Spectrum of organisms cultured
| Organisms | Perforated ulcers (cases) | Healed ulcers (controls) | ||
|---|---|---|---|---|
| No | % | No | % | |
| Denominators used in percentage calculation were 36 cases and 34 controls with corneal scraping. | ||||
| *Most mixed infections involved Staphylococcus epidermis associated with a single fungal species | ||||
| †Performed on three patients with clinical suspicion. | ||||
| Positive corneal scraping | 21 | 58 | 11 | 33 |
| Mixed* | 3 | 8 | 1 | 3 |
| Bacteria | 18 | 50 | 10 | 29 |
| Staphylococcus epidermis | 9 | 25 | 6 | 18 |
| Staphylococcus aureus | 2 | 6 | 1 | 3 |
| Streptococcus pneumoniae | 0 | 0 | 1 | 3 |
| Alpha haemolytic streptococcus | 1 | 3 | 0 | 0 |
| Pseudomonas spp | 4 | 11 | 0 | 0 |
| Acinetobacter spp | 1 | 3 | 0 | 0 |
| Alkaligenes species | 0 | 0 | 1 | 3 |
| Polybacterial | 1 | 3 | 1 | 3 |
| Fungal | 7 | 19 | 2 | 6 |
| Aspergillus spp | 3 | 8 | 2 | 6 |
| Fusarium spp | 2 | 6 | 0 | 0 |
| Alternaria spp | 1 | 3 | 0 | 0 |
| Curvularia spp | 1 | 3 | 0 | 0 |
| Acanthamoeba† | 0 | 0 | 0 | 0 |