Belihu, Dr KclayJergefa, Tujuba2021-10-112023-11-082021-10-112023-11-082006-06http://etd.aau.edu.et/handle/123456789/28093" cross-sectIonal ~cro-cpidcrnJl)logical study or 110\ IIlC brucellos is \\ ;\s carned out in thn:c difcfcrcnmt ngroccologlcs of cellt ral Oromia. Ethiopia. T he stud) \\as conducted li'orn Sept em her 2005 to ~larch 2U06 to dctcnnlllC the o\erall c urrcllI cpi dcmi ologicnl pi c ture of Ihe disease and the effect of pot ential risk f~lcto rs in the stud y areas. A total of 176 households (ElrillS) and the 1238 illlll11 a is were selected randomly by Olle stage cluster sa mplin g method from all tht: three agro-ccological arcas. From the lowla nd areas. 59 households and -l2J ~1Il1I1lal~' \\"lfC sd .:tL'1 1 '.\ 1,11 "S 1, uscholt1s lid S:- ,\jllln.tlS ,\..:n: selected from the lllid-hi~h1alld arC;I'-' 31H I ';;9 hnu<;ch,)lds and ·no :lllirn .. lI!' fr01ll the highland areas. Serum samples (12~Sl were collecled once from <'111 animals abo \ c si x month of age and \\ ere tested uS1I1g RBPT (a'i a screening lesl) Jnd eFT (~ I S a confinnJlory lesl) to detect brucdl.1 :-,':~I,.lPl'Slli\it). Quc"tlOlln:mcs \'.1.1 .... ,II so administered to the 176 households 10 gather IIlfOnll<1tlon on f:mll and CO\\ allnbulcs. The results .showed Ihal Ihc o\'crall serapn.;\ alence ofbo\ lIle hrucellosis at CO\\ le\'el \\ as 2 <)()O II. The sero pre\'a\cnce \.Inct! from 1.IJ.l"n IIlllle Illid-highland. ~A8u~o lilihe highland and -l .26n,o III the 10\\ land. The o\erall hcrd k\c1 seroprc\alcncc \\JS IJ ,6 -l °o. At herd le\cl. the seroprnaJcnce \\as IS.6-l"u 111 Ihe l11ghblld . I'''" 111 the 10\\13nd Jnd 5.1"'°". in mid- altitude agroecology. The result of lllll\'aratc logisllc regression shO\\ctl th,lI breed Jnd managemcnl had stallstlcally s!gnlficant effect on co\\ le\ cl bonne brucellosis seropre\'alcncc (p':(J.05) III the o\erall studIed areas. In the 10\\ land. breed (p..-:O.05 ). rnanagcme!H system (p' (Ull). Illtltlllg method (p lUll) ,lilt! source of replacement stock (J><...(J.OI) had slgmlicallt elTeel on thc CO\\ len;-1 sc roprc\alencc of bo\"ine brucellosis. In the muhl\ariate 10::;lstlc regn .. 'sslon tl::;t. olll} management j~ICtor had slglllfieallt effect III thc lowland areas (., (I (If 1) T] potcntial fisk factors conSidered on the 0\ crall and agroecolog). specific scroprc\'atcncc (1'>0.05). The resuits of questionnaire sur\'e~ showed that ra rm ers had 10 \\ awarencss on hrucclJosls and were not practiclllg the necessar) preC<lUIlOnS to prc\'cnt and cont!'Ol thr disease. In conclusion. IIldi\idui.1i animal serorrc\alence \\ as 10\\ \\ hi Ie moderate seroprnalencc was ohscned at hcrd level. I3rccd. management systelll. IF'rd Sl/e. mating method and sources of rcpiac(:l11cnt stock \\cre round to be Important risk raclOrs to IX hovin\.! brucdlosis ill Ihc study ar\.!asenBovine. brucellosis brucellosis. scroprcvalctlcc. agroccology. Orolllia. EthiopiaThesis