Table 3.
TI of different classes of antimicrobial drugs used on household and small-scale chicken farms in Tien Giang province, Vietnam (n = 208)
| Class of antimicrobial druga | Name of antimicrobial drug | No. of farms using antimicrobial | Mean TI | Standard deviation |
|---|---|---|---|---|
| Tetracyclines | doxycycline, oxytetracycline, tetracycline | 52 | 90.8 | 608.9 |
| Macrolides | tylosin, tilmicosin, erythromycin, spiramycin | 40 | 73.3 | 582.0 |
| Polymyxins | colistin | 39 | 51.3 | 234.2 |
| Penicillins | ampicillin, amoxicillin | 33 | 52.1 | 383.1 |
| Quinolones | flumequine, oxolinic acid, norfloxacin, enrofloxacin | 19 | 44.3 | 304.9 |
| Aminoglycosides | neomycin, gentamicin, apramycin, streptomycin | 15 | 8.0 | 40.7 |
| Amphenicols | florfenicol, thiamphenicol | 13 | 6.4 | 54.2 |
| Sulphonamides | sulfamethoxazole, sulfadimidine, sulfadimethoxine, sulfamerazine | 10 | 15.5 | 140.6 |
| Lincosamides | lincomycin | 4 | 8.5 | 81.9 |
| Spectinomycin | spectinomycin | 4 | 10.0 | 85.0 |
| Trimethoprim | trimethoprim | 2 | 0.3 | 2.9 |
| Pleuromutilins | tiamulin | 1 | 0.1 | 1.0 |
| All classes | all antimicrobials | 121 | 370.6 | 1447.4 |
aClasses were based on ATCvet classification.