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Para-immunity


, : Para-immunity. Zeitschr Immunitatsforsch U Exp Therap 47(3/4): 347-362

In the process of infection there must be considered the reciprocal reactions of the macroorganism and the infecting microbe, as well as the reaction of the bacterial flora existing in the host upon the intruding microbe. Thus colon bacilli and cocci isolated from feces of dysentery patients were strongly agglutinated by dysentery serum. immunization of rabbits with such cultures of Bad. coli produced agglutinins against dysentery bacilli, and against cocci showing paragglutination with dysentery serum. In analogy with the accepted term, paragglutination, the author proposes the words "para-immunity" and "para-microbes." Bact. proteus was cultured in a small collodium sac immersed in different fluid media containing typhoid bacilli. Single colonies of proteus grown out of tne collodium sac were tested with 1-10 dilution of typhoid serum; those showing agglutination were subcultured again in the collodium sac. Strains of paraproteus were obtained, giving titers up to 1-640 with typhoid bacilli. Contents of the collodium sacs were tested for possible presence of typhoid bacilli but none were found. Only 3 out of 50 colonies from different original strains of Bact. proteus could be transformed into paraproteus. Paragglutination generally disappeared after a few ordinary sub-cultures; but such cultures could be retransformed into paraproteus in a shorter time than any original culture. Rabbits immunized with paraproteus showed antityphoid agglutination titer up to 1-3200. Rabbits immunized with typhoid bacilli survived injection of a lethal dose of paraproteus, while 7 out of 8 control rabbits died within 24 hrs. Fourteen rabbits were immunized with paraproteus and then infected with a lethal dose of typhoid bacilli; 12 survived, 1 died after 24 hrs., 1 after 8 days. Of the controls, 14 out of 15 died within 24 hrs.

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