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    • Vaccine comprising Brucella abortus which has O polysaccharide antigen absent 

      Adams, Leslie Garry; Crawford, Richard P.; Davis, Donald S.; Ficht, Thomas A.; Smith III, Roger; Sowa, Blair A.; Templeton, Joe W.; Williams, John D.; Wu, Albert M. (United States. Patent and Trademark OfficeTexas A&M University. Libraries, 1998-02-17)
      The present invention is an improved vaccine against Brucella abortus which permits differentiation between vaccinated and field strain infected cattle. The vaccine can be administered in two different forms: (1) cell ...