Studies on Colisepticaemia In chickens With Particular Reference to The Role of K-Antigen

1- The prevalance of E.coli in different organs of chickens diseascd with colisepticoaenia was deternined.’The character of E.coli isolo.tcd fron intestino.l contents of diseo.sed and appo.rontly hca.L thy birds \70..s studied.The results reveo.lcd that serogroup 078 is the ~ost fre-quent isolo. be f r-o n orgo.ns of d Ls e aaod birds• On the other hand there 1,;J8.S no correlo.tion between E. co liscregroupsisolo.ted froQ the intestinal content of diseo.sed o.nd o.pparently no~~l birds. ~oreover9 there U2S no corrclat-ion betl,lecn E. coli serogroups isolo.ted fro:J. the intestineand orgo.ns of diseo.sed b.ir ds . vVhile it is worthly tonention tiho t thcre .S relo.tive correlo.tion bc twe cn E.coli scrogroups isolo.ted f r-o..i o rgun s of diseo.sed birdso.nd intestine of o.pparently heo.lthy birds•2- All stro.ins iso 10. ted frOG or-gena of d i.s cas ed birds,co ntiai, n lC-antigen of (L,B-like) variety. While not 0..11E. coli stro.ins isol:lted f’r-ori the intestine of diseo..sed o.nd ~ppo.rcntly heo..lthy birds conto.incd K-o.ntigen.3- The ro le of K-o.ntigen in induciDg colisepticClcnio.cxperi;~lOnto.lly in day old baby chicks r-cven.Le d that the