The In Vitro Effect Of Some dDrugs On Salmonella pullorum gallinarum and On Virus Infectivity Endpoints Of Newcastle Disease live Virus Vaccine

The work described in this thesis comprises two main parts :-Part ( I ) deals with the identification of the bac-tericidal drugs against Salmonella pullorum-gallinarum am- ong Penbritin, Cidoctine Succinate, Hostacycline, Ultabac- tin, Neomycin, Manilin, Penicillin G, streptomyci~ Sulpha-te~ Bayrena~ and Sulphadimidine Sodium.Part (II) deals with the preparation of Newcastle disease vaccine frrym the F strain, artificial contaminati-on of the vaccine with Salmonella pullorum-gallinarum, and identification of the effect of Selected bactericidal dru- gs OA virus infectivity endpoints.A review to the literature and a description of the varioUS methods used have been given.~the results achieved showed that:-1- Among the studied drugs ampicillin, chlorampheni- col, and ultabactin were found bactericidal against Salm~-nelle pu~lorum-g&llinarum.2- Addition of the baotericidal drugs to Newcastle disease virus vaccine prepared from the F strain did not