{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,5]],"date-time":"2026-10-05T23:00:37Z","timestamp":1791241237907,"version":"4.1.0"},"reference-count":15,"publisher":"Cambridge University Press (CUP)","issue":"2","license":[{"start":{"date-parts":[[2009,5,15]],"date-time":"2009-05-15T00:00:00Z","timestamp":1242345600000},"content-version":"unspecified","delay-in-days":12280,"URL":"https:\/\/www.cambridge.org\/core\/terms"}],"content-domain":{"domain":["journals.cambridge.org"],"crossmark-restriction":true},"short-container-title":["J. Hyg."],"published-print":{"date-parts":[[1975,10]]},"abstract":"<jats:title>SUMMARY<\/jats:title><jats:p>The epizootic range of Rift Valley fever in Kenya is defined from the results of virus isolations during epizootics, and from an extensive serological survey of cattle which were exposed during an epizootic. A study of the sera from a wide range of wild bovidae sampled immediately after the epizootic, showed that they did not act as reservoir or amplifying hosts for RVF.<\/jats:p><jats:p>Virus isolation attempts from a variety of rodents proved negative. Rift Valley fever did not persist between epizootics by producing symptomless abortions in cattle in areas within its epizootic range. A sentinel herd sampled annually after an epizootic in 1968 revealed not one single seroconversion from 1969 to 1974. Certain forest and forest edge situations were postulated as enzootic for Rift Valley fever, and a small percentage of seroconversions were detected in cattle in these areas, born four years after the last epizootic. This has been the only evidence for the persistence of the virus in Kenya since 1968, and may be a part of the interepizootic maintenance cycle for Rift Valley fever in Kenya, which otherwise remains unknown.<\/jats:p>","DOI":"10.1017\/s0022172400047252","type":"journal-article","created":{"date-parts":[[2009,5,15]],"date-time":"2009-05-15T05:57:03Z","timestamp":1242367023000},"page":"219-230","update-policy":"https:\/\/doi.org\/10.1017\/policypage","source":"Crossref","is-referenced-by-count":87,"title":["Observations on the epidemiology of Rift Valley fever in Kenya"],"prefix":"10.1017","volume":"75","author":[{"given":"F. G.","family":"Davies","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"56","published-online":{"date-parts":[[2009,5,15]]},"reference":[{"key":"S0022172400047252_ref006","doi-asserted-by":"publisher","DOI":"10.1016\/0035-9203(72)90253-2"},{"key":"S0022172400047252_ref004","doi-asserted-by":"publisher","DOI":"10.1016\/S0140-6736(01)24634-0"},{"key":"S0022172400047252_ref007","doi-asserted-by":"publisher","DOI":"10.1017\/S0022172400023470"},{"key":"S0022172400047252_ref001","volume-title":"Proceedings of Inter-African Advisory Committee on Epizootic Diseases (LACED)","author":"Alexander","year":"1957"},{"key":"S0022172400047252_ref008","doi-asserted-by":"publisher","DOI":"10.1136\/vr.95.3.63"},{"key":"S0022172400047252_ref009","doi-asserted-by":"publisher","DOI":"10.1017\/S0022172400047264"},{"key":"S0022172400047252_ref003","doi-asserted-by":"publisher","DOI":"10.1038\/195583a0"},{"key":"S0022172400047252_ref011","doi-asserted-by":"publisher","DOI":"10.1016\/S0035-9203(32)90042-X"},{"key":"S0022172400047252_ref013","unstructured":"Kaschula V. R. (1953). The propagation and modification of strains of Rift Valley fever viruses in embryonated eggs and their use as immunising agents for domestic ruminants. Thesis. University of Pretoria."},{"key":"S0022172400047252_ref015","doi-asserted-by":"publisher","DOI":"10.1080\/00034983.1972.11686834"},{"key":"S0022172400047252_ref010","first-page":"65","article-title":"Rift Valley fever","volume":"10","author":"Easterday","year":"1965","journal-title":"Advances in Veterinary Science"},{"key":"S0022172400047252_ref002","first-page":"105","article-title":"Rift Valley fever in the Union","volume":"22","author":"Alexander","year":"1951","journal-title":"Journal of the South African Veterinary Medical Association"},{"key":"S0022172400047252_ref012","first-page":"908","article-title":"Rift Valley fever in South Africa. The occurrence of human cases in the Orange Free State, the north western Cape Province, the western and southern Transvaal. B. Field and Laboratory investigations","volume":"25","author":"Gear","year":"1951","journal-title":"South African Medical Journal"},{"key":"S0022172400047252_ref005","doi-asserted-by":"publisher","DOI":"10.1002\/path.1700340418"},{"key":"S0022172400047252_ref014","doi-asserted-by":"crossref","unstructured":"Haig D. A. (1951) cited by Alexander & Dickson (1951), above.","DOI":"10.2307\/1438094"}],"container-title":["Journal of Hygiene"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.cambridge.org\/core\/services\/aop-cambridge-core\/content\/view\/S0022172400047252","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2019,5,29]],"date-time":"2019-05-29T15:08:34Z","timestamp":1559142514000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.cambridge.org\/core\/product\/identifier\/S0022172400047252\/type\/journal_article"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[1975,10]]},"references-count":15,"journal-issue":{"issue":"2","published-print":{"date-parts":[[1975,10]]}},"alternative-id":["S0022172400047252"],"URL":"https:\/\/doi.org\/10.1017\/s0022172400047252","relation":{},"ISSN":["0022-1724"],"issn-type":[{"value":"0022-1724","type":"print"}],"subject":[],"published":{"date-parts":[[1975,10]]},"assertion":[{"value":"Copyright \u00a9 Cambridge University Press 1975","name":"license","label":"License","group":{"name":"copyright_and_licensing","label":"Copyright and Licensing"}}]}}