Studies on Fowl Cholera In Ducks And Its Control

1) 146 dead ducks and.187 nasaL cleft and tracheal swabs from apparently he a.it hy du ck s c, c o Ll.e c’t ed from differ- en pr-ovz.nce s been examined bac’t er-Lo Log.l.c ai.Ly .i,n trials for isolation of duck cholera microorganism .2} Eleve:o. isolates W8:.’~e obtained and their biochemicalbehaviour was c l.os e.Ly related to f.aste~re!1-a p1Ul.tocida organism’).3) 8erologice.l typing by K’-0apsular antigen ahowed ; 6 of the isolates W8l”O f’cund as typ3 D tlCm.”’terlV, 4 as type A ”Cartertl ~ wh.l.Le one iEj:)late remained urrt ypab l,e ,4) Experimen’!ial infection of healthy ducks with the isolated strains ahowe d that 7 strains were highly v.i.r-u Lerrt.3 were of moderate virulence and one wa3 more or less avirulent.5) Sensitivity of the eJ.even iso::’ates t9 some antimiQro-bial agents wa~ 8tudied~6) It is reCoriliilenaed to use both type A and D in vaccine preparation in A.R.E.