| Abstract: |
Four hundred and fifty-nine freshly dea~ chickens of different ages and from different localities, inDomitta Province, suspected to be suffering from colisep-ticaemia were exposed to P • and bacteriological exand.natd.on,Bacteriological isolation frOllt heart blood and bone marrow revealed that 145 isolates were suspected to be•. coli by It Their culture characteristics, staining reaction~d biochemical reactions.2) The serological typing of the suspected E. isolates revealed that the isolated 26 E~ coli serogroups were01, 02, 03, 08, 015, 026, 053, 078; 086, 0111, 0115, 01l7,0126, 0127, 0156, 0158, 0162,0136, 080, 071, 049, 021, 013010, 06 and 0157 . .:ill • .£.ill serogroupe 0111 WaS the uos b isolatedtreou.Lnant; strains (26.9 %).3) The sensitivity of the isolated E. coli strains toantibiotics and cheuotherapentic agent ,revep.led that the -’,; r ’.isolated strains were resis,tant to streptomycin, colistinecl.imyc i.n , tetrac’ycline danalIlycin,0liloramphenicol, neomycin,aupicillin, nitrofurantoin, Iteflodine and l’Talidixic acid inthe fo Ll ow.i ng decreasing percentages: 81.5, 78.7, 78.7, 52.6,
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