TABLE 2.
Sample | Indexa | Interpretation of the test |
---|---|---|
Negative control | 0.167 | NAb |
Threshold control | NA | NA |
Positive control | 3.228 | NA |
0.9% saline | 0.081 | Negative |
0.086 | Negative | |
5% dextrose | 0.067 | Negative |
0.071 | Negative | |
Amoxicillin powder in phosphate buffer | 0.125 | Negative |
0.110 | Negative | |
Piperacillin | 4.901 | Positive |
4.912 | Positive | |
Piperacillin-tazobactam, lot: | ||
A | >5.168c | Positive |
B1 | >5.168 | Positive |
B2 | >5.168 | Positive |
B3 | >5.168 | Positive |
C1 | >5.168 | Positive |
C2 | >5.168 | Positive |
C3 | >5.168 | Positive |
C4 | >5.168 | Positive |
C5 | >5.168 | Positive |
Nafcillin | 0.067 | Negative |
0.069 | Negative | |
Ampicillin-sulbactam | 0.127 | Negative |
0.127 | Negative | |
Cefazolin | 0.047 | Negative |
0.048 | Negative | |
Ceftazidime | 0.048 | Negative |
0.047 | Negative | |
Gentamicin | 0.062 | Negative |
0.062 | Negative | |
Erythromycin | 0.072 | Negative |
0.067 | Negative | |
Levofloxacin | 0.069 | Negative |
0.078 | Negative |
Index values represent the test results for duplicate wells.
NA, not applicable.
The index for piperacillin-tazobactam for each bag in lots A, B, and C was >5.168 for duplicate wells; the value is therefore presented only once per lot. The OD of the piperacillin-tazobactam wells was out of the absorbance range of the plate reader. The index was calculated with an OD value of >3.000.