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Streptococcus oralis is a Gram positive bacterium that grows characteristically in chains. It forms small white colonies on a wilkin chalgrenagar plate. It is found in high numbers in the oral cavity. It has been classified as a member of the Streptococcus mitis group. Members of this group are opportunistic pathogens. Strains of S. oralis produce neuraminidase and an IgA protease and cannot bind α-amylase.
- Marsh, Philip (1999). Oral microbiology. Oxford [England]: Wright. ISBN 0-7236-1051-7. Unknown parameter