Use of Membrane Proteins from Salmonella gallinarum for Prevention of Fowl Typhoid Infection in Chickens

Abstract
Outer membrane protein isolated from Salmonella gallinarum was examined at different concentrations with or without a mineral-oil adjuvant for its immunogenicity and protection against live challenge. A formalin-killed whole-cell bacterin of the same organism was used for comparison. The results suggested that membrane proteins from S. gallinarum give better protection than formalin-killed whole-cell bacterin. Addition of an oil adjuvant to the protein appeared to increase the efficiency of the vaccine. When protein was given to chickens at 400 .mu.g/100 g of live body weight, it produced 100% protection against oral challenge with S. gallinarum.

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