Abstract
Eldering, Grace (Michigan Department of Public Health, Grand Rapids), Jack Holwerda, and Julia Baker. Bordetella pertussis culture having only species factor 1. J. Bacteriol. 91:1759–1762. 1966.—Preston's description of Bordetella pertussis 353-Z as a culture possessing only factor 1 was confirmed by agglutination and agglutinin-adsorption tests. The ld50 values of this culture for mice inoculated by the intracerebral route were approximately the same as that of B. pertussis 18-323, the challenge culture in mouse potency tests of pertussis vaccine. In mouse protection tests, vaccine prepared with the factor 1 culture protected as well against challenge with B. pertussis 18-323, which has a broad antigenic pattern, as did vaccines made with cultures possessing factors 2, 3, 4, and 5 in addition to factor 1. When two groups of similarly immunized mice were challenged with 353-Z and 18-323, respectively, much lower ed50 values were obtained with the animals challenged with 353-Z. This was true whether a factor 1 vaccine or a vaccine with factors 1, 2, 3, 4, and 5 was tested.
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Selected References
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