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

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cg.contributor.affiliationInternational Livestock Research Instituteen
cg.contributor.crpAgriculture for Nutrition and Health
cg.coverage.countryNigeria
cg.coverage.iso3166-alpha2NG
cg.coverage.regionAfrica
cg.coverage.regionWestern Africa
cg.creator.identifierIheanacho Okike: 0000-0001-7059-8595
cg.creator.identifierBernard Bett: 0000-0001-9376-2941
cg.identifier.doihttps://doi.org/10.1111/j.1865-1682.2012.01331.xen
cg.isijournalISI Journalen
cg.issn1865-1674en
cg.issue3en
cg.journalTransboundary and Emerging Diseasesen
cg.reviewStatusPeer Reviewen
cg.subject.ilriZOONOTIC DISEASESen
cg.subject.ilriEMERGING DISEASESen
cg.subject.ilriAGRI-HEALTHen
cg.volume60en
dc.contributor.authorHenning, J.en
dc.contributor.authorBett, Bernard K.en
dc.contributor.authorOkike, Iheanachoen
dc.contributor.authorAbdu, P.en
dc.contributor.authorPerry, Brian D.en
dc.identifier.urihttps://hdl.handle.net/10568/21083
dc.titleIncidence of highly pathogenic avian influenza H5N1 in Nigeria, 2005-2008en
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
dcterms.accessRightsLimited Access
dcterms.audienceScientistsen
dcterms.available2012-04-25
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
dcterms.extentp. 222-230en
dcterms.issued2013-06
dcterms.languageen
dcterms.licenseCopyrighted; all rights reserved
dcterms.publisherHindawi Limiteden
dcterms.subjectanimal diseasesen
dcterms.subjectpoultryen
dcterms.subjectzoonosesen
dcterms.typeJournal Article

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