473. The serological classification ofStreptococcus cremoris
- 1 June 1952
- journal article
- research article
- Published by Cambridge University Press (CUP) in Journal of Dairy Research
- Vol. 19 (2), 160-166
- https://doi.org/10.1017/s0022029900006397
Abstract
1. Attempts to produce in rabbits group N sera forStreptococcus cremoris, using suspensions of living, disintegrated and heat-treated bacterial cells, yielded only non-specific products, cross-reactions occurring most commonly and intensively with HCl extracts of the streptococci of groups K and L.2. The non-specific antibodies in these sera were completely removed by absorption with streptococci of group K or L, the group N reactions being only partially impaired.3. In order to inactivate, before immunizing rabbits, that antigen in the ‘cremoris’ cells responsible for stimulating the production of non-specific antibodies, the organisms were ‘absorbed’ with an excess of group K or L antiserum.4. With suspensions of organisms treated in this way, potent group N specific precipitating sera were obtained for both freshly isolated and freeze-dried strains ofStr. cremoris.5. The identity ofStr. cremoriswith serological group N is thus established.This publication has 14 references indexed in Scilit:
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