Thermo Scientific™ Strep Selective II Agar

Description

• Selectively isolate β-hemolytic Group A Streptococcus from throat cultures and upper respiratory specimens using Thermo Scientific™ Remel™ Strep Selective II Agar (w/colistin, oxolinic acid)
• Pacifico at al
• demonstrated the isolation of β-hemolyic streptococci is improved with the use of a selective medium which inhibits oropharyngeal commensal microbial flora 1
• In 1984, Pelts developed a selective medium containing colistin and oxolinic acid 2
• This medium was valuable for isolation of streptococci from mixed flora, resulting in increased isolation rates and early identification of isolates
• Clinical assessment alone is unreliable in distinguishing streptococcal and non-streptococcol pharyngitis 3
• Serious medical complications may follow pharyngitis caused by group A streptococci, making bacterial examination of the throat an indispensable diagnostic tool
• Use of Strep Selective II agar is recommended for selectively isolating β-hemolytic Group A Streptococcus from throat cultures and upper respiratory specimens
• Ready-to-use : Convenience of prepared media Selective: Antimicrobial agents colistin and oxolinic acid inhibit growth of staphylococci, coryneforms, and gram-negative organisms
• This medium contains Tryptic Soy Agar supplemented with sheep blood as the base medium for luxuriant growth and enhanced hemolytic reactions of streptococci
• Casein and soy peptones in TSA provide a nutritious source of nitrogen, amino acids, and peptides necessary for bacterial growth
• Sheep blood provides growth factors and allows detection of hemolytic reactions
• Colistin and oxolinic acid provide good growth from a very small inocula and show no effect on streptococci while effectively inhibiting staphylococci, coryneforms, and gram-negative organisms
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• Remel™ and Oxoid™ products are now part of the Thermo Scientific brand.