Drought-Induced Amplification of Saint Louis encephalitis virus, Florida
We used a dynamic hydrology model to simulate water table depth (WTD) and quantify the relationship between Saint Louis encephalitis virus (SLEV) transmission and hydrologic conditions in Indian River County, Florida, from 1986 through 1991, a period with an SLEV epidemic. Virus transmission followe...
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| Format: | Article |
| Language: | English |
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Centers for Disease Control and Prevention
2002-06-01
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| Series: | Emerging Infectious Diseases |
| Subjects: | |
| Online Access: | https://wwwnc.cdc.gov/eid/article/8/6/01-0417_article |
| _version_ | 1811231745731723264 |
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| author | Jeffrey Shaman Jonathan F. Day Marc Stieglitz |
| author_facet | Jeffrey Shaman Jonathan F. Day Marc Stieglitz |
| author_sort | Jeffrey Shaman |
| collection | DOAJ |
| description | We used a dynamic hydrology model to simulate water table depth (WTD) and quantify the relationship between Saint Louis encephalitis virus (SLEV) transmission and hydrologic conditions in Indian River County, Florida, from 1986 through 1991, a period with an SLEV epidemic. Virus transmission followed periods of modeled drought (specifically low WTDs 12 to 17 weeks before virus transmission, followed by a rising of the water table 1 to 2 weeks before virus transmission). Further evidence from collections of Culex nigripalpus (the major mosquito vector of SLEV in Florida) suggests that during extended spring droughts vector mosquitoes and nestling, juvenile, and adult wild birds congregate in selected refuges, facilitating epizootic amplification of SLEV. When the drought ends and habitat availability increases, the SLEV-infected Cx. nigripalpus and wild birds disperse, initiating an SLEV transmission cycle. These findings demonstrate a mechanism by which drought facilitates the amplification of SLEV and its subsequent transmission to humans. |
| first_indexed | 2024-04-12T10:50:15Z |
| format | Article |
| id | doaj.art-bf0c0da143e84326b24cb5a829f9e5b5 |
| institution | Directory Open Access Journal |
| issn | 1080-6040 1080-6059 |
| language | English |
| last_indexed | 2024-04-12T10:50:15Z |
| publishDate | 2002-06-01 |
| publisher | Centers for Disease Control and Prevention |
| record_format | Article |
| series | Emerging Infectious Diseases |
| spelling | doaj.art-bf0c0da143e84326b24cb5a829f9e5b52022-12-22T03:36:15ZengCenters for Disease Control and PreventionEmerging Infectious Diseases1080-60401080-60592002-06-018657558010.3201/eid0806.010417Drought-Induced Amplification of Saint Louis encephalitis virus, FloridaJeffrey ShamanJonathan F. DayMarc StieglitzWe used a dynamic hydrology model to simulate water table depth (WTD) and quantify the relationship between Saint Louis encephalitis virus (SLEV) transmission and hydrologic conditions in Indian River County, Florida, from 1986 through 1991, a period with an SLEV epidemic. Virus transmission followed periods of modeled drought (specifically low WTDs 12 to 17 weeks before virus transmission, followed by a rising of the water table 1 to 2 weeks before virus transmission). Further evidence from collections of Culex nigripalpus (the major mosquito vector of SLEV in Florida) suggests that during extended spring droughts vector mosquitoes and nestling, juvenile, and adult wild birds congregate in selected refuges, facilitating epizootic amplification of SLEV. When the drought ends and habitat availability increases, the SLEV-infected Cx. nigripalpus and wild birds disperse, initiating an SLEV transmission cycle. These findings demonstrate a mechanism by which drought facilitates the amplification of SLEV and its subsequent transmission to humans.https://wwwnc.cdc.gov/eid/article/8/6/01-0417_articleamplificationCulex nigripalpusdroughtdynamic modelingentomologyFlorida |
| spellingShingle | Jeffrey Shaman Jonathan F. Day Marc Stieglitz Drought-Induced Amplification of Saint Louis encephalitis virus, Florida Emerging Infectious Diseases amplification Culex nigripalpus drought dynamic modeling entomology Florida |
| title | Drought-Induced Amplification of Saint Louis encephalitis virus, Florida |
| title_full | Drought-Induced Amplification of Saint Louis encephalitis virus, Florida |
| title_fullStr | Drought-Induced Amplification of Saint Louis encephalitis virus, Florida |
| title_full_unstemmed | Drought-Induced Amplification of Saint Louis encephalitis virus, Florida |
| title_short | Drought-Induced Amplification of Saint Louis encephalitis virus, Florida |
| title_sort | drought induced amplification of saint louis encephalitis virus florida |
| topic | amplification Culex nigripalpus drought dynamic modeling entomology Florida |
| url | https://wwwnc.cdc.gov/eid/article/8/6/01-0417_article |
| work_keys_str_mv | AT jeffreyshaman droughtinducedamplificationofsaintlouisencephalitisvirusflorida AT jonathanfday droughtinducedamplificationofsaintlouisencephalitisvirusflorida AT marcstieglitz droughtinducedamplificationofsaintlouisencephalitisvirusflorida |