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FURTHER STUDIES OF TWITCHING STREPTOCOCCUS SANGUIS ISOLATED FROM THE HUMAN THROAT. ISOLATION OF STRAINS WITH A NEW ANTIGEN
Author(s) -
Henriksen Sverre Dick,
Henrichsen Jørgen
Publication year - 1976
Publication title -
acta pathologica microbiologica scandinavica section b microbiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.909
H-Index - 88
eISSN - 1600-0463
pISSN - 0304-131X
DOI - 10.1111/j.1699-0463.1976.tb01962.x
Subject(s) - microbiology and biotechnology , antigen , antiserum , streptococcus , pharynx , throat , serology , biology , isolation (microbiology) , bacteria , antibody , immunology , anatomy , genetics
α‐haemolytic streptococci, classified as Streptococcus sanguis , with spreading growth due to twitching mobility were isolated from 41 per cent of 121 swab cultures from the human pharynx. Sixty‐five out of 70 isolates with spreading growth belonged to Lancefield's group H, while 5 isolates constituted a new serological entity. None of 159 non‐spreading α‐haemolytic streptococci isolated from the same cultures possessed either of these antigens. An examination of strains of types I, II and I/II described by Washburn et al. , in the group H antisera employed in the present study indicated that type I and type I/II only differ from one another in the degree of cross‐reactivity with anti‐type II serum. (The type II antigen was not demonstrated in any of the isolated strains). We support the opinion that type II should not be considered as S. sanguis.