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Streptococci with dual antigen specificity for Lancefield groups D and G

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Abstract

Streptococci have been isolated which may be identified in serological tests as belonging to Lancefield group G, but in fact belong to group D. Twenty-two cultures with this property were obtained from four countries; they includedStreptococcus bovis andStreptococcus durans as well asStreptococcus faecalis. Selected strains were studied in serological tests and cross-absorption procedures, in which it was found that the group G reaction given by these isolates is due to an epitope with at least partial identity with reference group G antigen. Identification of an enterococcus as a group G streptococcus could lead to erroneous and ineffective chemotherapy. Antibiotic sensitivity testing of streptococcus group G isolates should be a routine procedure, and bile-aesculin and salt-tolerance testing of these isolates would be a wise precaution.

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Authors and Affiliations

  1. Wellcome Research Laboratories, Langley Court, BR3 3BS, Beckenham, Kent, UK

    C. L. Harvey & M. B. McIllmurray

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  1. C. L. Harvey
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  2. M. B. McIllmurray
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Harvey, C.L., McIllmurray, M.B. Streptococci with dual antigen specificity for Lancefield groups D and G. Eur. J, Clin. Microbiol. 3, 526–530 (1984). https://doi.org/10.1007/BF02013612

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