Table 10.
Frequency results of 52 E. coli isolate antibiograms from slaughterhouses A and B located in the Federal District region, using the disk-diffusion method and interpreted, according to CLSI parameters [34], as resistant I, intermediate (I), or sensitive (S).
| Antimicrobial | Number of Resistant Isolates (%) | Number of Intermediate Resistance Isolates (%) |
Number of Sensitive Isolates (%) | Total of Resistant and Intermediate Isolates (%) |
|---|---|---|---|---|
| Nalidixic acid (NAL) |
73% (38/52) |
9.6% (5/52) |
17.4% (9/52) |
82.6% (43/52) |
| Amoxicillin (AMO) |
88.4% (46/52) |
0% (0/0) |
11.6% (6/52) |
88.4% (46/52) |
| Ampicillin (AMP) |
88.4% (46/52) |
0% (0/0) |
11.6% (6/52) |
88.4% (46/52) |
| Cefazolin (CFZ) |
9.6% (5/52) |
51.9% (27/52) |
38.5% (20/52) |
61.5% (32/52) |
| Ceftazidime (CAZ) |
7.6% (4/52) |
2% (1/52) |
90.4% (47/52) |
9.6% (5/52) |
| Ciprofloxacin (CIP) |
25% (13/52) |
17.3% (9/52) |
57.7% (30/52) |
42.3% (22/52) |
| Chloramphenicol (CLO) |
82.6% (43/52) |
2% (1/52) |
15.4% (8/52) |
84.6% (44/52) |
| Doxycycline (DOX) |
53.7% (28/52) |
4% (2/52) |
42.3% (22/52) |
57.7% (30/52) |
| Streptomycin (EST) |
80.7% (42/52) |
7.7% (4/52) |
11.6% (6/52) |
88.4% (46/52) |
| Erythromycin (ERI) |
71.1% (37/52) |
0% (0/0) |
28.9% (15/52) |
71.1% (37/52) |
| Gentamicin (GEN) |
13.5% (7/52) |
0% (0/0) |
86.5% (45/52) |
13.5% (7/52) |
| Tetracycline (TET) |
53.7% (28/52) |
0% (0/0) |
46.3% (24/52) |
53.7% (28/52) |
| Sulfonamide (SUL) |
84.6% (44/52) |
0% (0/0) |
15.4% (8/52) |
84.6% (44/52) |