Abstract
Sheep blood agar containing 23.75 μg of sulfamethoxazole and 1.25 μg of trimethoprim (SXT-BA) per ml was compared with conventional sheep blood agar (SBA) for isolating group A and B streptococci from throat cultures. This selective medium allowed much better recovery of group A and B streptococci and suppressed the growth of the normal flora, including 'viridans' streptococci. In an initial study of 700 throat cultures, SXT-BA recovered 42% more group A and 49% more group B streptococci than did SBA. When SXT-BA was introduced into the routine microbiology laboratory and used by a number of medical technologists, SXT-BA recovered 28% more group A and 37% more group B streptococci than did SBA. In addition, the selective medium inhibited 83% of the non-group A and B streptococci that were recovered by SBA.
Original language | English (US) |
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Pages (from-to) | 650-655 |
Number of pages | 6 |
Journal | Journal of clinical microbiology |
Volume | 5 |
Issue number | 6 |
State | Published - Dec 1 1977 |
Externally published | Yes |
ASJC Scopus subject areas
- Microbiology (medical)