Organisms isolated in bacterial corneal ulcers. Polybacterial infection was noted in 6 cases
| Bacteria | Contact lens wearer | Ocular surface disease | Traumas | Surgery | No risk factor | Total |
|---|---|---|---|---|---|---|
| Gram positive cocci | ||||||
| Staphylococcus aureus | 2 | 6 | 4 | 1 | 3 | 16 |
| Coagulase negative staphylococcus | 47 | 21 | 16 | 5 | 11 | 100 |
| Streptococcus pneumoniae | 1 | 1 | 4 | 0 | 1 | 7 |
| Other streptococcus spp | 0 | 6 | 3 | 2 | 1 | 12 |
| Subtotal | 50 (52.6%) | 34 (73.9%) | 27 (84.3%) | 8 (88.9%) | 16 (64%) | 135 (65.2%) |
| Gram negative cocci | ||||||
| Moraxella spp | 0 (0%) | 1 (0.3%) | 0 (0%) | 0 (0%) | 0 (0%) | 1 (0.3%) |
| Gram positive bacilli | ||||||
| Corynebacterium spp | 1 | 2 | 1 | 0 | 1 | 5 |
| Propionibacterium acnes | 14 | 6 | 4 | 1 | 6 | 31 |
| Actinomyces | 1 | 0 | 0 | 0 | 0 | 1 |
| Subtotal | 16 (16.8%) | 8 (17.4%) | 5 (15.6%) | 1 (11.1%) | 7 (28%) | 37 (17.9%) |
| Gram negative bacilli | ||||||
| Pseudomonas aeruginosa | 18 | 2 | 0 | 0 | 1 | 21 |
| Proteus spp | 0 | 1 | 0 | 0 | 1 | 2 |
| Klebsiella spp | 0 | 0 | 0 | 0 | 0 | 0 |
| Serratia spp | 11 | 0 | 0 | 0 | 0 | 11 |
| Subtotal | 29 (30.5%) | 3 (6.5%) | 0 (0%) | 0 (0%) | 2 (8%) | 34 (16.4%) |
| Positive corneal scraping | 150 | 62 | 47 | 10 | 37 | 306 |