TABLE 1.
Distribution of resistance to individual antimicrobial agents among sources and Salmonella enterica serotypes
| Antimicrobial agent or drug resistance category | Distribution of resistance to antimicrobial agent among: |
|||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| All isolates |
Bovine isolates |
Human isolates |
Serotype Newport isolatesa |
Serotype Typhimurium isolatesa |
||||||
| No. of isolatesb | % of isolates (95% CI)c | No. of isolates | % of isolates (95% CI) | No. of isolates | % of isolates (95% CI) | No. of isolates | % of isolates (95% CI) | No. of isolates | % of isolates (95% CI) | |
| Antimicrobial agents | ||||||||||
| Triple-sulfad | 288 | 79 (74-83) | 143 | 88 (83-93) | 145 | 71 (65-78) | 137 | 88 (83-93) | 139 | 76 (70-83) |
| Tetracycline | 238 | 65 (60-70) | 139 | 85 (80-91) | 99 | 49 (42-56) | 122 | 78 (72-85) | 111 | 61 (54-68) |
| Ampicillin | 233 | 64 (59-69) | 142 | 87 (82-92) | 91 | 45 (38-52) | 120 | 77 (70-84) | 106 | 58 (51-65) |
| Streptomycin | 229 | 63 (58-68) | 128 | 79 (72-85) | 101 | 50 (43-57) | 121 | 78 (71-84) | 100 | 55 (48-62) |
| Chloramphenicol | 187 | 51 (46-56) | 110 | 67 (60-75) | 77 | 38 (31-45) | 98 | 63 (55-70) | 83 | 46 (38-53) |
| Ceftazidime | 153 | 42 (37-47) | 104 | 64 (56-71) | 49 | 24 (18-30) | 106 | 68 (61-75) | 46 | 25 (19-32) |
| Amoxicillin-clavulanic acid | 119 | 33 (28-37) | 86 | 53 (45-60) | 33 | 16 (11-21) | 79 | 51 (43-58) | 34 | 19 (13-24) |
| Kanamycin | 82 | 22 (18-27) | 53 | 33 (25-40) | 29 | 14 (9-19) | 19 | 12 (7-17) | 62 | 34 (27-41) |
| Sulfoxazole-trimethoprim | 43 | 12 (8-15) | 21 | 13 (8-18) | 22 | 11 (7-15) | 13 | 8 (4-13) | 30 | 16 (11-22) |
| Gentamicin | 8 | 0 | 8 | 1 | 5 | |||||
| Nalidixic acid | 4 | 0 | 4 | 2 | 2 | |||||
| Drug resistance category | ||||||||||
| Pansusceptible | 74 | 20 (16-25) | 20 | 12 (8-17) | 54 | 27 (21-33) | 19 | 12 (7-17) | 39 | 21 (16-28) |
| Intermediate resistance | 54 | 15 (11-18) | 4 | 3 (0-5) | 50 | 25 (19-31) | 15 | 10 (5-14) | 35 | 19 (14-25) |
| Multidrug resistant | 238 | 65 (60-70) | 139 | 85 (80-91) | 99 | 49 (42-56) | 122 | 78 (72-85) | 108 | 59 (52-67) |
a
Data for Salmonella serotype 4,5,12:i:− isolates not shown.
b
Number of isolates showing resistance to the specific antimicrobial drug out of 366 isolates included in the reduced data set.
c
Percentage of isolates resistant to the specific antimicrobial drug. The 95% binominal confidence interval (95% CI) based on normal approximation is shown in parentheses.
d
Triple-sulfa is sulfadiazine, sulfamethazine, and sulfamerazine.