Summary of antibiotic susceptibility of the four most common microorganisms of IK in Nottingham, UK, during 2007–2019
| Antibiotics | P. aeruginosa | S. aureus | Streptococci spp | CoNS |
| n (%) | n (%) | n (%) | n (%) | |
| Penicillin* | 0/1 (0.0%) | 89/90 (98.9) | 68/71 (95.8) | 61/73 (83.6) |
| Cefuroxime | – | 17/17 (100.0) | 4/4 (100.0) | – |
| Gentamicin† | 133/134 (99.3) | 90/90 (100.0) | 4/4 (100.0) | 68/73 (93.2) |
| Amikacin† | 133/133 (100.0) | 2/2 (100.0) | – | – |
| Ciprofloxacin‡ | 133/134 (99.3) | 82/90 (91.1) | – | 66/73 (90.4) |
| Levofloxacin‡ | 6/6 (100.0) | – | 39/39 (100.0) | – |
The percentage shown refers to the antibiotic susceptibility rate of each microorganisms. Rate of resistance is equivalent to 100% minus the antibiotic susceptibility rate.
*Penicillin group includes penicillin, amoxicillin and flucloxacillin.
†Gentamicin and amikacin are aminoglycosides and usually one or the other was tested.
‡Ciprofloxacin and levofloxacin are fluoroquinolone and usually one or the other was tested.
CoNS, coagulase-negative staphylococcus; IK, infectious keratitis.