Evaluation of primary plating media for the isolation of group A streptococcus from delayed throat cultures.
Sulfamethoxazole-trimethoprim blood agar (SXT-BA), neomycin blood agar (NEO-BA) and plain sheep blood agar plates (SBA) were compared for isolating group A streptococci in 1,954 throat cultures. SBA and SXT-BA had similar isolation rates (approximately 75% of all positive isolates). NEO-BA was significantly better (87% recovery). A combination of any two media gave 92-95% recovery of group A streptococci from throat specimens.
D000293:Adolescent; D000362:Agar / Q000592:standards*; D000818:Animals; D002648:Child; D002675:Child, Preschool; D006801:Humans; D009355:Neomycin; D010612:Pharyngitis / Q000382:microbiology*; D012756:Sheep; D013290:Streptococcal Infections / Q000175:diagnosis; D013291:Streptococcus / Q000302:isolation & purification*; D013420:Sulfamethoxazole
D000362:Agar; D009355:Neomycin; D013420:Sulfamethoxazole