TABLE 6

Numbers of clinically significant isolates by organism type and recognition by both instruments, Virtuo and BTA3D, for volume-compliant and noncompliant groupsa

Organism groupNo. of isolates with indicated volume compliance status
CompliantNoncompliant, ≤10-ml volNoncompliant, >10-ml vol
Significant positivesDetected by both instrumentsbSignificant positivesDetected by both instrumentscSignificant positivesDetected by both instrumentsd
Coagulase-negative staphylococci311712795
Staphylococcus aureus 45311511129
Enterobacteriaceae 665021101410
Yeast862119e10
Nonfermentative Gram-negative bacilli1480052
Anaerobes710011
Streptococcus spp.131011797
Enterococcus spp.29244394
Other420010
Total for all microorganisms21714965397948
  • a A detailed organism listing is shown in Table S1 in the supplemental material.

  • b Rate of detection by both instruments, 68.7% (detection rate differences not statistically significant; see Table 5).

  • c Rate of detection by both instruments, 60.0% (detection rate differences not statistically significant; see Table 5).

  • d Rate of detection by both instruments, 60.8% (detection rate differences not statistically significant; see Table 5).

  • e Significant versus combined volume-compliant and non-volume-noncompliant ≤10-ml-volume groups (P < 0.0001).