conditions derived from seasonal climate predictions. J Hydrometeorol 4 : 611–626.
  14. DeGaetano A, Eggleston K, Knapp W, 1995. Daily solar radiation estimates for the northeastern United States using the northeast regional climate center and National Renewable Energy Laboratory models. Solar Energy 55 : 185–194.
  15. Dow RP, Gerrish GM, 1970. Day-to-day change in relative humidity and the activity of Culex nigripalpus (Diptera: Culicidae). Ann Entomol Soc Am 63 : 995–999.
  16. Day JF, Curtis GA, 1994. When it rains they soar–and that makes Culex nigripalpus a dangerous mosquito. Am Entomologist 40 : 162–167.
http://instance.metastore.ingenta.com/content/journals/10.4269/ajtmh.2004.71.251
Loading
/content/journals/10.4269/ajtmh.2004.71.251
Loading

Data & Media loading...

  • Received : 03 Jul 2003
  • Accepted : 01 Jan 2004

Most Cited This Month

This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error