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. 1983 Sep;18(3):680–682. doi: 10.1128/jcm.18.3.680-682.1983

Effects of trimethoprim-sulfamethoxazole and incubation atmosphere on isolation of group A streptococci.

C R Libertin, A D Wold, J A Washington 2nd
PMCID: PMC270874  PMID: 6415095

Abstract

The effects of selective media and incubation atmosphere on the isolation of group A beta-hemolytic streptococci were evaluated. A higher percentage of group A streptococci was isolated on sheep blood agar incubated in air than in CO2 or anaerobic atmospheric conditions. Fewer non-group A beta-hemolytic streptococci were isolated on sheep blood agar incubated in air than in CO2 or anaerobically. Group A streptococcal isolation was not significantly affected by different incubation atmospheres on sheep blood agar containing trimethoprim-sulfamethoxazole, but detection time was longer than on sheep blood agar alone. No significant difference was found between isolation of group A streptococci on sheep blood agar incubated in air and that on sheep blood agar containing trimethoprim-sulfamethoxazole and incubated in 5 to 10% CO2; however, more group A streptococci were isolated on sheep blood agar in air within 24 h. Sheep blood agar incubated at 35 degrees C in air is, therefore, recommended for the isolation of group A streptococci from throat swabs.

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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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