Incidence of Avian Tubercle Bacilli in Poultry Eggs in Upper Egypt and Some Trials in Methodolgy

1 •• :L500 eggs f1’o01 d1ffe1’ent localaties in upper Egypt we.reexam.ned baote1’iologically f.rom the out er su.rface and cont-ent and proved to be f.ree f.’i:’~ycobaoterium. avd.um and othe.t’aaonymoue Myo obaote.ria.2 •• Four methods were used for treating the eggs and it Wasproved that modified Pe t r off , s method is excelled the o ther a,3 •• It was also proved that ogawa egg media is the best onefor Mycobacterium avium.4 .• FoX’ identification of the O1ic.I’oorganism se’Ve.ral methodswere used as:A. Cutlu.re screening tests on aever at tubei’Culostatio~ent as acetaillide, benzamide, oarbamide, .nicotinam~de and80diUill salioylate w,ere pr-oved as useful tests fo.r distillgu-ishing anonymous mycabecte.ria including roycobactel’ium a’Viumfrom othe.r aoid fast bacilli.B. Biochemical tests we.re used as a trial for identif-ication as niacin test, peroxidase test and nit.t’ate reduct-ion test. The st.rain p.roved to be only catalase 90sitive atdiffe.rent tempe1’ature but niacin, nitrate .reduction and p.e!J-’oxidase negative.C. The avian st.rain was tested against many tube.rculost-atic dr ug s as st.I’ept~cin. paraammino salicylic acid,