摘要:
An organic acid is produced by allowing a bacterium which has an ability to produce an organic acid and has been modified so that expression of yidE gene is enhanced or a product obtained by processing the bacterium to act on an organic raw material in a reaction mixture containing carbonate ions, bicarbonate ions, or carbon dioxide gas to produce the organic acid, and collecting the organic acid.
摘要:
The present invention is related with Microbiology and particularly with a nutrient mixture and a procedure for the identification and the early count of Gram-negative organisms. This mixture allows the development of five different colony colors in the organisms to be detected, and the appearance of three colored fluorescent emissions, the appearance of three different colors halos and zones with opaque precipitates surrounding such colonies. Those factors, together with the color changes in the medium, allow a differentiation with a high sensibility and specificity level. The mixture include specific relations of the mixtures of tryptophan rich protein fractions, free tryptophan, organic or inorganic salts, color or fluorescence providing substances, cellulose and hemi cellulose and other components which provide from 1 to 2 layers in the composition.
摘要:
A vaccine against a microbial pathogen comprised of a live, immunogenic but prototrophic and avirulent mutant strain of the selected microbial pathogen in an amount effective to confer immunity. A method of obtaining a vaccine that induces a heightened cellular and humoral immune response to one of a variety of microbial pathogens in a warm blooded animal. A method for isolation of an avirulent strain of a selected pathogenic microorganism.
摘要:
The present invention is drawn to conjugates and vaccine compositions comprising a Pseudomonas flagellin or an antigenic fragment or derivative thereof linked to one or more Klebsiella surface polysaccharide antigens, such as Klebsiella pneumoniae O polysaccharide from serovars O1, O2a, O2a,c, O3, O4, O5, O7, O8 and O12. The present invention also provides serovar reagent strains to produce the conjugates and vaccine compositions and methods of inducing an immune response with the conjugates and vaccine compositions.
摘要:
An L-glutamic acid producing bacterium which belongs to the genus Pantoea, Enterobacter, Klebsiella or Erwinia, wherein the bacterium has been modified by gene recombination to inactivate the rpoS gene, is cultured in a medium to cause accumulation of L-glutamic acid in the medium, and L-glutamic acid is collected from the medium.