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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)