Table 4. Antimicrobial resistance of S. aureus isolates against 17 different antimicrobial agents.
| Antimicrobial agent (abbreviation) | No. of resistant isolates (%) | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Domestic | Imported | Total (n=777) | |||||||
| Beef (n=96) | Pork (n=101) | Chicken (n=219) | Subtotal (n=416) | Beef (n=112) | Pork (n=165) | Chicken (n=84) | Subtotal (n=361) | ||
| Gentamicin (GEN) | 2 (2.1) |
10 (9.9) |
13 (5.9)** |
25 (6.0)** |
2 (1.8) |
6 (3.6) |
0 (0.0)** |
8 (2.2)** |
33 (4.2) |
| Kanamycin (KAM) | 5 (5.2)* |
20 (19.8)** |
30 (13.7) |
55 (13.2)** |
7 (6.3) |
11 (6.7)** |
6 (7.1) |
24 (6.6)** |
79 (10.2) |
| Rifampin (RIF) | 0 (0.0) |
0 (0.0) |
0 (0.0) |
0 (0.0) |
0 (0.0) |
0 (0.0) |
0 (0.0) |
0 (0.0) |
0 (0.0) |
| Penicillin (PEN) | 75 (78.1)** |
81 (80.2)** |
103 (47.0)*,** |
259 (62.3)** |
60 (53.6)** |
94 (57.0)** |
28 (33.3)*,** |
182 (50.4)** |
441 (56.8) |
| Cefoxitin (FOX) | 4 (4.2) |
8 (7.9) |
18 (8.2) |
30 (7.2) |
10 (8.9) |
21 (12.7) |
3 (3.6) |
34 (9.4) |
64 (8.2) |
| Ciprofloxacin (CIP) | 1 (1.0)* |
21 (20.8)** |
57 (26.0)** |
79 (19.0)** |
3 (2.7) |
12 (7.3)** |
3 (3.6)** |
18 (5.0)** |
97 (12.5) |
| Vancomycin (VAN) | 0 (0.0) |
0 (0.0) |
0 (0.0) |
0 (0.0) |
0 (0.0) |
0 (0.0) |
0 (0.0) |
0 (0.0) |
0 (0.0) |
| Erythromycin (ERY) | 10 (10.4)* |
23 (22.8) |
70 (32.0) |
103 (24.8) |
24 (21.4) |
31 (18.8) |
28 (33.3)* |
83 (23.0) |
186 (23.9) |
| Linezolid (LNZ) | 0 (0.0) |
0 (0.0) |
0 (0.0) |
0 (0.0) |
0 (0.0) |
0 (0.0) |
0 (0.0) |
0 (0.0) |
0 (0.0) |
| Sulfamethoxazole (SMX) | 3 (3.1)** |
5 (5.0) |
9 (4.1) |
17 (4.1)** |
14 (12.5)** |
15 (9.1) |
3 (3.6) |
32 (8.9)** |
49 (6.3) |
| Trimethoprim (TMP) | 2 (2.1) |
19 (18.8)*,** | 5 (2.3) |
26 (6.3) |
3 (2.7) |
9 (5.5)** |
2 (2.4) |
14 (3.9) |
40 (5.1) |
| Clindamycin (CLI) | 2 (2.1)* |
24 (23.8) |
35 (16.0) |
61 (14.7) |
3 (2.7)* |
28 (17.0) |
22 (26.2) |
53 (14.7) |
114 (14.7) |
| Chloramphenicol (CHL) | 7 (7.3) |
26 (25.7)*,** |
7 (3.2) |
40 (9.6)** |
2 (1.8) |
9 (5.5)** |
6 (7.1) |
17 (4.7)** |
57 (7.3) |
| Mupirocin (MUP) | 1 (1.0) |
0 (0.0) |
0 (0.0) |
1 (0.2)** |
7 (6.3) |
3 (1.8) |
1 (1.2) |
11 (3.0)** |
12 (1.5) |
| Quinupristin/dalfopristin (SYN) | 1 (1.0) |
12 (11.9)* |
1 (0.5) |
14 (3.4) |
1 (0.9) |
9 (5.5) |
3 (3.6) |
13 (3.6) |
27 (3.5) |
| Tetracycline (TET) | 2 (2.1)*,** |
40 (39.6) |
74 (33.8)** |
116 (27.9) |
17 (15.2)** |
66 (40.0)* |
14 (16.7)** |
97 (26.9) |
213 (27.4) |
| Fusidate (FUS) | 19 (19.8) |
19 (18.8) |
9 (4.1)* |
47 (11.3) |
11 (9.8) |
16 (9.7) |
3 (3.6) |
30 (8.3) |
77 (9.9) |
*
p<0.05, difference between the proportions of meat category by Chi-squared test.
**
p<0.05, difference between the proportions of domestic and imported meat by Chi-squared test.