Table 1. List of different error types for unqualified samples listed by different molecular techniques in the six rounds of proficiency testing plans.
|
Diagnostic
tool |
NTM | MTB | DST | subtotal | |||||||||
| Identification error | False positive | False negative | Failure | False RFP susceptible | False RFP resistance | RFP susceptibility test failure | False INH susceptible | False INH resistance | INH susceptibility test failure | ||||
| Note: The NA is the abbreviation of not available.
Abbreviations: MTB=mycobacterium tuberculosis; NTM=nontuberculosis mycobacteria; PCR=polymerase chain reaction; DST=drug susceptibility test; RFP=rifampicin; INH=isoniazid. | |||||||||||||
| Loopamp | 1 | 3 | 0 | 0 | NA | NA | NA | NA | NA | NA | 4 | ||
| EasyNAT | 0 | 2 | 50 | 0 | NA | NA | NA | NA | NA | NA | 52 | ||
| DeFast.TB | 3 | 6 | 16 | 0 | NA | NA | NA | NA | NA | NA | 25 | ||
| Real time PCR | 2 | 3 | 2 | 0 | NA | NA | NA | NA | NA | NA | 7 | ||
| Xpert MTB/RIF | 0 | 5 | 4 | 25 | 6 | 1 | 1 | NA | NA | NA | 42 | ||
| GenoType MTBDRplus | 0 | 0 | 1 | 0 | 0 | 1 | 0 | 0 | 3 | 0 | 5 | ||
| GeneChip MDR TB | 1 | 0 | 2 | 0 | 0 | 0 | 4 | 0 | 0 | 4 | 11 | ||
| MeltPro TB | 0 | 0 | 0 | 0 | 0 | 2 | 1 | 1 | 3 | 0 | 7 | ||
| Total | 7 | 19 | 75 | 25 | 6 | 4 | 6 | 1 | 6 | 4 | 153 | ||