The present invention relates to nucleic acids, vectors and polypeptides that are suitable markers for detecting Streptococcus strains of the anginosus group, preferably for detecting Streptococcus anginosus and/or Streptococcus constellatus as well as for discriminating Streptococcus anginosus and/or Streptococcus constellatus from other streptococci. The present invention furthermore relates to these nucleic acids and polypeptides for use in the diagnosis and/or prognosis of infections with Streptococcus strains of the anginosus group. The present invention furthermore relates to methods utilizing these nucleic acids and polypeptides as well as to arrays and antibodies.
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