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Table 2 Drug susceptibility of the isolated bacteria

From: Isolation and characteristics of multi-drug resistant Streptococcus porcinus from the vaginal secretions of sow with endometritis

AntibioticsDrug contents (μg/piece)Criteria for inhibition zone (mm)Measured inhibition zone (mm)Results
Resistance (R)aIntermediate (I)bSensitivity
(S)c
β- lactams
 Ampicillin10≤1819–25≥2619.87 ± 0.23I
 Penicillin G10 IU≤1920–27≥2828.10 ± 0.17S
 Amoxicillin20≤1314–17≥180R
 Cephalothin30≤1415–17≥1825.03 ± 0.06S
 Cefazolin30≤1415–17≥1824.00 ± 0.10S
 Cephradine30≤1415–17≥1829.10 ± 0.17S
 Cefuroxime30≤1415–22≥2327.00S
 Cefotaxime30≤2526–27≥280R
 Ceftriaxone30≤2526–27≥2826.07 ± 0.12I
Aminoglycosides
 Amikacin30≤1415–16≥170R
 Streptomycin10≤1112–14≥150R
 Kanamycin30≤1314–17≥180R
Macrolides
 Erythromycin15≤1314–22≥230R
 Roxithromycin15≤1314–22≥230R
 Acetylspramycin30≤1314–22≥230R
Tetracyclines
 Tetracycline30≤1819–22≥232.93 ± 0.06R
 Minocycline30≤1415–18≥198.90 ± 0.17R
 Doxycycline30≤1213–15≥162.00R
Quinolones
 Ofloxacin5≤1213–15≥160R
 Ciprofloxacin5≤1516–20≥210R
 Norfloxacin10≤1213–16≥170R
 Enrofloxacin10≤1213–16≥170R
Lincomycin2≤1415–20≥2110.97 ± 0.06R
Macrodantin300≤1415–16≥170R
Rifampicin5≤1617–18≥1917.67 ± 0.58I
  1. aResistance; b Intermediate; c Sensitivity
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