Bacterial isolates 1984–99
| Organism | Number | Percentage |
| Staphylococcus spp | 439 | 33.4 |
| Pseudomonas spp | 326 | 24.8 |
| Streptococcus spp | 250 | 19.0 |
| Moraxella spp | 77 | 5.9 |
| Serratia spp | 40 | 3.0 |
| Haemophilus spp | 29 | 2.2 |
| Enterobacter spp | 27 | 2.1 |
| Branhamella spp | 17 | 1.3 |
| Diphtheroid spp | 17 | 1.3 |
| Coliforms (non-speciated) | 17 | 1.3 |
| Gram −ve (non-speciated) | 15 | 1.1 |
| Bacillusspp | 15 | 1.1 |
| Corynebacteriumspp | 9 | 0.7 |
| Proteus spp | 9 | 0.7 |
| Escherichia coli | 8 | 0.6 |
| Citrobacter spp | 5 | 0.4 |
| Klebsiella spp | 5 | 0.4 |
| Acinetobacter spp | 4 | 0.3 |
| Nocardia spp | 2 | 0.2 |
| Propionibacterium spp | 2 | 0.2 |
| Alcaligenes spp | 1 | 0.1 |