Table 4.
Antibiotic susceptibility profile of pathogenic bacteria isolated from ear discharges at Dessie Regional Health Research Laboratory from 2001 to 2011.
| Antibiotics | Bacterial isolates | ||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Proteus spp. | S. aureus | Pseudomonas spp. | E. coli | Citrobacter spp. | Enterobacter spp. | Klebsiella spp. | |||||||||||||||
| T t | S% | R% | T t | S% | R% | T t | S% | R% | T t | S% | R% | T t | S% | R% | T t | S% | R% | T t | S% | R% | |
| Amoxicillin | 181 | 21.5 | 78.5 | 94 | 22.3 | 77.7 | 87 | 8.1 | 91.9 | 63 | 22.2 | 77.8 | 24 | 16.7 | 83.3 | 26 | 7.7 | 92.3 | 16 | 12.5 | 87.5 |
| Tetracycline | 237 | 7.7 | 92.3 | 175 | 41.7 | 58.3 | 164 | 23.2 | 76.8 | 158 | 36.1 | 63.9 | 51 | 25.5 | 74.5 | 51 | 27.5 | 72.5 | 24 | 25 | 75 |
| TMP-SMX | 221 | 39.8 | 60.2 | 156 | 70.5 | 29.5 | 100 | 8.0 | 92 | 93 | 73.1 | 26.9 | 38 | 39.5 | 60.5 | 40 | 45.7 | 54.3 | 36 | 27.8 | 72.2 |
| Cephalothin | 54 | 55.5 | 44.5 | 48 | 83.3 | 16.7 | 58 | 34.5 | 65.5 | 26 | 61.5 | 38.5 | 11 | 4/11 | 7/11 | 12 | 5/12 | 7/12 | 4 | 2/4 | 2/4 |
| Ampicillin | 37 | 0.5 | 99.5 | 16 | 18.6 | 81.4 | 14 | 4/14 | 10/14 | 28 | 10.7 | 89.3 | 3 | 1/3 | 2/3 | 3 | 1/3 | 2/3 | 5 | 0 | 5/5 |
| Chloramphenicol | 206 | 25.7 | 74.3 | 151 | 72.2 | 27.8 | 148 | 39.7 | 60.3 | 103 | 62.1 | 37.9 | 42 | 59.5 | 40.5 | 40 | 75.0 | 25 | 8 | 5/8 | 3/8 |
| Ceftriaxone | 967 | 5.0 | 95 | 77 | 63.6 | 36.4 | 110 | 22.7 | 77.3 | 102 | 54.9 | 45.1 | 21 | 57.1 | 42.9 | 25 | 40.0 | 60 | 17 | 23.5 | 76.5 |
| Ciprofloxacin | 114 | 93.0 | 7 | 102 | 99 | 1 | 134 | 90.3 | 9.7 | 69 | 91.3 | 8.7 | 35 | 97.1 | 2.9 | 38 | 97.8 | 2.2 | 9 | 9/9 | 0 |
| Doxycycline | 48 | 14.6 | 85.4 | 63 | 47.6 | 52.4 | 44 | 18.2 | 81.8 | 38 | 31.6 | 68.4 | 4 | 1/4 | 3/4 | 2 | 0/2 | 2/2 | 7 | 1/7 | 6/7 |
| Erythromycin | 136 | 8.1 | 91.9 | 200 | 68.5 | 31.5 | 156 | 15.4 | 84.6 | 87 | 17.2 | 82.8 | 6 | 1/6 | 5/6 | 39 | 15.4 | 84.6 | 10 | 2/10 | 8/10 |
| Gentamicin | 284 | 81.0 | 19 | 241 | 85.9 | 14.1 | 204 | 75.5 | 24.5 | 128 | 87.5 | 12.5 | 52 | 98.1 | 1.9 | 46 | 82.6 | 17.4 | 29 | 79.3 | 20.7 |
| Cefotaxime | 155 | 23.9 | 76.1 | 75 | 46.7 | 53.3 | 53 | 26.4 | 73.6 | 65 | 64.6 | 35.4 | 18 | 38.9 | 61.1 | 13 | 8/13 | 5/13 | 17 | 47.1 | 52.9 |
| Kanamycin | 51 | 56.9 | 43.1 | 23 | 78.3 | 21.7 | 13 | 3/13 | 10/13 | 30 | 70 | 30 | 6 | 3/6 | 3/6 | 5 | 4/5 | 1/5 | 1 | 1/1 | 0 |
| Nitrofurantoin | 37 | 70.2 | 29.8 | 40 | 87.5 | 12.5 | 11 | 11/11 | 0 | 14 | 9/14 | 5/14 | — | — | — | — | — | — | 5 | 3/5 | 2/5 |
| Vancomycin | 16 | 18.8 | 81.2 | 77 | 58.4 | 41.6 | 20 | 0 | 100 | 5 | 0 | 5/5 | 2 | 0 | 2/2 | — | — | — | — | — | — |
| Carbenicillin | 32 | 62.6 | 37.4 | 2 | 0 | 2/2 | — | — | — | 10 | 6/10 | 4/110 | 2 | 1/2 | 1/2 | — | — | — | 3 | 0 | 3/3 |
| Clindamycin | 33 | 78.8 | 21.2 | 50 | 74 | 26 | 21 | 47.6 | 52.4 | 16 | 81.3 | 18.7 | 2 | 1/2 | 1/2 | 1 | 0 | 1/1 | 1 | 1/1 | 0 |
∗ TMP-SMX: trimethoprim-sulfamethoxazole; T t: number of total tests; S%: percent of sensitivity; R%: percent of resistance; for those samples ≤15, percentage of susceptibility indicated by fractional numbers: S% = number of total sensitive/number of total tests (T s/T t) and R% = number of total resistance/number of total tests (T R/T t).