Table 2

Bacteriological findings

Patient No		Vancomycinl levels (μg/ml)		Gentamicin levels (μg/ml)		Time between drug administration and measurement (hours)		Gram stain first biopsy		Bacterial culture
Patient No		Vancomycinl levels (μg/ml)		Gentamicin levels (μg/ml)		Time between drug administration and measurement (hours)		Gram stain first biopsy		First biopsy	Second biopsy
1	2.6	0.9	63	Gram positive cocci	S epidermidis	Sterile
2	12.0	1.4	66	No micro-organisms	Sterile	Sterile
3	10.8	—	68	Gram positive cocci	S epidermidis	Sterile
4	18.0	3.3	68	No micro-organisms	S epidermidis	Sterile
5	8.2	1.0	69	No micro-organisms	Streptococcus sanguis	Sterile
6	12.0	1.2	69	Gram positive cocci	S epidermidis	Sterile
7	15.5	—	71	No micro-organisms	Sterile	Sterile
8	6.3	1.9	71	Gram positive cocci	S epidermidis	Sterile
9	9.0	1.4	71	No micro-organisms	Sterile	Sterile
10	13.3	1.8	71	No micro-organisms	S epidermidis	Sterile
11	8.9	1.4	72	No micro-organisms	S epidermidis	Sterile
12	6.8	1.0	72	No micro-organisms	Sterile	Sterile
13	10.1	2.4	72	No micro-organisms	Sterile	Sterile
14	5.8	1.2	90	No micro-organisms	S aureus	Sterile
15	3.1	—	90	Gram positive cocci	Streptococcus mitis	Sterile
16	16.6	2.6	92	Gram positive cocci	S epidermidis	Sterile
17	4.6	—	93	No micro-organisms	Sterile	Sterile