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Table 6 Biofilm formation inhibition (IC50) of methanolic extracts against E. coli test strains

From: Phytochemical analysis of medicinal plants of Nepal and their antibacterial and antibiofilm activities against uropathogenic Escherichia coli

S.N.

Plants

IC50 value (μg/mL)

P value (ANOVA)

Bacteria used for the study

EC1a

EC2a

EC3a

EC4a

EC5a

1

A. marmelos

–

–

–

–

376.2 ± 3.6

P = 0.001

2

C. gigantea

389.8 ± 7.5

359.6 ± 10.8

350.1 ± 21.5

299.7 ± 20.5

427.4 ± 2.7

3

E. prostrata

303.1 ± 16.7

–

–

289.5 ± 12.3

356.1 ± 11.1

4

M. oleifera

–

–

314.5 ± 16.9

–

–

5

N. arbortristis

–

–

–

246.2 ± 22.9

–

6

O. lantifolia

–

305.7 ± 21.9

–

–

–

7

P. persica

445.4 ± 8.1

320.9 ± 20.8

–

–

–

8

U. parviflora

–

–

410.5 ± 10.7

–

–

9

Ciprofloxacinb

1.8 ± 0.2

0.9 ± 0.1

0.9 ± 0.1

1.9 ± 0.1

0.9 ± 0.1

  1. The IC50 values of test extracts are significantly different (P < 0.05) from the positive control (ciprofloxacin)
  2. afive different E. coli strains
  3. bthe positive control of the test (Antibiotic used as a positive control)
  4. - = plant extracts were not taken for their IC50 value determination for respective test strains