Comparative Efficacy of Commercial Fowl Cholera Bacterins and Autogenous Bacterin in White Leghorn Hens Artificially Infected with Pasteurella multocida

HARSCHFIELD (1965) summarized that numerous attempts to produce immunizing agents against fowl cholera have given contradictory results. Heddleston and Reisinger (1959) reported on the value of an emulsified bacterin in controlling fowl cholera in chickens and turkeys. Emulsified bacterins have since been produced commercially by a number of companies. Nelson (1955) reported that autogenous bacterins were of practically no value in preventing recurrence of fowl cholera in infected turkey flocks. Bierer et al. (1961) supplied some experimental data indicating that a simple phenolized autogenous broth bacterin was of some value against fowl cholera in turkeys. Boyer and Brown (1963) concluded that there was room for improvement in the efficacy of the commercial bivalent emulsified fowl cholera bacterins used in turkeys. Mora (1961) has reported on the use of a liquid rapid-acting fowl cholera bacterin in both infected and noninfected flocks. In this study, a broth autogenous bacterin at various dose . . .