Table 2.
Isolated microorganisms in positive culture
| Pathogens | PJI (n = 75) | FRI (n = 94) | p-value | ||
|---|---|---|---|---|---|
| Gram-positive cocci | 48 (64.0%) | 36 (38.3%) | 0.001 | ||
| 1 Staphylococci | 46 (61.3%) | 30 (31.9%) | 0.000 | ||
| 1.1 Staphylococcus aureus | 22 (29.3%) | 20 (21.3%) | n.s | ||
| 1.1.1 MRSA | 6 (8.0%) | 8 (8.5%) | n.s | ||
| 1.1.2 MSSA | 16 (21.3%) | 12 (12.8%) | n.s | ||
| 1.2 CoNS | 24 (32.0%) | 10 (10.6%) | 0.001 | ||
| 1.2.1 MRCoNS | 20 (26.7%) | 8 (8.5%) | 0.002 | ||
| 6 (8.0%) | MRSE | 5 (5.3%) | MRSE | n.s | |
| 5 (6.7%) | MRSHo | 1 (1.1%) | MRSHo | n.s | |
| 8 (10.7%) | MRSC | 0.001 | |||
| 1 (1.3%) | Staphylococcus warneri | n.s | |||
| 2 (2.1%) | MRSH | n.s | |||
| 1.2.2 MSCoNS | 4 (5.3%) | 2 (2.1%) | n.s | ||
| 4 (5.3%) | MSSE | 1 (1.1%) | MSSE | n.s | |
| 1 (1.1%) | MSSHo | n.s | |||
| 2 Streptococcus dysgalactiae | 0 | 1 (1.1%) | n.s | ||
| 3 Enterococcus spp. | 2 (2.7%) | 5 (5.3%) | n.s | ||
| 2 (2.7%) | Enterococcus faecalis | 3 (3.2%) | Enterococcus faecalis | n.s | |
| 2 (2.1%) | Enterococcus faecium | n.s | |||
| Gram-positive bacilli | 0 | 2 (2.1%) | n.s | ||
| 1 Corynebacterium | 0 | 1 (1.1%) | n.s | ||
| 2 Bacillus cereus | 0 | 1 (1.1%) | n.s | ||
| Gram-negative bacilli | 20 (26.7%) | 53 (56.4%) | 0.000 | ||
| 1 Enterobacteriaceae | 12 (16.0%) | 31 (33.0%) | 0.012 | ||
| 2 (2.7%) | Proteus mirabilis | 3 (3.2%) | Proteus mirabilis | n.s | |
| 6 (8.0%) | Klebsiella pneumoniae | 9 (9.6%) | Klebsiella pneumoniae | n.s | |
| 2 (2.7%) | Escherichia coli | 7 (7.4%) | Escherichia coli | n.s | |
| 2 (2.7%) | Salmonella enteritidis | n.s | |||
| 1 (1.1%) | Klebsiella oxytoca | n.s | |||
| 0 | Enterobacter | 11 (11.7%) | Enterobacter spp. | 0.001 | |
| 9 (9.6%) | Enterobacter cloacae | 0.005 | |||
| 2 (2.1%) | Enterobacter kobei | n.s | |||
| 2 Pseudomonas spp. | 8 (10.7%) | 8 (8.5%) | n.s | ||
| 4 (5.3%) | Pseudomonas aeruginosa | 7 (7.4%) | Pseudomonas aeruginosa | n.s | |
| 2 (2.7%) | Pseudomonas putida | 1 (1.1%) | Pseudomonas putida | n.s | |
| 2 (2.7%) | Pseudomonas mendocina | n.s | |||
| 3 Stenotrophomonas maltophilia | 0 | 3 (3.2%) | n.s | ||
| 4 Acinetobacter baumannii | 0 | 8 (8.5%) | 0.009 | ||
| 5 Serratia marcescens | 0 | 3 (3.2%) | n.s | ||
| Obligate anaerobe | 0 | 2 (2.1%) | n.s | ||
| 1 (1.1%) | Bacteroides fragilis | n.s | |||
| 1 (1.1%) | Prevotella | n.s | |||
| Canidia albicans | 6 (8.0%) | 1 (1.1%) | 0.045 | ||
| Mycobacterium tuberculosis | 1 (1.3%) | 0 | n.s | ||
MRSA Methicillin-resistant S. aureus, MSSA Methicillin-sensitive S. aureus, CoNS Coagulase-negative Staphylococci, MRCoNS Methicillin-resistant CoNS, MRSE Methicillin-resistant S. epidermidis, MRSHo Methicillin-resistant S. hominis, MRSH Methicillin-resistant S. haemolyticus, MRSC Methicillin-resistant S. capitis, MSCoNS Methicillin-sensitive coagulase-negative Staphylococci, MSSE Methicillin-sensitive S. epidermidis, MSSHo Methicillin-sensitive S. hominis