Table 4: Frequent bacterial isolates and percentage of strains susceptible to antibacterial agents in bacterial keratitis at a tertiary eye care facility in India (2005–2012).

Organism (number of isolates)Antibacterial agents
AK
n (%)
C
n (%)
CF
n (%)
G
n (%)
GF
n (%)
MO*  
n (%)
OF
n (%)
TB
n (%)

Staphylococcus epidermidis (534)477 (89.3)429 (80.3)376 (70.4)436 (81.6)501 (93.8)3121 (69.6)430 (80.5)426 (79.8)
Staphylococcus aureus (235)224 (95.3)199 (84.7)180 (76.6)199 (84.7)230 (97.9)1632 (73.4)195 (83.0)203 (86.4)
Streptococcus pneumoniae (140)53 (37.8)115 (82.1)106 (75.7)43 (30.7)133 (95)773 (86.5)121 (86.4)60 (42.8)
Bacillus spp. (63)59 (93.6)57 (90.5)47 (74.6)58 (92.0)61 (96.8)224 (75.9)62 (98.4)59 (93.6)
Pseudomonas aeruginosa (117)105 (89.7)47 (40.2)97 (82.9)105 (89.7)86 (73.5)655 (82.3)86 (73.5)86 (73.5)
Acinetobacter sp. (56)52 (92.8)46 (82.14)48 (85.7)50 (89.28)52 (92.8)356 (92.1)43 (76.8)43 (76.8)

Due to unavailability of moxifloxacin discs in the year 2005, the total numbers of isolates tested against moxifloxacin are different from the numbers of isolates tested against other antibiotics. Hence, the total number of isolates tested for moxifloxacin = 1448; 2222; 389; 429; 579; and 638.
n: number of isolates susceptible to the antibiotic. %: corresponding per cent.
AK: amikacin; C: chloramphenicol; CF: ciprofloxacin; G: gentamicin; GF: gatifloxacin; OF: ofloxacin; MO: moxifloxacin; and TB: tobramycin.