II. Indication
- Suspected Group A Streptococcal Pharyngitis
III. Methods
- Extraction
- Enzyme extraction (more sensitive)
- Acid extraction (faster, usual testing method)
- Identification
- Enzyme immunoassay
- Second generation test
- Usual identification method in the United States
- Optical Immunoassay
- Third generation test with limited use in U.S. due to cost
- Latex Agglutination
- Older, first generation method that has been replaced by enzyme immunoassay in the United States
- Requires skill to interpret
- Enzyme immunoassay
IV. Efficacy
- Test Sensitivity: 80-86%
- Test Specificity: 96-98%