drying spray drying and freeze drying in addition to the salmonella gallinarum variant of the present invention the feedstuff of the present invention may further comprise a typical additive useful for improving the preservation of the feedstuff the feedstuff comprising the salmonella gallinarum variant of the present invention may be vegetable matter such as a cereal nut a by product of food processing millet fiber pharmaceutical by product a vegetable oil starch oil seed meals and cereal remnants or animal matter such as proteins minerals fats mineral oils unicellular proteins animal planktons and leftover food etc examples of the feed additive comprising the salmonella gallinarum variant of the present invention include but are not limited to various agents for preventing quality deterioration and improving utility such as binders emulsifiers preservatives amino acids vitamins enzymes probiotics flavoring agents non protein nitrogen compounds silicates buffer colorants extracts oligosaccharides etc also a mixing agent may be within the scope of the feed additive in accordance with still a further aspect thereof the present invention provides a method for treating the salmonella gallinarum infectious disease fowl typhoid using the pharmaceutical composition the composition of the present invention may be administered to animals in the form of a pharmaceutical preparation to animals or in the form of being mixed with feedstuff or water preferably it is mixed in the form of a feed additive with feedstuff before administration so long as it allows the composition of the present invention to reach tissues or cells of interest any administration route such as non oral intraartery intradermal transdermal intramuscular intraperitoneal intravenous subcutaneous oral or intranasal route may be taken the treating method of the present invention.