Table 3

Interassay and intra-assay reproducibility of NT-MAA

SpecimenDilutionsRPRa NT-MAA
Intra-assayInterassay
No of test repeatsNo of assay repeats
1234567891012345
BS1505/RPR reactive specimenNeat (1:1)RRRRRRRRRRRRRRRR
1:2RRRRRRRRRRRRRRRR
1:4RRRRRRRRRRRRRRRR
1:8RRRRRRRRRRRRRRRR
1:16RRRRRRRRRRRRRRRR
1:32RRRRRRRRRRRRRRRR
1:64RmRm>RmRmRmRmRmRm>RmRmRmRmRmRmRmRm
1:128NNNNNNNNNNNNNNNN
1:256NNNNNNNNNNNNNNNN
1:512NNNNNNNNNNNNNNNN
RPR N controlNeat (1:1)NNNNNNNNNNNNNNNN
  • N, non-reactive; NT-MAA, non-treponemal magnetic particle-based agglutination assay; R, reactive; Rm, minimal reactivity; >Rm, slightly more reactivity than minimal reactive; RPRa, rapid plasma reagin (semiquantitative).