Name: Strep A Screen, Rapid Ag, Culture if Neg
Test Name: Strep A Screen, Rapid Ag, Culture if Neg
Health Link Test Code: RAPDSC
LIS Test Code: RSTREP
CPT Code(s): 87880
Rapid screening for Group A Streptococci from throat swabs. Culture on adult patients may not be needed. Consider ordering Strep A Screen, Rapid Ag [RAPD] instead.
Days Performed: Daily, 24 hours.
In-Lab Turnaround Time: 4 hours.
Stat In-Lab Turnaround Time: 1 hour.
Specimen: Pharyngeal swab
Collection Container: 2 CultureSwabs®
Use standard specimen collection techniques. Culture swabs can be obtained from UWHC Central Supply. The double swab required for this test is CS item #4005445. If using single swab culturettes (CS item #1220190), please submit two.
Store swabs in tightly capped tube. Transport to laboratory.
Frozen swabs, swabs with calcium alginate or cotton tips or wooden shafts, and specimens greater than 72 hours post collection are not acceptable.
This is a screening test only. A negative result may indicate either that the specimen obtained was negative for the presence of Group A Streptococci or that the amount of antigen extracted from the specimen is less than the analytical sensitivity of the test. The result should be interpreted in conjunction with clinical and other data available to the clinician. All specimens that test negative are sent to the UWHC Microbiology Lab for a Strep Culture.
Culture on adult patients may not be needed. The Infectious Diseases Society of America (IDSA) practice guidelines (2002) state that, because of the reduced sensitivity of rapid antigen tests and the importance of accurate detection, predominantly for prevention of rheumatic heart disease, culture confirmation of negative rapid antigen tests is recommended for pediatric patients.
The risk of infection is apt to be higher for parents of school-aged children and for adults whose occupation brings them into close association with children.