[Development of a simple medium for the selective isolation of bacteria belonging to the Streptococcus anginosus group]. / Desarrollo de un medio simple para el aislamiento selectivo de bacterias del grupo Streptococcus anginosus.

Bacteria of the Streptococcus anginosus group (SAG) have recently been recognized as contributors of bronchopulmonary disease in cystic fibrosis (CF). Routine detection and quantification are limited by current CF microbiology protocols. The development of the CHROMagar™ StrepB chromogenic medium modified by the addition of plasma, nalidixic acid, colistin and sulfadiazine to make it selective for SAG bacteria is described. This medium could be used as a diagnostic tool to detect SAG in respiratory samples from patients suffering from chronic lung disease.