Incidence of highly pathogenic avian influenza H5N1 in Nigeria, 2005-2008

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cg.contributor.affiliationInternational Livestock Research Instituteen_US
cg.contributor.crpAgriculture for Nutrition and Healthen_US
cg.coverage.countryNigeriaen_US
cg.coverage.iso3166-alpha2NGen_US
cg.coverage.regionAfricaen_US
cg.coverage.regionWestern Africaen_US
cg.creator.identifierIheanacho Okike: 0000-0001-7059-8595en_US
cg.creator.identifierBernard Bett: 0000-0001-9376-2941en_US
cg.identifier.doihttps://doi.org/10.1111/j.1865-1682.2012.01331.xen_US
cg.isijournalISI Journalen_US
cg.issn1865-1674en_US
cg.issue3en_US
cg.journalTransboundary and Emerging Diseasesen_US
cg.reviewStatusPeer Reviewen_US
cg.subject.ilriZOONOTIC DISEASESen_US
cg.subject.ilriEMERGING DISEASESen_US
cg.subject.ilriAGRI-HEALTHen_US
cg.volume60en_US
dc.contributor.authorHenning, J.en_US
dc.contributor.authorBett, Bernard K.en_US
dc.contributor.authorOkike, Iheanachoen_US
dc.contributor.authorAbdu, P.en_US
dc.contributor.authorPerry, Brian D.en_US
dc.identifier.urihttps://hdl.handle.net/10568/21083en_US
dc.titleIncidence of highly pathogenic avian influenza H5N1 in Nigeria, 2005-2008en_US
dcterms.abstractOutbreaks of highly pathogenic avian influenza (HPAI) H5N1 occurred in Nigeria between December 2005 and July 2008. We describe temporal and spatial characteristics of these outbreaks at State and Local Government Area (LGA) levels. A total of 25 of 37 States (67.6%; Exact 95% CI: 50.2–82.0%) and 81 of 774 LGAs (10.5%; Exact 95% CI: 8.4–12.8%) were affected by HPAI outbreaks over the period from 2005 to 2008. The incidence risk of HPAI outbreak occurrence at the State level was 5.6% (0.7–18.7%) for 2005, 50.0% (30.7–69.4%) for 2006, 54.5% (29.9–80.3%) for 2007 and 0% for 2008. Only very few LGAs experienced HPAI outbreaks within the affected States. The incidence risk of HPAI outbreak occurrence on a LGA level was 0.3% (0.0–0.9%) for 2005, 6.6% (4.9–8.6%) for 2006, 4.2% (2.9–6.0%) for 2007 and 0% for 2008. The mean period between farmers noticing HPAI outbreaks and reporting them to veterinary authorities, and between reporting HPAI outbreaks and the depopulation of infected premises, was for both 4.5 days; both periods also had medians of 1 day. We have estimated the spatially smoothed incidence risk for the whole outbreak period and identified the existence of a large corridor in the western part of Nigeria and a smaller corridor in south-eastern part, where the risk of HPAI occurrence was lower than in the rest of the country. The effect of HPAI control policies on the outbreaks patterns are discussed, as well as possible reasons why HPAI did not become endemic in Nigeria.en_US
dcterms.accessRightsLimited Accessen_US
dcterms.audienceScientistsen_US
dcterms.available2012-04-25en_US
dcterms.bibliographicCitationHenning, J., Bett, B., Okike, I., Abdu, P. and Perry, B. 2013. Incidence of highly pathogenic avian influenza H5N1 in Nigeria, 2005-2008. Transboundary and Emerging Diseases 60(3):222-230.en_US
dcterms.extentp. 222-230en_US
dcterms.issued2013-06en_US
dcterms.languageenen_US
dcterms.licenseCopyrighted; all rights reserveden_US
dcterms.publisherHindawi Limiteden_US
dcterms.subjectanimal diseasesen_US
dcterms.subjectpoultryen_US
dcterms.subjectzoonosesen_US
dcterms.typeJournal Articleen_US

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Impact assessment study of the Nigeria avian influenza control and human pandemic preparedness and response project