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Table 2 Antimicrobial resistance patterns, biofilm forming ability and virulence genes expression levels in S. agalactiae isolated from clinical bovine mastitis

From: Antimicrobial and antibiofilm potentials of cinnamon oil and silver nanoparticles against Streptococcus agalactiae isolated from bovine mastitis: new avenues for countering resistance

Isolate No Antimicrobial resistance pattern Biofilm formation Virulence genes relative expressionb Accession No.
OD570a Degree hyl cylE sip scpB rip lmb
1 P, AX, CX, CRO, CL, FEP, S, DA, TE, E, CFP 0.498 Weak 1.16 1.09 1.20 1.50 MW133069
2 P, AX, CX, CRO, CL, FEP, S, DA, TE, E, AMC 0.492 Weak 1.15 1.12 1.21 1.53 MW133070
3 P, AX, CX, CRO, CL, FEP, S, DA, TE, E, AMC 1.121 Strong 1.10 1.04 1.14 1.42 MW133071
4 P, AX, CX, CRO, CL, FEP, S, DA, TE, E, CFP, SXT, AMC 0.514 Weak 1.14 1.07 1.16 1.43 MW133072
5 P, AX, CX, CRO, CL, FEP, S, DA, TE, E, CFP, SXT 0.508 Weak 1.13 1.04 1.15 1.45 MW133073
6 P, AX, CX, CRO, CL, FEP, S, DA, TE, E, AMC 0.484 Weak 1.16 0.97 1.15 1.46 MW133074
7 P, AX, CX, CRO, CL, FEP, S, DA, TE, E, AMC 0.812 Moderate 1.13 1.05 1.23 1.47 MW133075
8 P, AX, CX, CRO, CL, FEP, S, DA, TE, E, CFP 0.494 Weak 1.37 1.05 1.44 1.81 MW133076
9 P, AX, CX, CRO, CL, FEP, S, DA, TE, E, AMC 0.492 Weak 1.14 1.13 1.22 1.53 MW133077
10 P, AX, CX, CRO, CL, FEP, S, DA, TE, E, AMC 1.118 Strong 1.11 1.04 1.04 1.43 MW133078
11 P, AX, CX, CRO, CL, FEP, S, DA, TE, E, CFP, SXT, AMC 0.434 Weak 1.14 1.07 1.14 1.43 MW133079
12 P, AX, CX, CRO, CL, FEP, S, DA, TE, E, CFP, SXT 0.528 Weak 1.13 1.04 1.16 1.46 MW133080
13 P, AX, CX, CRO, CL, FEP, S, DA, TE, E 0.470 Weak 1.14 1.03 1.06 1.45 MW133081
14 P, AX, CX, CRO, CL, FEP, S, DA, TE, E 0.820 Moderate 1.14 1.06 1.15 1.48 MW133082
  1. P penicillin G, AX amoxicillin, CX cloxacillin, CRO ceftriaxone, CL cephalexin, FEP cefepime, S streptomycin, DA clindamycin, TE tetracycline, E erythromycin, CFP cefoperazone, AMC amoxicillin-clavulanic acid, SXT trimethoprim-sulfamethoxazole
  2. a The optical density (OD) was measured at 570 nm using the ELISA reader (stat fax 2100, USA)
  3. b The expression level of each virulence gene was calculated as the ratio of intensity of the target gene to the internal control gene (gyrA)