Fowl cholera immunization in turkeys. II. Use of experimental epornitic method to study vaccine efficacy in flocks of turkeys.
Groups of turkeys were challenged with Pasteurella multocida (P-1059) by the contact method. In this method, turkeys are artificially infected by the intramuscular injection of P. multocida organisms and are then introduced into the test group. The death patterns resulting from this contact method of challenge are either normally distributed or skewed to the right.
Studies on pasteurellosis. IV. Killed fowl cholera vaccine absorbed on aluminiumhydroxide.
HREE experiments are reported in this paper. Experiment A was a study to determine the efficacy of aluminum hydroxide gel as an adjuvant in killed fowl cholera vaccine. Expriment B was designed to determine (1) if this vaccine would stimulate and maintain a high degree of immunity for 52 weeks, and (2) if the stress of mixing vaccinated males from different flocks at time of challenge would affect their resistance to fowl cholera. Experiment C was a study to determine if birds could be immunized against fowl cholera and withstand exposure to virulent cultures of Pasteurella multocida while infected with fowl pox virus. A method for production of an effective water-in-oil emulsified fowl cholera veccine was presented in a previous paper.'
FOWL CHOLERA: COMPARISON OF SEROLOGIC AND IMMUNOGENIC RESPONSES OF CHICKENS AND TURKEYS.
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