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. 1927 Jul 31;46(2):343-56.
doi: 10.1084/jem.46.2.343.

STUDIES ON IMMUNITY TO PNEUMOCOCCUS MUCOSUS (TYPE III) : III. INCREASED RESISTANCE TO TYPE III INFECTION INDUCED IN RABBITS BY IMMUNIZATION WITH R AND S FORMS OF PNEUMOCOCCUS

W S Tillett  1
Affiliations

STUDIES ON IMMUNITY TO PNEUMOCOCCUS MUCOSUS (TYPE III) : III. INCREASED RESISTANCE TO TYPE III INFECTION INDUCED IN RABBITS BY IMMUNIZATION WITH R AND S FORMS OF PNEUMOCOCCUS

W S Tillett. J Exp Med. .

Abstract

1. Immunization of rabbits with Type III pneumococci is effective in producing active immunity against infection with a virulent strain of the homologous organism. 2. Immunization of rabbits with Type I or II pneumococci, and with R forms derived from any of the fixed types, is equally effective in producing active immunity against Type III infection. 3. Immunization of rabbits with nucleoprotein or with desoxycholate solutions of heterologous pneumococci, under the experimental conditions described, appears to be ineffective in producing active immunity against Type III infection.

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References

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