Table 5.
Microorganisms isolated according to the type of infection and prosthesis
| Microorganisms | Acute infections | Chronic infections | Total number‡ | ||
|---|---|---|---|---|---|
| Hip | Knee | Hip | Knee | ||
| Gram-positive cocci | |||||
| Coagulase-negative staphylococci (methicillin-resistant) | 11 (5) | 17 (12) | 8 (5) | 12 (10) | 48 (32) |
| Staphylococcus aureus (methicillin-resistant) | 2 (1) | 14 (2) | 2 (1) | 0 | 18 (4) |
| Streptococcus viridans | 0 | 3 | 2 | 1 | 6 |
| Enterococcus faecalis | 1 | 3 | 2 | 1 | 7 |
| Other* | 0 | 3 | 0 | 2 | 5 |
| Gram-negative bacilli | |||||
| Escherichia coli | 0 | 5 | 1 | 1 | 7 |
| Pseudomonas aeruginosa | 1 | 3 | 0 | 0 | 4 |
| Proteus spp | 1 | 2 | 1 | 0 | 4 |
| Enterobacter cloacae | 1 | 1 | 0 | 1 | 3 |
| Other† | 0 | 3 | 1 | 0 | 4 |
| Anaerobes | |||||
| Propionibacterium acnes | 0 | 0 | 2 | 1 | 3 |
| Peptostreptococcus spp | 0 | 0 | 3 | 0 | 3 |
| Yeast | |||||
| Candida albicans | 1 | 0 | 0 | 0 | 1 |
* Staphylococcus saprophyticus, Streptococcus agalactiae, S. equisemilis, S. mitis, and Bacillus spp; †Klebsiella pneumoniae, Serratia marcescens, Stenotrophomonas maltophilia, and Campylobacter spp; ‡the total number of microorganisms was greater than the number of patients because of polymicrobial infections (see Results).