TABLE 5.

Overall C. pneumoniae positivity rates for endarterectomy samples (panel 3) and negative controls reported by each laboratory (laboratories A to D) by the origin of the DNA extracts tested and the DNA extraction protocol used

Labora- toryTotal no. of positivea analysesNo. of positiveb atheromasNo. of false- positives analysescNo. of positive analyses (origind of extracts)DNA extraction method or protocol used
AtheromaNegative controlsc
A4311 (C)BM
2 (C)1 (C)K
B1613311 (C)2 (C)BM
2 (C)1 (C)K
C171161 (A)1 (A)BM
1 (B)1 (B)BM
2 (C)2 (C)BM
1 (D)1 (D)BM
2 (A)1 (A)Q
2 (B)Q
2 (C)K
D15691 (A)1 (A)BM
4 (C)3 (C)BM
3 (A)Q
1 (C)Q
1 (D)Q
1 (C)K
  • a Number of samples reported as C. pneumoniae DNA positive of a total of 960 analyses.

  • b Number of endatherectomy specimens reported as C. pneumoniae DNA positive of a total of 720 analyses.

  • c Porcine aortic tissue samples (negative controls) reported as C. pneumoniae DNA positive of a total of 240 analyses.

  • d DNA was extracted at laboratory A, B, C, or D.