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dc.contributor.authorMekonnen, GA
dc.contributor.authorConlan, AJK
dc.contributor.authorBerg, S
dc.contributor.authorAyele, BT
dc.contributor.authorMihret, A
dc.contributor.authorOlani, A
dc.contributor.authorAsgedom, H
dc.contributor.authorETHICOBOTS consortium
dc.contributor.authorWood, JLN
dc.contributor.authorAmeni, G
dc.date.accessioned2021-03-01T10:22:18Z
dc.date.available2021-03-01T10:22:18Z
dc.date.issued2021-02-24
dc.identifier.issn0950-2688
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/318230
dc.description.abstractThe Ethiopian government has several initiatives to expand and intensify the dairy industry; however, the risk of bovine tuberculosis (bTB) spread is a challenge. To assess the rate of expansion and risk factors for transmission of bTB within-herds, we carried out a repeated cross-sectional survey at two time points, 2016/17 and 2018, in three regional cities, namely, Gondar, Hawassa and Mekelle, representing the emerging dairy belts of Ethiopia. The total number of herds involved was 128, comprising an average of 2303 cattle in each round. The Single Intradermal Comparative Cervical Tuberculin (SICCT) test was used to identify reactor status and data on herd-level risk factors were collected using a structured questionnaire. In the first survey, the apparent prevalence of bTB, as measured by the SICCT test, was 4.5% (95% CI 3.7-5.4%) at the individual animal-level and 24% (95% CI 17.5-32%) at the herd-level. There was no statistically significant change in the overall apparent prevalence or regional distribution at the second survey, consistent with the infection being endemic. The incidence rate was estimated at 3.6 (95% CI 2.8-4.5) and 6.6 (95% CI 3.0-12.6) cases/100 cattle (or herd)-years at the animal- and herd-levels, respectively. Risk factors significantly associated with the within-herd transmission of bTB were age group and within-herd apparent prevalence at the start of the observation period. We noted that farmers voluntarily took steps to remove reactor cattle from their herds as a consequence of the information shared after the first survey. Removal of reactors between surveys was associated with a reduced risk of transmission within these herds. However, with no regulatory barriers to the sale of reactor animals, such actions could potentially lead to further spread between herds. We therefore advocate the importance of setting up regulations and then establishing a systematic bTB surveillance programme to monitor the impact prior to implementing any control measures in Ethiopia.
dc.format.mediumElectronic
dc.languageeng
dc.publisherCambridge University Press (CUP)
dc.rightsAll rights reserved
dc.subjectETHICOBOTS consortium
dc.subjectAnimals
dc.subjectCattle
dc.subjectHumans
dc.subjectTuberculosis, Bovine
dc.subjectSkin Tests
dc.subjectIncidence
dc.subjectRisk Factors
dc.subjectCross-Sectional Studies
dc.subjectDairying
dc.subjectEthiopia
dc.subjectFarmers
dc.titleDynamics and risk of transmission of bovine tuberculosis in the emerging dairy regions of Ethiopia.
dc.typeArticle
prism.publicationDate2021
prism.publicationNameEpidemiol Infect
prism.startingPagee69
prism.volume149
dc.identifier.doi10.17863/CAM.65350
rioxxterms.versionofrecord10.1017/S0950268821000480
rioxxterms.versionAM
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserved
rioxxterms.licenseref.startdate2021-02-24
dc.contributor.orcidMekonnen, GA [0000-0002-7605-5433]
dc.identifier.eissn1469-4409
rioxxterms.typeJournal Article/Review
pubs.funder-project-idBiotechnology and Biological Sciences Research Council (BB/L018977/1)
pubs.funder-project-idBiotechnology and Biological Sciences Research Council (BB/S013806/1)
cam.issuedOnline2021-02-24
rioxxterms.freetoread.startdate2100-01-01


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