Table 3.
Antimicrobial susceptibility pattern of gram-negative isolates (decimals are rounded off to the nearest whole number)
| Organisms | Amikacin | Gentamicin | Netilmicin | Tobramycin | Ceftazidime | Cefepime | Cefoperazone–sulbactam | Piperacillin–Tazobactam | Ciprofloxacin | Imipenem | Meropenem | Colistin | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Acinetobacter baumannii (n = 320) | S | 17 (6%) |
32 (10%) |
51 (16%) |
45 (14%) |
9 (3%) |
6 (2%) |
19 (6%) |
29 (9%) |
14 (4%) |
11 (4%) |
11 (4%) |
320 (100%) |
| R | 303 (94%) |
288 (90%) |
269 (84%) |
275 (86%) |
311 (97%) |
314 (98%) |
301 (94%) |
291 (91%) |
306 (96%) |
309 (97%) |
309 (97%) |
0 (00%) |
|
| Pseudomonas aeruginosa (n = 145) | S | 91 (63%) |
88 (61%) |
90 (62%) |
89 (61%) |
85 (59%) |
76 (52%) |
78 (54%) |
91 (63%) |
87 (60%) |
86 (59%) |
82 (57%) |
144 (99%) |
| R | 54 (37%) |
57 (39%) |
55 (38%) |
56 (39%) |
60 (41%) |
69 (48%) |
67 (46%) |
54 (37%) |
58 (40%) |
59 (41%) |
63 (43%) |
1 (1%) |
|
| Klebsiella pneumoniae (n = 137) | S | 76 (55%) |
55 (40%) |
72 (53%) |
NA | 26 (18%) |
40 (29%) |
46 (34%) |
35 (26%) |
36 (26%) |
68 (49%) |
64 (47%) |
136 (99%) |
| R | 61 (45%) |
82 (60%) |
65 (47%) |
NA | 111 (81%) |
97 (71%) |
91 (66%) |
102 (74%) |
101 (74%) |
69 (51%) |
73 (53%) |
1 (1%) |
|
| Enterobacter spp. (n = 35) | S | 18 (55%) |
17 (52%) |
18 (55%) |
14 (42%) |
10 (30%) |
13 (39%) |
15 (45%) |
13 (39%) |
16 (48%) |
19 (58%) |
21 (64%) |
33 (100%) |
| R | 15 (45%) |
16 (48%) |
15 (45%) |
19 (57%) |
23 (70%) |
20 (61%) |
18 (55%) |
20 (61%) |
17 (52%) |
14 (42%) |
12 (36%) |
0 (00%) |
|
| Escherichia coli (n = 49) | S | 28 (57%) |
19 (39%) |
35 (71%) |
3 (6%) |
5 (10%) |
19 (39%) |
20 (41%) |
17 (35%) |
10 (21%) |
37 (76%) |
37 (76%) |
48 (98%) |
| R | 21 (43%) |
30 (61%) |
14 (29%) |
46 (94%) |
44 (90%) |
30 (61%) |
29 (59%) |
32 (65%) |
39 (81%) |
12 (24%) |
12 (24%) |
1 (02%) |
|
| Shewanella putrefaciens (n = 34) | S | 5 (15%) |
5 (15%) |
4 (12%) |
4 (12%) |
4 (12%) |
4 (12%) |
4 (12%) |
4 (12%) |
4 (12%) |
4 (12%) |
4 (12%) |
34 (100%) |
| R | 29 (85%) |
29 (85%) |
30 (88%) |
30 (88%) |
30 (88%) |
30 (88%) |
30 (88%) |
30 (88%) |
30 (88%) |
30 (88%) |
30 (88%) |
0 (00%) |
|
| Non-aeruginosa Pseudomonas spp. (n = 36) | S | 26 (52%) |
24 (48%) |
21 (42%) |
21 (42%) |
15 (30%) |
11 (22%) |
24 (48%) |
21 (42%) |
28 (56%) |
9 (18%) |
10 (20%) |
48 (96%) |
| R | 24 (48%) |
26 (52%) |
29 (58%) |
29 (58%) |
35 (70%) |
39 (78%) |
26 (52%) |
29 (58%) |
22 (44%) |
41 (82%) |
40 (80%) |
2 (04%) |
S, sensitive; R, resistant. Note:The isolates with intermediate susceptibility were considered resistant