Table 4.

Comparison of PCR with results of tissue or swab culture. For a small patient group (n = 11) results of both methods (PCR amplification and culture of swab or tissue) were exceptionally gained upon special clinical request. The direct comparison is provided in this table; these data were not used for further computation of sensitivity, specificity, and positive and negative predictive values of broad-range PCR.

Result	Culture	PCR
Positive in both methods, concordance on species level n = 5	3 ×  Enterococcus faecalis
	Staphylococcus epidermidis
	Staphylococcus lugdunensis
Positive but discordant  n = 2	Staphylococcus epidermidis	Streptococcus gordonii
	Staphylococcus pasteuri	Streptococcus gallolyticus
Culture positive but PCR amplification negative n = 4	2 ×  Enterococcus faecium	neg
	Staphylococcus aureus	neg
	Coagulase-negative staphylococci	neg