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Regional variation in the organisms cultured from corneal scrapes
| Staphylococcus | Streptococcus | Pseudomonas | Gram negatives | Fungi | |
| New York, USA | 49% | 9% | 8% | 22% | 3% |
| Florida, USA | 16% | 8% | 19% | 9% | 35% |
| South Africa | 45% | 29% | 4% | 14% | 3% |
| Nepal | 23% | 37% | 11% | 14% | 17% |
| Bangladesh | 2% | 24% | 22% | 5% | 45% |
| Melbourne, Australia | 48% | 13% | 7% | 14% |
