| abstract |
A variety of modified Bacillus anthracis bacteria useful in vaccines are provided. For instance, asporogenic strains of Bacillus anthracis are provided. In addition, Bacillus anthracis strains attenuated in their ability to repair their nucleic acid, such as in their nucleic acid excision repair ability or recombination repair ability, are provided. Strains expressing an antigen, such as protective antigen, under the control of a heterologous promoter and/or an inducible promoter are also provided. Bacillus anthracis bacteria comprising mutations in toxin genes are further provided. Vaccine compositions comprising the bacteria, methods of making the modified strains, and methods of using the vaccines are also provided. |