TABLE 2.

Galactomannan assay reactivity with antibiotics tested at full strength or undiluted

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

^aIndex values represent the test results for duplicate wells.

^bNA, not applicable.

^cThe 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.