Investigation of humoral responses against acute and vaccinal strain of Bacillus anthracis in animal models

Anthrax is one of the most important zoonotic diseases in the world that it has been caused by Bacillus anthracis. Ruminant’s vaccination is the most effective strategy to control the disease in Iran. in this study, the potential immunogenicity of (Sterne 34F2) and acute (17jb) vaccinal laboratory strains in animals model and the potential of polyvalan antiserum production are examinated. in this study, the amount of bacterial growth (5×106cfu) of above strains were prepared in blood agar by ultrasonic method and then the rate of protein was determinated by lowry method. Twelve rabbits divided to six groups and injected intramusculary a certain amount of live bacteria strains three times by two weeks intervals. After ten days of last injection, the blood samples were taken from the marginal vein in three times with ten days interval. The rate and stability of antibodies were determinated by indirect ELISA. The results showed that the production of antibodies have the highest quantity in groups that injected with 5×105 cfu 17jb strain after thirty days of first injection.