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Table 1 Antimicrobial susceptibility of Thai Streptococcus suis

From: Antimicrobial susceptibility of Streptococcus suis isolated from diseased pigs, asymptomatic pigs, and human patients in Thailand

Antibiotic drugs Thai-isolated S.suis (262 strains)
Susceptible Intermediate Resistant
Ampicillin (AMP) 192 (73.3%) 25 (9.5%) 45 (17.2%)
Cephalexin (CFL) 165 (63.0%) 5 (1.9%) 92 (35.1%)
Cefotaxime (CTX) 244 (93.1%) 4 (1.5%) 14 (5.3%)
Ceftiofur (CTF) 248 (94.7%) 5 (1.9%) 9 (3.4%)
Penicillin G (PEN) 119 (45.4%) 87 (33.2%) 56 (21.4%)
Vancomycin (VAN) 253 (96.6%) 5 (1.9%) 4 (1.5%)
Azithromycin (AZM) 40 (15.3%) 4 (1.5%) 218 (83.2%)
Chloramphenicol (CHL) 229 (87.4%) 17 (6.5%) 16 (6.1%)
Clindamycin (CLI) 17 (6.5%) 0 (0%) 245 (93.5%)
Doxycycline (DOX) 24 (9.2%) 5 (1.9%) 233 (88.9%)
Erythromycin (ERY) 43 (16.4%) 7 (2.7%) 212 (80.9%)
Florfenicol (FFC) 242 (92.4%) 2 (0.8%) 18 (6.8%)
Gentamicin (GEN) 100 (38.2%) 61 (23.3%) 101 (38.5%)
Tetracycline (TET) 13 (5.0%) 7 (2.7%) 242 (92.4%)
Tiamulin (TIA) 6 (2.3%) 45 (17.2%) 211 (80.5%)
Ciprofloxacin (CIP) 155 (59.2%) 36 (13.7%) 71 (27.1%)
Enrofloxacin (ENR) 143 (54.6%) 56 (21.4%) 63 (24.0%)
Norfloxacin (NOR) 65 (24.8%) 73 (27.9%) 124 (47.3%)
Levofloxacin (LEV) 202 (77.1%) 6 (2.3%) 54 (20.6%)
sulfamethoxazole /Trimethoprim (SXT) 95 (36.3%) 10 (3.8%) 157 (59.9%)
  1. The antimicrobial susceptibility of 262 Thai S. suis isolated strains was determined using 20 antibiotic drugs with different modes of inhibition, including beta-lactams (ampicillin, cephalexin, cefotaxime, ceftiofur, penicillin G), glycopeptide (vancomycin), aminoglycoside (gentamicin), tetracyclines (doxycycline, tetracycline), amphenicols (chloramphenicol, florfenicol), pleuromutilin (tiamulin), macrolides (azithromycin, erythromycin), lincosamide (clindamycin), fluoroquinolones (ciprofloxacin, enrofloxacin, levofloxacin), quinolone (norfloxacin), and folate inhibitors (sulfamethoxazole/trimethoprim). S: susceptible; I: intermediate; R: resistant