Ivins B E, Fellows P F, Nelson G O
Bacteriology Division, United States Army Medical Research Institute of Infectious Diseases, Fort Detrick, Frederick, MD 21702-5011.
Vaccine. 1994 Aug;12(10):872-4. doi: 10.1016/0264-410x(94)90027-2.
The efficacy of an anthrax vaccine licensed for human use, MDPH-PA, was tested in guinea-pigs intramuscularly challenged with 10, 100 or 1000 LD50 of spores from two virulent strains of Bacillus anthracis, Vollum 1B and Ames. As demonstrated in other investigations, immunization with MDPH-PA provided better protection against challenge with the Vollum 1B strain than with the Ames strain, although vaccine efficacy against the Ames strain was better than previously reported. Enzyme-linked immunosorbent assay of serum antibody titres to B. anthracis protective antigen showed that there was no significant correlation between survival and antibody titres.
