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Infection and Immunity, February 1999, p. 562-567, Vol. 67, No. 2
0019-9567/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.

Vaccination against Anthrax with Attenuated Recombinant Strains of Bacillus anthracis That Produce Protective Antigen

John P. Barnard,dagger and Arthur M. Friedlander*

Division of Bacteriology, United States Army Medical Research Institute of Infectious Diseases, Fort Detrick, Frederick, Maryland 21701-5011

Received 6 July 1998/Returned for modification 10 August 1998/Accepted 4 November 1998

The protective efficacy of several live, recombinant anthrax vaccines given in a single-dose regimen was assessed with Hartley guinea pigs. These live vaccines were created by transforming Delta ANR and Delta Sterne, two nonencapsulated, nontoxinogenic strains of Bacillus anthracis, with four different recombinant plasmids that express the anthrax protective antigen (PA) protein to various degrees. This enabled us to assess the effect of the chromosomal background of the strain, as well as the amount of PA produced, on protective efficacy. There were no significant strain-related effects on PA production in vitro, plasmid stability in vivo, survival of the immunizing strain in the host, or protective efficacy of the immunizing infection. The protective efficacy of the live, recombinant anthrax vaccine strains correlated with the anti-PA antibody titers they elicited in vivo and the level of PA they produced in vitro.


* Corresponding author. Mailing address: USAMRIID, 1425 Porter Street, Fort Detrick, MD 21702-5011. Phone: (301) 619-7341. Fax: (301) 619-2152. E-mail: friedlan{at}ncifcrf.gov.

dagger Present address: Department of Microbiology, State University of New York, Buffalo, NY 14214-3005.


Infection and Immunity, February 1999, p. 562-567, Vol. 67, No. 2
0019-9567/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.



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J. Bacteriol. J. Virol. Eukaryot. Cell
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Copyright © 1999 by the American Society for Microbiology. All rights reserved.