The ratio of invasive to cytotoxic strains with 95%
confidence intervals (CI) was 0.83 (CI, 0.42– 0.99) for conjunctival
microflora isolates, 0.80 (CI, 0.54 – 0.94) for ocular infection
isolates, and 1.0 (CI, 0.45–1.0) for strains isolated postresolution
of keratitis.