{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,5]],"date-time":"2026-10-05T23:01:25Z","timestamp":1791241285991,"version":"4.1.0"},"reference-count":26,"publisher":"American Society of Tropical Medicine and Hygiene","issue":"2","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2012,2,1]]},"abstract":"<jats:p>We estimated Rift Valley fever (RVF) incidence as a function of geological, geographical, and climatological factors during the 2006\u20132007 RVF epidemic in Kenya. Location information was obtained for 214 of 340 (63%) confirmed and probable RVF cases that occurred during an outbreak from November 1, 2006 to February 28, 2007. Locations with subtypes of solonetz, calcisols, solonchaks, and planosols soil types were highly associated with RVF occurrence during the outbreak period. Increased rainfall and higher greenness measures before the outbreak were associated with increased risk. RVF was more likely to occur on plains, in densely bushed areas, at lower elevations, and in the Somalia acacia ecological zone. Cases occurred in three spatial temporal clusters that differed by the date of associated rainfall, soil type, and land usage.<\/jats:p>","DOI":"10.4269\/ajtmh.2012.11-0450","type":"journal-article","created":{"date-parts":[[2012,2,6]],"date-time":"2012-02-06T21:50:37Z","timestamp":1328565037000},"page":"373-380","source":"Crossref","is-referenced-by-count":61,"title":["Relationship of Climate, Geography, and Geology to the Incidence of Rift Valley Fever in Kenya during the 2006\u20132007 Outbreak"],"prefix":"10.4269","volume":"86","author":[{"given":"Allen","family":"Hightower","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Carl","family":"Kinkade","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Patrick M.","family":"Nguku","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Amwayi","family":"Anyangu","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"David","family":"Mutonga","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jared","family":"Omolo","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"M. Kariuki","family":"Njenga","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Daniel R.","family":"Feikin","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"David","family":"Schnabel","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Maurice","family":"Ombok","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Robert F.","family":"Breiman","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"2795","reference":[{"key":"R1","series-title":"CRC Handbook Series in Zoonoses, Section B: Viral Zoonoses","first-page":"125","article-title":"Rift Valley fever","author":"Peters","year":"1994"},{"key":"R2","series-title":"Bull World Health Organ","first-page":"941","article-title":"Rainfall and epizootic Rift Valley fever","volume":"63","author":"Davies","year":"1985"},{"key":"R3","series-title":"Emerg Infect Dis","first-page":"138","article-title":"An outbreak of Rift Valley Fever in northeastern Kenya, 1997\u201398","volume":"8","author":"Woods","year":"2002"},{"issue":"(Suppl 2):","key":"R4","series-title":"Am J Trop Med Hyg","first-page":"5","article-title":"An investigation of a major outbreak of Rift Valley Fever in Kenya: 2006\u20132007","volume":"83","author":"Nguku","year":"2010"},{"key":"R5","series-title":"J Hyg (Lond)","first-page":"197","article-title":"Rift Valley fever virus (family Bunyaviridae, genus Phlebovirus): isolations from Diptera collected during an interepizootic period in Kenya","volume":"95","author":"Linthicum","year":"1985"},{"key":"R6","series-title":"J Med Entomol","first-page":"293","article-title":"Isolation of Rift Valley fever virus from mosquitoes collected during an outbreak in domestic animals in Kenya","volume":"28","author":"Logan","year":"1991"},{"key":"R7","series-title":"Am J Trop Med Hyg","first-page":"1405","article-title":"Experimental transmission and field isolation studies implicating Culex pipiens as a vector of Rift Valley fever virus in Egypt","volume":"29","author":"Meegan","year":"1980"},{"key":"R8","series-title":"Am J Trop Med Hyg","first-page":"28","article-title":"Rift Valley Fever virus epidemic in Kenya, 2006\/2007: the entomologic investigations","volume":"83","author":"Sang","year":"2010"},{"key":"R9","series-title":"Am J Trop Med Hyg","first-page":"14","article-title":"Risk factors for severe Rift Valley Fever infection in Kenya, 2007","volume":"83","author":"Anyangu","year":"2010"},{"key":"R10","series-title":"Am J Trop Med Hyg","first-page":"58","article-title":"Rift Valley Fever outbreak in livestock in Kenya, 2006\u20132007","volume":"83","author":"Munyua","year":"2010"},{"key":"R11","series-title":"Science","first-page":"397","article-title":"Climate and satellite indicators to forecast Rift Valley fever epidemics in Kenya","volume":"285","author":"Linthicum","year":"1999"},{"key":"R12","series-title":"Proc Natl Acad Sci USA","first-page":"955","article-title":"Prediction of a Rift Valley fever outbreak","volume":"1006","author":"Anyamba","year":"2009"},{"key":"R13","series-title":"Vector Borne Zoonotic Dis","first-page":"203","article-title":"Risk-mapping of Rift Valley fever in Senegal","volume":"7","author":"Clements","year":"2007"},{"key":"R14","series-title":"Vector Borne Zoonotic Dis","first-page":"33","article-title":"Mapping Rift Valley fever vectors and prevalence using rainfaill variations.","volume":"4","author":"Bicout","year":"2004"},{"key":"R15","article-title":"International Livestock Research Institute GIS Database.","author":"Kruska","year":"2007"},{"key":"R16","series-title":"FAO\/UNESCO Soil Map of the World, Revised Legend with Corrections and Updates. 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