title: Comparison of media and techniques for detection of group A streptococci in throat swab specimens.
abstract: Detection of group A streptococci in primary throat cultures was compared by using aerobic and anerobic incubation with selective nonselective media. Sheep blood agar plates incubated anaerobically detected 98% of the group A streptococci, whereas aerobically incubated blood agar plates which had been stabbed at the time of inoculation detected only 63%. Blood agar plates containing sulfamethoxazole and trimethoprim (23.75 and 1.25 mirograms per ml, respectively) detected only 70% of group A streptocci when incubated aerobically and 84% when incubated anaerobically.
mesh_terms: D000332:Aerobiosis; D000362:Agar; D000693:Anaerobiosis; D001769:Blood; D003937:Diagnosis, Differential; D006801:Humans; D010614:Pharynx / Q000382:microbiology*; D013290:Streptococcal Infections / Q000175:diagnosis*; D013297:Streptococcus pyogenes / Q000302:isolation & purification*; D013420:Sulfamethoxazole; D014295:Trimethoprim
chemical_list: D000362:Agar; D014295:Trimethoprim; D013420:Sulfamethoxazole