Release of Gentamicin and Vancomycin from Preformed Spacers in Infected Total Hip Arthroplasties: Measurement of Concentrations and Inhibitory Activity in Patients’ Drainage Fluids and Serum

Table 2

Bactericidal titer of drainage fluids collected from 7 patients within the first 24 hours of spacer implantation against multiresistant clinical isolates.

Strain	DBT
	PT 1		PT 2		PT 3		PT 4		PT 5		PT 6		PT 7
	1 h	24 h	1 h	24 h	1 h	24 h	1 h	24 h	1 h	24 h	1 h	24 h	1 h	24 h
S. aureus	6	9	9	9	6	5	5	5	3	2	3	4	6	4
S. epidermidis	3.3	6	5	3	4	4	4	4	0	1	4	4	5	3
S. haemolyticus	3.3	6	6	7	4	3	4	4	0	1	3	3	4	3
S. haemolyticus Methicillin-resistant	3	5	4	3	4	4	4	3	0	0	4	5	4	3
S. epidermidis Methicillin-resistant	3.3	6	4.3	2	4	3	4	4	0	0	7	7	4	3
S. hominis Methicillin-resistant	5	8	7	5	5	5	4	5	0	1	5	5	6	4
E. coli	6	9	5	6	4	4	4	5	2	1	5	3	6	4
P. aeruginosa	4	6	5	5	4	4	3	4	0	0	5	6	5	3