Table 4.
Results of blood cultures, valve cultures, and PCR samples. Number of patients with each microbe is shown
| Microbe | Blood culture | Valve culture | PCR |
|---|---|---|---|
| Blood culture positive cases (n = 74) | |||
| Staphylococcus aureus | 25a | 6 | 20 |
| Streptococcus viridans groupb | 20 | 2 | 15 |
| Enterococcus faecalis | 9 | 2 | 4 |
| Coagulase negative staphylococcus | 8c | 4d | 4 |
| Streptococcus agalactiae | 4 | 1 | 4 |
| Other beta-hemolytic streptococci | 4e | 0 | 3 |
| Streptococcus pneumoniae | 1 | 0 | 0 |
| Streptococcus bovis | 1 | 1 | 1 |
| Streptococcus anginosus | 1 | 1 | 1 |
| Granulicatella adiacens | 1 | 0 | 1 |
| Aerococcus urinae | 1 | 1 | 1 |
| Blood culture negative cases, but PCR positive (n = 10) | |||
| Bartonella quintana | 0 | 0 | 5 |
| Coxiella burnetii | 0 | 0 | 1 |
| Tropheryma whipplei | 0 | 0 | 1 |
| Streptococcus pneumoniae | 0 | 0 | 1 |
| Streptococcus viridans group | 0 | 1 | 2 |
| IE cases without determined etiology (n = 3) | |||
aIn 2 cases, polymicrobial bacteremia (1 with Bacillus cereus and 1 with Streptococcus agalactiae and in this case Staphylococcus aureus was not considered as causative agent of IE)
bStreptococcus anginosus and Streptococcus bovis are shown separately
c4 Staphylococcus epidermidis, 3 Staphylococcus lugdunensis
d3 concordant with BC (same cases); 1 different case (ruled as contamination in that case)
e3 G group and 1 C group