Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Specimen Failure Rates
| Sample source | Extraction method | T4 failure |
|---|---|---|
| CSF | MagNAPure Compact | 5* of 169 (<3%) |
| CSF | BioRobot M48 | 0 of 36 |
| Serum | MagNAPure Compact | 0 of 18 |
| Stool | Manual QIAGEN | 3† of 67 (4.4%) |
Repeated successful extraction and testing of one specimen revealed the initial T4 failure was due to extraction failure.
Nucleic acids were diluted 1:10 and retested; T4 bacteriophage result was positive, demonstrating that failure was due to the presence of PCR inhibitors.
