Summary
The “break” of vaccinal immunity both in the steril and nonsterile phases led the authors to perform the following experiments: the vaccinal process was experimentally induced in guinea pigs by administration of the 19-BA, vaccine strain. The intensity of the sterile (postvaccinal) immunity was studied by repeated infection with a virulentBr. melitensis culture. It has been established that 17 1/2 months after immunization in 80% of cases the guinea pigs were still immune to a single infection withBr. melitensis. In reiterated infection with one month interval broken immunity was recorded in 70% of the cases, while a three-fold succession of infection with the same time interval—showed disrupted immunity in nearly 100% of the cases and a subsequent development of a generalized infection.
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Khodzhaev, S. A study of the postvaccination immunity of guinea pigs repeatedly inoculated with a strain of brucella melitensis. Bull Exp Biol Med 47, 486–490 (1959). https://doi.org/10.1007/BF00779632
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DOI: https://doi.org/10.1007/BF00779632