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Infection and Immunity logoLink to Infection and Immunity
. 1975 Apr;11(4):649–655. doi: 10.1128/iai.11.4.649-655.1975

Growth of several cariogenic strains of oral streptococci in a chemically defined medium.

B Terleckyj, N P Willett, G D Shockman
PMCID: PMC415117  PMID: 1091546

Abstract

A chemically defined medium in which Streptococcus mutans strains AHT, BHT, GS-5, JC-2, Ingbritt, At6T, At9T, 6715, and OMZ-176 and Streptococcus salivarius strain HHT grew rapidly to high turbidities was formulated. Maximal turbidities of each strain were observed after 8 to 12 h of aerobic growth. The subsequent transfer of exponentially growing cells into fresh medium resulted in growth at the same rate without lag. Growth of these strains occurred with rates at least one-half of those observed in an organic medium, such as Todd-Hewitt broth. S. mutans strains FA-1 and OMZ-61 grew at relatively slow rates in the defined medium, but more rapidly growth to higher turbidities of both strains was obtained when sodium bicarbonate was added to the medium. Streptococcus sanguis strain OMZ-9 and another group H streptococcus (strain 72 times 46) grew rapidly in the defined medium after the addition of sodium carbonate. The presence of carbonate or bicarbonate yielded higher turbidities of all the other strains, and the growth rates of several of the strains tested were also increased.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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