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  • Title: Contribution towards developing a new semi-selective medium for Streptococcus anginosus group.
    Author: Băncescu G, Băncescu A, Neagu AS, Radu-Popescu M, Bărbuceanu SF.
    Journal: Rev Med Chir Soc Med Nat Iasi; 2009; 113(4):1243-8. PubMed ID: 20191907.
    Abstract:
    UNLABELLED: The aim of this study was to develop a new selective medium for isolation of Streptococcus anginosus group (SAG) strains, by adding sulphamethazine and aztreonam as selective agents at Mitis-Salivarius agar (MSA), the medium commonly used for recovery of oral streptococci from oral samples. MATERIAL AND METHOD: The evaluation of Mitis-Salivarius--sulphamethazine--aztreonam agar (MSSAA) for SAG selectivity was performed by testing the growth of type strains and laboratory-stored clinical isolates of different oral streptococcal species on this medium and also by investigating the SAG recovery on MSSAA in comparison with MSA and the growth inhibition of non-SAG strains from 100 saliva and 11 pus samples (collected from healthy young subjects and from paediatric patients with upper respiratory tract infections, respectively) on MSSAA. RESULTS: The same SAG recovery rate was obtained on both MSSAA and MSA, while non-SAG strains failed to grow on the novel medium, except for enterococci. The results of the present study have indicated that MSSAA is a suitable medium for selecting SAG isolates from clinical specimens.
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