Lab Education
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Review Education Modules
Gaining Efficiencies in Laboratory Workflow
Continuing Education Certification
Amplification Assays

  • Nucleic acid amplification testing (NAAT) is the preferred method for STD testing (CDC guidelines)
  • Nonamplified methods are appropriate in some circumstances
  • Advantages of amplified testing include:
    • Greater sensitivity than alternative approaches
    • Can detect very small quantities of target specimen
  • Disadvantages include:
    • Amplification systems are more difficult to implement due to the risk of cross-contamination, which can result in false-positive results
    • Trace amounts of airborne carryover between samples can be detected by modern amplification systems
    • Amplification assays are also subject to inhibition
      • Inhibition occurs when specific molecules in the specimen (inhibitors) block the activity of enzymes in the reaction mix
      • Inhibition causes false-negative results

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