The test includes culture for the following isolates only: Groups A, C, and G streptococci, Arcanobacterium haemolyticum, and Pseudomonas aeruginosa (children and young adults <18 years of age ONLY). The presence and quantity of normal flora will be reported.
Daily, 24 hours
Group A Streptococcal antigen screen STAT: 30 minutes after receipt of the specimen in the laboratory. Preliminary culture reports are available after 24 hours. Cultures with no growth or normal flora only will be issued after 48 hours. Completion of culture reports may take 3-4 days after receipt of the specimen when multiple isolates are found.
If N. gonorrhoeae is suspected, a separate request for culture for N. gonorrhoeae only should be ordered.
Specimen should be transported as soon as possible. When transportation is delayed, leave at room temperature.
Negative for Group A Streptococcus by direct antigen screening; no Groups A, C, or G streptococci, Arcanobacterium haemolyticum, or Pseudomonas aeruginosa isolated.
Direct antigen screen: immunochromatographic assay. Culture: conventional culture on routine and selective media.
Susceptibility testing will be performed routinely for P. aeruginosa ONLY. If only isolation of Neisseria gonorrhoeae is required, request Culture for N. gonorrhoeae Only. If only isolation of Group A Streptococcus is required, request Throat Culture for Group A Streptococcus Only. A positive Group A Streptococcal antigen screen result can be relied upon as a rational basis to begin therapy. Group A Streptococcus, S. pyogenes, is universally susceptible to penicillin and its derivatives, therefore, susceptibility testing is NOT performed.