Biochemical properties of CO2-dependent streptococci.
A total of 153 clinical isolates and 10 reference strains were employed in an investigation of CO2-dependent streptococci. Their selection was based on a lactic acid homofermentative end product. This group of organisms grew best in 5 to 10% CO2, and several species, including Streptococcus mutans, S. intermedius, Streptococcus MG, S. anginosus, and S. constellatus, required increased CO2 for primary recovery. A basal medium of thioglycolate with 0.1% Tween 80 and phenol red was prepared and used with selected carbohydrates. This media provided luxuriant growth. Serological testing failed to give any definitive correlation with species identification. A shortened differentiation scheme, combined from previous studies, was proposed.
D050260:Carbohydrate Metabolism; D002245:Carbon Dioxide / Q000378:metabolism*; D003470:Culture Media; D005285:Fermentation; D006461:Hemolysis; D006801:Humans; D012703:Serotyping; D013045:Species Specificity; D013290:Streptococcal Infections / Q000382:microbiology; D013291:Streptococcus / Q000145:classification / Q000378:metabolism*
D003470:Culture Media; D002245:Carbon Dioxide