Preparation of a tuberculosis test medium by reconstituting a storage stabilized dry powdered Lowenstein-Jensen medium
AssigneeBeatrice Foods Co.
InventorWilmore Williams
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Abstract
A storage stable Lowenstein-Jensen medium is prepared by spray drying the liquid medium at an outlet temperature of up to 212.degree. F. to provide a powder having a moisture content of less than 9% by weight. The spray-dried powder is stable at ambient temperature for at least six months and may be easily reconstituted to the fluid Lowenstein-Jensen medium and used in testing for tuberculosis by simple mixing at ambient conditions.
Claims4
A method for producing a tuberculoses test medium from a reconstituted dry powdered, storage stabilized Lowenstein-Jensen medium comprising preparing a Lowenstein-Jensen medium which includes fresh whole eggs, nutrient salts and stabilizers, spray drying the medium in a spray dryer at an inlet temperature of between 230.degree. F and 280.degree. F and an outlet temperature of between 160.degree. F and 190.degree. F and under dryer conditions consistent with providing the dried powder with a moisture content of less than 9% by weight, recovering and packaging the dried powder, storing the packaged powder under ambient conditions, forming a reconstituted medium having a solids content of between 10-20% by weight from said powder, and inspissating said reconstituted medium to provide a medium used in testing for tuberculoses.
Dependencies are inferred from the claim text.